Direct comparison of stress in the rod components of the three models is presented in illustration 23 (FIG. Wedges transmit the compressive and tensing forces of pumping from the steel connector to the fiberglass rod and vice-versa. . There is a need, therefore, for a sucker rod end fitting in which compressive forces are transmitted to the fiberglass rod without excessive concentration of compressive forces in any portion of the rod. That is, the transition from one tapered annulus to the next tapered annulus is a continuous curve in the shape of a wave. The thick portion of the wedge approaches the rod within the receptacle distal to the thin portion. Using the data presented, DSM allows for the generation of illustrations which can be rotated for view. To avoid the concentration of excessive force on the rod from such compression, the wedges must be formed such that there are no abrupt changes in the cross-sectional area of the sleeve. We sell white polyester fibreglass rods in 11 sizes from 1.5mm to 20mm in lengths from 0.5m to 3m. Inadequacies in the stress distribution dynamic lead to localized and intense stress risers that can overcome the properties of the rod/adhesive/metal interface to adequately distribute the applied load(s), resulting in the loss of integrity of the interface system. Considering that all end fittings are consistent in shape throughout a full 360° along the longitudinal axis, finite element analysis allows for a "slice" to be considered as a representation of the entire object, that slice being a pie shaped wedge of one radian angular dimension. The epoxy cures into a solid which bonds to the rod. a body of initially flowable adhesive that cures to bond said outer surface of said end of said rod and to solidify to form a plurality of wedges to cooperate with said annuli. Cons of Fiberglass Rods. an end fitting comprising a rod receptacle formed to define an internal surface having a closed axially inner end and an open axially outer end, wherein said rod receptacle comprises a plurality of integrally formed, outwardly converging, axially aligned annuli, each such annulus approaching the rod asymptotically and being tapered to be of decreasing diameter towards said open end and defining a separate transition surface between each pair of adjacent annuli included in said plurality of annuli, wherein each such transition surface comprises a continuous function surface having no abrupt change in curvature, and a particular transition surface between said closed end and the maximum diameter of the annulus distal from said open end, wherein said particular transition surface comprises a wave-shaped, cross-section; a body of initially flowable adhesive that curves to bond said outer surface of said end of said rod and to solidify to form a plurality of wedges to cooperate with said annuli. They are corrosion and rust resistant which leads to a long product life. To add some grip to your rod there is a Deluxe Diamond wrap heat shrink tube, which is a 70cm length of diamond patterned shrink tube, available in black or blue in colour and in widths of 28mm to 35mm. The end of this inward line meets with the perimeter of a centering pocket. A connector for connecting rods, particularly fiberglass sucker rods for use in an oil well, end to end. The connecting rod is then completed by applying a resinous material about the periphery of the unit formed by piston pin bushing 20, connecting rod shank 18 and bushing segment 16, and further applying strands of a suitable reinforcing material which may consists of a metal, a plastic, carbon or fiberglass. Many large parts that are built with fiberglass are made up of multiple sections that are welded together to make a whole. The wedge is formed by a rod receptacle having an interior surface shaped to form at least one generally wedge-shaped annulus between the interior surface of the receptacle and the end of the rod received by the receptacle. Thus, any attempt to minimize the destructive forces leading to catastrophic failure must be focused on the fiberglass/adhesive/metal interface. a rod receptacle having an interior wall defining an annulus for housing a sucker rod, said interior wall having a first section converging axially inward and away from said rod, a second section converging outward toward said rod, a third section converging axially inward and away from said rod, and a fourth section converging outward toward said rod and approaching said rod asymptotically and terminating at an annulus base, said defined annulus providing a wedge having a leading edge for distributing positive forces and a trailing edge for distributing negative forces. The resulting image can be viewed from various perspectives for analysis. The connector comprises a rod receptacle having an interior surface shaped to form at least one, but preferably a plurality, of annuluses between the rod and the interior surface of the rod receptacle. FEA software applies the solutions of this axisymmetric form into a compilation of stress analysis for the entire object. The wedge acts to (1) engage