Tangent Modulus (ls-dyna)

- March 26, 2021 at 3:16 pm
  
  goktug.yilmaz
  Subscriber
  
  Hi everyone!
  
  I want to obtain tangent modulus from the results of my uniaxial tensile test. I find the picture below on the internet. However, as you can see, there are infinite number of points where you can calculate the slope. To obtain the tangent modulus of my material, which point's slope is required?
- March 27, 2021 at 4:14 am
  
  ramgopisetti
  Subscriber
  
  E_tan_Calculated / E ratio may be closer to an Elastic-perfectlynplastic case.nE_tan_Calculated = [(1+%EL/100)*S_ult - S_yield ]/ [(ln(1/(1-%RA/100)))- (S_yield/E)]n%EL= % Elongationn%RA= % Reduction in AreanE = ModulusnThe strengths are self Explanatory.nIf you don't know the %RA you can approximate by n%RA =200*%EL/(100+2*%EL)nCheck your other post for detailed answer.nCheers, Ramn
- April 5, 2021 at 11:46 am
  
  goktug.yilmaz
  Subscriber
  
  Dear sir,nnThank you very much for your help. I am very grateful to you. nCould you please recommend a source to me where I can also see those formulations? n

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