Old 08-05-19, 07:49 AM
  #44  
cyccommute 
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Originally Posted by Darth Lefty View Post
I work in a field where we use some of these machines and the ones for fatigue are different. The frequency and amplitude that they pull is dictated by the test, and they need an actuator and control system to do that. A test for modulus and yield is much simpler. It just pulls with increasing force and measures the strain. There are other types too. We make rubber stuff and the strain rate is important for us because it's viscoelastic. Our machines are Instron brand.
Yes, measuring fatigue is a different test. My mistake. But elasticity, yield and ultimate tensile strength for spokes are all measured on the same instrument at the same time. You get them of the same graph.
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