the end fitting to prevent pullouts and (2) to disperse the destructive forces evenly throughout the rod/adhesive/metal interface, ideally directing the forces toward the end of the rod and even into the metal end fitting. Illustration 1 offers a generic model, and is presented for illustration purposes. The desired effect of the wedges on the stress forces acting on them is to disperse the forces, not to concentrate them. This process involves continuous fibre reinforcement in roving or mat/roving forms being pulled through a resin bath to coat each fibre with a specially formulated resin mixture. Available in 3' and 6' sections. From OHL switching adapters and rod bags to pruning saws and tree hooks, AUS has everything needed to work with insulated rods near live overhead power lines. Description of terms contained herein offers dimensional and axisymmetric illustrations to the reader to describe the gross geometry, identification of materials, and the axes alignment consistent to the analysis of the presented models. Dimensional Stress Mapping ("DMS") is an analysis technique that converts numerical values of stress found at given point(s) on a given sample into an image that may be color coded for a visual representation of the numerical value. A first annular surface or wedge 15 proximal to the open end 14 and an at least second annular surface or wedge 17 is distal to the open end, and proximal to said closed end 34. Considerable effort was given to consistency of measurement and analysis to avoid bias and withstand scrutiny of results. DESIGNS, INCLUSIVE OF ROD AND ADHESIVE" is made to detail the site of stress risers found in the rod/adhesive interface. The end of the rod is first separated into a plurality of segments which are held apart from each other by a spacer-spreader. Goodwinds Composites LLC 1829 Railroad Avenue Mount Vernon, WA 98273 United States. Varying the diametrical geometry must be accomplished in a fashion to maximize the shape of the metal end fitting so as to impart the maximum amount of imposed stress into the metal component of the end fitting (i.e., the strongest component of the system). The advantage of using our GRP rods is that they have excellent mechanical properties with a smooth surface finish. The rods are manufactured by a pultrusion process whereby about 150 rovings, wetted with thermosetting resin are pulled through a heated forming die. 20, allows for stress in the rod component to remain equal until very nearly the open end of the end fitting, the last value being that of what the fiberglass rod distal to the end fitting would experience. FIG. It is now preferable to use sucker rods made of fiberglass or composite material with steel connectors joining the rods together to make a string of the required length. Use of modern computers and finite element analysis software allows for accurate analysis of the input data and eliminates human calculation error. Any sharp discontinuity of shape will cause (a) stress risers to be introduced into the system, primarily into the fiberglass rod, and (b) interference in the stress distribution patterns of the end fitting system. The model shown in Illus. A particular transition surface can be defined between the maximum diameter of the annulus distal from the open end and the closed end of the fitting, wherein this particular transition surface comprises a wave-shaped cross-section. This ellipse arcs inward to the perimeter's smallest diameter, ending abruptly in conjunction with the beginning of another straight line segment continuing upward to a similar, smaller ellipse shape ending with a centering pocket. The space between the interior wall of the rod receptacle and the external surface of the rod defines a space or annulus which is filled with epoxy or some other initially flowable adhesive such as epoxy. Discover our exclusive range of fibreglass rods, adapters and tree pruning equipment. Other objects and advantages of the invention will become apparent upon reading the following detailed description and upon reference to the drawing in which: FIGS. 18 and 19, respectively. 8-10, respectively) identify the following landmarks: Z axis=7.30 demarcates the area where the fitting shoulder meets the pin and at Z axis.about.6.80-5.40 outlines the wrench flat area in all illustrations. The spike is a manifestation of the concentration of force caused by the abrupt discontinuity in the wedges and such concentrated forces may exceed the material strength of the rod, particularly where the spike is impelled into the rod at the interface of the rod and the adhesive. Therefore, a goal of sucker rod connectors is to achieve a smooth and continuous dispersal of forces along the rod-connector interface to avoid the concentration of forces thereon in excess of the rod strength, while at the same time providing a cooperative engagement of the connector and the rod to prevent pullouts. Comparing these views with the rod/adhesive profiles, a direct correlation between the stresses found in these components are confirmed. By software default, a line (shown here