Bearing Strength of Plastics

By -
Tinius Olsen Engineers have designed a new custom attachment for testing the bearing strength of plastics. This attachment is used with Tinius Olsen’s  S and/or  T series of benchtop tensile testers and Horizon software to report bearing strength.  The bearing strength test is designed to replicate the loading on plastics sheet, or plastics products, where rivets, bolts or similar fasteners are used to join sections and show the bearing stress versus the deformation of the hole for rivet/bolt etc. The allowable deformation of the hole in the material should be enough so that there is no looseness of the joint.  As the picture shows, the grip includes an LVDT Extensometer that precisely measures the amount of hole deformation. This attachment follows the guidelines of ASTM D953.

Comments

Post a Comment

Popular posts from this blog

Grip Jaw Face Solution for Tensile Specimens Cut from Pipe

By -
Image
When conducting tensile tests on sections cut from pipes, be it plastic gas or water pipes or steel pipes, the resulting test specimen dumbbell or “coupon” shape (dimensions of which are defined by the relevant test standard be it ISO, ATSM, GB, GOST etc) exhibits the curve of the pipe, this means it cannot generally be held for the duration of the tensile test using flat parallel grip faces as the curvature of the specimen prevents a good amount of contact between the specimen and the grip faces. The solution is a grip face which mirrors the profile of the curve in the pipe (dumbbell or coupon specimen) a V on one side and radius on the other;   At Tinius Olsen we are able to precisely manufacture and supply such faces to mirror the radius of any curved specimen and implement in our tensile wedge action grips. The faces typically have a 2 mm pitch serration and hardened to 60RC in support of good specimen gripping. The faces are interchangeable for diff...
Read more

S274 - Mesh Weld Shear Test

By -
Image
This attachment is used to test the strength of the welds that hold mesh together. The mesh is often used as a reinforcement for concrete structures. as this is a structural component it is essential to test the consistency of the weld in any given section. A joint is cut from the mesh and placed in this attachment. A grip, the HW 14 is then placed on the end of the rod. a force of up to 50 kN is then applied and the shear strength of the weld measured. There is some adjustment in the design with a sliding plate that allows for different gauges of wire. The applicable standards are: BS4483, ASTM A185, ASTM A497 and ASTM A974. The testing application note for this grip is available from the resource area of our School of testing microsite or by clicking here .
Read more

Tinius Olsen Universal Testing Machine

By -
Image
Tinius Olsen H300KU with Horizon Software   Metals, Plastics, Composites all can be thoroughly tested and analysed on this triple camera extensometer Tinius Olsen work station– This is a truly a UNIVERSAL TESTING MACHINE from Tinius Olsen; 300K-U, 300kN load cell, 1000 degree C  furnace, -70 to 300 degree C chamber, 3 camera video extensometer system (cameras can be used together or individually), tie rods for threaded specimens, hydraulic tensile wedge grips, compression platens, flex bend attachment and Horizon touch enabled materials testing software. All the key parts and accessories are easily handled in and out of the test area using TO’s new accessory handling system – so all accessories are stored on the handling system ready to be simply pushed into place by the operator. Tinius Olsen Video Extensometer with zoomed in Furnace Tinius Olsen H300KU with Furnace Tinius Olsen Tensile Wedge Grip with Video Extensometer Tinius Olsen H300KU with Furnace ...
Read more