tensile test specimen
tensile test specimen
(OP)
If a tensile test specimen is held a machine by its top and bottom with a pressure applied at both of these points. The uniform shear stress is Txy= (coefficient of friction)x p.
sigma y is uniform at all horizontal sections and rises linearly from zero at the top. I have the length of the top part which is held in the machine and the dimensions of the gauge length .including a safety factor, I need to find the width of the section held in the machine, so that the yielding will happen first in the gauge section.
Has anyone got any idea how to work this out?
sigma y is uniform at all horizontal sections and rises linearly from zero at the top. I have the length of the top part which is held in the machine and the dimensions of the gauge length .including a safety factor, I need to find the width of the section held in the machine, so that the yielding will happen first in the gauge section.
Has anyone got any idea how to work this out?





RE: tensile test specimen
Regards
Dave
RE: tensile test specimen
RE: tensile test specimen
IE: ASTM A370- 2"x.5"xt -- for sheet materials.
I used to cut lots and lots of tensile bars on a tensilkut machine, the starting width was .749" the jig allowed me to achieve .5"+/- .001" in the gauge section.
JStephen- yielding in the clamped section is kinda ok only if you have properly mounted extensometers on the guage section. Even then its not desireable. I think that the ASTM spec says that any noticable slippage in the grips, or fracture out side of the gauge length is grounds for re-running the test.
RE: tensile test specimen
RE: tensile test specimen