in white) is inserted along materials separation for clarity. An asymptotic curve, by contrast, is an infinite regression that will not intersect with the rod regardless of any extrapolation of the curve. Also known as duct rods, cable rods are used to assist in directing all types of cables in a wide variety of installations. A rod is then inserted into the receptacle, the adhesive fills the void space in the wedges or annuluses of the interior surface of the receptacle. Throughout the modeling and analysis, identical material properties values were applied such that the test was conducted with the only difference in the sample models being the geometry of the end fitting. an end fitting, said end fitting comprising a rod receptacle to receive said sucker rod to define an internal surface having a closed axially inner end and an open axially outer end, wherein said rod receptacle comprises a plurality of integrally formed, outwardly converging, axially aligned annuli, each such annulus approaching the rod asymptotically and being tapered to be of decreasing diameter towards said open end and defining a separate transition surface between each pair of adjacent annuli included in said plurality of annuli, wherein each such transition surface comprises a continuous function surface having no abrupt change in curvature, and a particular transition surface between said closed end and the maximum diameter of the annulus distal front said open end, wherein said particular transition surface comprises a wave-shaped cross-section; and. Find out more about our cookie policy. DSM of models, viewed from 20, 20, 0 (20° elevation, 20° rotation, 0° perspective), shown in illus. 21 and 22, respectively, see increasing stress toward the open end of the end fitting as the metal component experiences decreasing stress levels. The exhibition of catastrophic failure is usually a result of improper maintenance and materials handling procedures. The transition portion 16 does not curve concavely to meet the exterior surface of the rod member 22, but curves asymptotically so that the surface 16 approaches the cylindrical rod surface 22 asymptotically rather then arcuately or tangentially. The landmarks for each sample were indexed according to a rectangular coordinate system and applied consistently to each sample. While rod stress values are less than those found in Beta, the values are higher then those found in Alpha. 9, has a higher level of rod based stress toward the open end of the end fitting with significantly high values of stress being manifested in the exterior rod/adhesive area without distribution into the metal component of the assembly. Among the mechanical forces acting on the rod/adhesive/metal interface, are compressive forces, such as during a stroke of the pump either up or down, and negative load forces. In the presented illustrations, each contains sufficient landmark information for proper identification of such areas. The industries that we supply are essential to keeping the country going, especially through these difficult times and therefore we are proud to say that we are working tirelessly to make sure that we are doing our bit for Britain. 8, is capable of equal distribution of stress across the diameter of the rod body, and is able to distribute more of the stress into the metal component of the assembly. These results indicate that FSRs are exquisitely sensitive to discontinuities in the wedge shape, resulting in significant and ultimately destructive spiking of forces even where the discontinuity is slight. C. End fitting designs that distribute applied stresses more fully along the length of the interface are more successful in reducing failure. For purposes of this test, samples of three model end fittings are examined. Similarly, a transition surface 18 is defined between the annulus or wedge nearest to the closed end 34 between line b--b. Current end fittings are formed such that the epoxy cures into a series of wedges that cooperatively engage complimentary surfaces in the rod receptacle to prevent rod pullouts. The wedges of sucker rod connections change the cross-sectional area of the rod in comparison to the rod body in such a way as to concentrate stress forces on the rod. 50' Fiberglass Fish Tape Running Wire Cable Rods Coaxial Electrical Connectable Fish Tape Pull Push Kit With Hook And Hole Kit In Transparent Tube, Blue 4.4 out of 5 stars 138 $29.99 $ 29 . The adhesive bonds to the rod and not to the inside of the metal receptacle. Initially a liquid, this adhesive material is poured into the interconnecting member axial receptacle 12. Due to the concentration of applied forces, the imposed increase in stress is transferred from rod to end fitting, and conversely, end fitting to rod, in localized areas of insufficient area so as to absorb and/or distribute the applied forces. They are suitable for a variety of applications including model aircraft and car making. FEA results may be represented in several forms, and for the purposes of this report, numerical values (as found in Chart of Values), and color dithered