S0969 - Tinius Olsen - Astm D143 Wood Tension Parallel to Grain

By -
This grip is designed to meet the very strict guidelines set within the ASTM D143 standard. I have mentioned this standard before, it is one of the most demanding standards available for wood specimens.

One of the most important tests when it comes to the structure of wood is how it reacts in tension.

As wood can be very strong in tension it's is necessary to 'profile' the sample (cut the wood into a specific shape) so that the region undergoing test is uniform, in the middle and weaker than the grip or piece of wood the grip is holding onto.

It also needs to be smaller to allow an extensometer to be added to measure the small changes in the length of the sample.

This grip is essentially self-aligning, the sample slotting into the two fingers.

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 differen
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 and Two C
Read more

Automated Friction "Pinch" testing of Hydrophilic Coatings on Catheters

By -
Image
These days angioplasty, is an endovascular procedure to widen narrowed or obstructed arteries or veins, is almost considered a routine procedure, yet the technology behind it is exacting and subject to rigorous quality and performance control. In this procedure a n empty, collapsed balloon, known as a balloon catheter, is passed over a wire into the narrowed locations and then inflated to a fixed size. The balloon forces expansion of the narrowing within the artery or vein and the surrounding muscular wall, opening up the blood vessel for improved flow, and the balloon is then deflated and withdrawn. A stent may, or may not, be inserted at the time of ballooning to ensure the vessel remains open. Not only are the stents themselves, and the wire used in their construction, tested for tensile strength, compressive strength and stiffness properties, so too are the balloon catheters used to deliver the stent into the body. In recent times, more attention is being paid to
Read more