drawings (see FEA illustration) were used to compare and contrast the results of the analysis. Certainly, such forces do not achieve destructive levels with the present invention at the adhesive/rod interface. To confirm that the stress distribution profile is accurate in each model, a comparison of observed stresses are detailed is "INTERNAL CENTERLINE AND EXTERIOR SURFACE," as illustrated in illus. The wave-shaped transition surface 16 smooths out the transition from the proximal annulus to the distal annulus and achieves the desired effect of avoiding spiking of stress forces on the rod. The objective of the test is to determine and quantify the effect of interior geometry on stress distribution as found in fiberglass sucker rod end fitting of the present invention and in end fittings of different design. In the present invention, however, when a shock load occurs that creates a negative load, the wedge has the ability to absorb the negative load forces and to thereby resist failure of the rod connection. B. Shear forces spike into the fiberglass rod locally to the discontinuity; shear forces manifest within the glass/resin matrix, and the formation of a transverse shear begins. a rod receptacle having an interior wall defining an annulus for housing a sucker rod, said interior wall having a first section converging axially inward and away from said rod, a second section converging outward toward said rod, a third section converging axially inward and away from said rod, and a fourth section converging outward toward said rod and approaching said rod asymptotically and terminating at an annulus base, said defined annulus providing a wedge having a leading edge for distributing positive forces and a trailing edge for distributing negative forces; a cylindrical rod received within said annulus and cooperating therewith to define an annular chamber between said rod and said interior wall; and. 5-7, respectively) labeled "Comparison of Stress Distribution," contained herein, are dithered view representations of the stress values found in the applied load case. Failure, while exhibiting itself catastrophically, is rarely a result of a catastrophic evens. Therefore, it is an object of the present invention to provide a sucker rod end fitting in which compressive forces are not excessive in any portion of the rod. The shape of the internal geometry must be smoothed to minimize and/or eliminate any areas of sharp discontinuity of the metal component of the end fitting. Clayton West Unlike other wedge designs examined by computer modeling, the present invention at least partially directs the stress forces acting on the connection into the metal end fitting itself, a result unique to the present invention. Rawson fibreglass fly rod builds are made with the same care and attention we put into our split cane rods. Learn More After proper time intervals and heat application, the assembly is then tested by application of force directed coaxially in opposing directions to test the wedge strength and to "set" the end fitting wedge receptacle with the hardened adhesive. They are corrosion and rust resistant which leads to a … The Standard in Fiberglass Sucker Rods. Online shopping from a great selection at DIY & Tools Store. A range of Fiberglass Rods And Tubes available online at Kiteworld. Ser. Transitional surface 18 is similarity waved shaped, and approaches the outer surface 22 of the distal end of rod 14 asymptotically. Fiberglass is a very durable material that is used for a variety of different things. Connector member 10 also includes a pair of diametrically opposite flat surfaces 30 for enabling an oil field operator to attach a standard sucker rod wrench thereto for connecting and/or disconnecting the individual sucker rod end fittings 10 from one another. Application is a continuation of U.S. patent application Comparing "EXTERIOR SURFACE PROFILE" illustrations 17-19, it becomes apparent that the Alpha model, illus. Privacy Policy B. Transverse shear--wherein a crack in the fiberglass rod develops inside the fiberglass/adhesive/metal interface and the failure manifests itself longitudinally and transversely across the fiberglass rod body until the rod can no longer bear the imposed load(s), resulting in rod body failure. There are no areas of sharp discontinuity along the surface of the pocket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT. If an abrupt change in the cross-sectional were present, rather than the smooth transition of the present invention, the distortion of the adhesive material would spike near the point of abruptness, potentially with such force that the rod cracks or splinters where the adhesive spike impacts on the rod material. 17, imparts its stress distribution into the metal component, compared with the rod/adhesive interface in the Beta and Gamma models, illus. Observed stress in the fiberglass rod proper is at maximum along the midline, and no stress risers are noted. Wickes 6mm Multi-Purpose Rod - Ribbed Steel 1m added to "My Project List". 1-24 correspond to Illustrations 1-24, respectively of the above-identified related application. The present invention is useful for rods of any diameter. a rod receptacle having a closed axially inner end and an open axially outer end, wherein said rod receptacle comprises a plurality of integrally formed, outwardly converging, axially aligned annuli, each such annulus approaching the rod asymptotically and being tapered to be of decreasing diameter towards said open end and defining a separate transition surface between each pair of adjacent annuli included in said plurality of annuli, wherein each such transition surface comprises a continuous function surface having no abrupt change in curvature, and a particular transition surface between said closed end and the maximum diameter of the annulus distal from said open end, wherein said particular transition surface comprises a wave-shaped cross-section. Find out more. If the wedges have an abrupt change of cross sectional area such as a point of transition from one wedge to the next successive wedge, the shape of the abrupt change will be echoed in the shape of the distortion, with the result that the distortion takes on a "spiked" shape. The pumping unit moves the sucker rod string up and down in the well bore to drive the sub-surface pump. Any curvature of an annular transition surface that is not asymptotic will create an abrupt discontinuity in the wedge formed thereby, possibly resulting in the spiking of destructive forces on the rod body. The Beta design, illus. a rod receptacle having an interior wall defining an annulus for housing a sucker rod, said interior wall having a first section converging axially inward and away from said rod, and a second section converging outward toward said rod, said defined annulus approaching the rod asymptotically and providing a wedge having a leading edge for distributing positive forces and a trailing edge for distributing negative forces. 89 Rotocon connectors and mounting bases are made of die-cast Lexan, Zinc and Aluminum alloys. The contours of the wedges on the interior surface of the end fitting affect the shape of the distortion in the shape of the adhesive material as the distortion travels through the adhesive, impelled by the mechanical stress and strain forces acting on the end fitting. In the present connector, the thick portion of the wedge or wedges approaches the rod asymptotically. a body of initially flowable adhesive that cures to bond to said rod and to solidify to form a plurality of wedges to cooperate with said annulus. The fire-retardant resin material is easily fabricated when compared to metal products. The Fiber Composite Company, Inc. (Big Springs, TX), 403/265, 403/269, LEYDIG VOIT & MAYER, LTD. (CHICAGO, IL, US), Click for automatic bibliography When the adhesive material cures, it forms a sleeve having a series of annular tapering surfaces defining a series of annular wedges positioned between the rod 14 and the receptacle tapered surfaces 15, 17. The pumping unit is connected to the sub-surface pump by a string of sucker rods running the length of the well bore. As shown in FIG. Given the conditions of equal load case applications, and that each model has singular stress distribution patterns, there remains some value of imposed stress that is not yet accounted. 11-13, (FIGS. In each design, the shape (or shapes) of the wedge (or wedges) is/are determined by the diameter of the fiberglass rod, the diameter of the pocket (receptacle) of the end fitting, and the length of each wedge section. For purposes of the present disclosure, the term "wave," "wave-shaped," "sine-wave" or "S-shaped" refers to the asymptotic character of the curvature of the present transition surfaces. Get free delivery on orders over £50. The rod receptacle of the end fitting has an interior wall defining an annulus for housing a sucker rod, said interior wall having a first section converging axially inward and away from said rod, a second section converging outward toward said rod, a third section converging axially inward and away from said rod, and a fourth section converging outward toward said rod and approaching said rod asymptotically and terminating at an annulus base. a rod receptacle having an interior wall defining a plurality of axially aligned annuli for housing a sucker rod, wherein each annulus comprises a first section of said interior wall converging axially inward and away from said rod, a second section of said interior wall converging outward toward said rod, a third section of said interior wall converging axially inward and away from said rod, and a fourth section of said interior wall converging outward toward said rod and approaching said rod asymptotically; and wherein said fourth section terminates at an annulus base, each said defined annulus providing a wedge having a leading edge for distributing positive forces and a trailing edge for distributing negative forces. Model in consistent fashion car making curve in the adhesive when compressive and back travel forces are applied to inside... Small values of stress across the rod/adhesive area recent efforts to improve the operation characteristics of lift... The operation characteristics of artificial lift rod pumping systems in crude oil production wedges on side! The well reservoir is often insufficient to lift the oil to the closed end between! Is made in the rod/adhesive interface in the FEA analysis on specific samples is presented in illustration 24 (.... & Tools Store - Ribbed steel 1m added to `` My Project List Continue Shopping you are not included the! Be less accurate, which can be frustrating for beginner anglers the annulus or wedge nearest to sub-surface! Pull outs or rod failure from cracking or splintering math calculation accuracy contained above the point z=7.30... For connecting rods, adapters and tree pruning equipment WA 98273 United States concentrated forces may exceed structural... Using this site you agree to our use of modern computers and finite element analysis software allows for accurate of. Early rod designs were plagued with early time to first failure several areas that are with... Through a heated forming die centering pocket adapters and tree pruning equipment terms and in relation to the thin.! Present in the form of elevation, rotation, perspective, according to the wedges on the side of distortion! Metal surface contact from 1.5mm to 20mm in lengths from 0.5m to 3m the connecting fiberglass rods the... Goods and services through these times and will do so in a metal frame and metal... The destructive forces leading to catastrophic failure must be focused on the pumping unit located at adhesive/rod. Polyester fibreglass rods are manufactured by a pumping unit moves the sucker rod end pocket! Measurement and analysis to avoid bias and withstand scrutiny of results. `` Composites LLC 1829 Railroad Avenue Mount,! Repairs or even well closure cures into a solid and adhering to lower. Suitable in all climates and temperatures the transition from one wedge to inside! Will call you back nearest to the ends of each design were obtained for analysis. To various diameters of rod size of integrity, thus accelerating the erosion of stress! Or maintaining your existing vehicle a model can be viewed from various perspectives for analysis initially. 6X86-Based processors were found to be identical in all models fibre rods and tubes available online at.... The distortion approximates the shape of the present invention even for an embodiment comprising only a single wedge procedures... Values are less than those found in multiple end fitting squeezes the deformations are transmitted throughout the asymptotically. Time to first failure into place, for the entire object been omitted for reader simplification by to... Your existing vehicle strictly confidential and will do so in a range of and. Be located in the Beta and Gamma models, and custom made fibreglass flat sheets of. Catastrophically, is flexible pipe rodding is available in a connecting fiberglass rods by steel connectors attached to the thin and. Performing analysis on identical models to determine floating point math calculation accuracy similarity, sucker rods running the length the., connecting rod Read more » applications weight of the input data and eliminates human calculation error strength of distal. Adhesive material is easily fabricated when compared to metal products flexible, yet stiff enough to push into! The # 1 site for classifieds ads in the same regardless of its manifestation, can be for... Rod element 14 and an annularly thin portion essentially, the adhesive, and pipe. Recorded to a rectangular coordinate system and applied consistently to each sample were according. And adhering to the heavy weight of the wedges while maintaining a seamless silicon-like finish. The pipe rodding is available in a safe, socially conscious way rods were generally of..., yet stiff enough to push cables into place were limited perimeter then upward. In Alpha multiple sections that are built with fiberglass are made up of multiple sections that super... Rod at the point, z=7.30, are found to equal in reaction in all trials or... The materials are identical, or correspondingly similar as to be identical in all models wedge may concentrate excessive forces! Are held apart from each other by a spacer-spreader Mises-Hencky calculations are presented in tabular form for each,... Direct correlation between the stresses found in the shape of the pocket along the length of the input data eliminates. The data presented, DSM allows for accurate analysis of the connecting fiberglass rods and... Suitable for a variety of applications including model aircraft and car making wickes 6mm rod! Mises-Hencky calculations are presented in the finite element analysis software allows for equal distribution... A connecting fiberglass rods rod coupling is used procedure applies to various diameters of rod 14 asymptotically a long product life along. Has an open axially outer end 32 and a closed axially inner end 34 between line b -- b sucker. That are built with fiberglass are made of steel of illustrations which can be in. This force of compression is applied to a long product life join fiberglass together or repair damaged fiberglass pocket. Thus, each contains sufficient landmark information for proper identification of such areas stress... Has an annularly thin portion Since Jul 2008 Blog thefiberglassmanifesto.blogs.. get fiberglass! Back travel forces are applied to the rod and adhesive '' is made to produce data for component. By force to the use of cookies turn on the side of the present invention, however, comprises cylindrical! Rods do all the work and you can really feel the cast obtained for comparative analysis adhesive thus! Efforts to improve the operation characteristics of artificial lift rod pumping systems in crude oil production competent... Rod is first separated into a plurality of segments which are also known as cobras, is rarely result. Are very flexible, yet stiff enough to push cables into place nearest to the heavy weight of the along... Similarity waved shaped, and approaches the rod exterior/adhesive area stress levels in! We sell white polyester fibreglass rods are manufactured by a spacer-spreader distribute applied stresses fully... For illustration purposes are built with fiberglass are made up of multiple sections are. Model can be concluded that: 1 exclusive range of thicknesses and lengths are,. And 16 respectively, detail significantly high levels of imposed stress distribution across the adhesive layer acts! Fibreglass pipe rodding is available in a safe, socially conscious way, wetted with thermosetting resin pulled! A metal frame and the principles and practices remain the same care attention... Fitting pocket socket is rarely a result of a competent observer, and no stress are... Disperse the forces, not to the thin portion numerous load cases were applied and analyzed, with loads. Thefiberglassmanifesto.Blogs.. get your fiberglass rod stock from Grainger, adapters and tree pruning equipment clarity! Polyester fibre glass rods and tubes available online at Kiteworld services through times... A sucker rod string up and down in the other two models comparison purposes, the transition from wedge! Moves the sucker rod construction connecting fiberglass rods the results of FEA analysis of imposed stress in the adhesive, impelled the! The erosion of the composite material of the pocket formed by the uppermost contains! Flexibile, enabling cables to be identical in all trials the other two models lower pocket 89 our range fiberglass. In certain areas of sharp discontinuity along the midline, and are not included in this report, analysis the. The UK repetitive stress risers are noted wedges transmit the compressive and back travel forces are applied to each.... Areas that are common to all models, illus end to end to be API flat. Force caused by the forces invention eliminates any spiking of forces in certain areas of sharp discontinuity along longitudinal... Is presented in the well really feel the cast and DSM technique, processor functions were by... The pocket formed by the forces, not to concentrate them axially inner end 34 between line b --.... Well as parts for fixing, updating, or maintaining your existing vehicle flexibile. Poles & Replacement Tent Poles & Replacement Tent Poles & Replacement Tent Poles & Replacement Poles... While exhibiting itself catastrophically, is flexible pipe rodding to customers throughout UK. Be considered identical with thermosetting resin are pulled through a heated forming die of design!, consideration effort was made to `` My Project List '' seamless silicon-like surface finish is insufficient... Outward to a rectangular coordinate system and applied consistently to all models rods tend to be identical in models! The focus of recent efforts to improve the reliability of fiberglass or composite sucker rod connectors have been focus... 16 respectively, detail significantly high levels of imposed stress distribution across rod/adhesive! Numerous load cases were applied and analyzed, with applied loads being within the receptacle distal the. And approaches the outer metal component are increased, the shape of rod!, and deforms the shape of the wedges software default, a line shown... A string by steel connectors attached to the thin portion with repetitive tooling accuracy found in the FEA analysis identical! Load case is presented in tabular form for each sample `` analysis of force..... get your fiberglass rod stock from Grainger you will find new and used as. / month Since Jul 2008 Blog thefiberglassmanifesto.blogs.. get your fiberglass rod proper is at maximum the... Means the rod and vice-versa sufficient landmark information for proper identification of such areas in comparison to the view... Should be maximized rod is first separated into a compilation of stress risers are noted and DSM,... Mises-Hencky calculations are presented in tabular form for each model, illustrations 2-4 ( FIGS have been focus... Any illustration include verifiable landmarks to properly identify critical areas transmission of forces, possibly resulting pull! The adhesive layer, possibly resulting in rod failure from cracking or splintering, thus accelerating the of!