Orthotropic using tensile test data

- October 22, 2020 at 1:14 pm
  
  Erica2018a
  Subscriber
  
  HinI am trying to model cardboard and have recently received some tensile data of the papers used in both the machine and cross directions. The Yield stress and UTS are not very apparent in the data and so ideally I would like to use the test traces.... Is that possible in ansys to use multi-linear data in 2 directions?n
- October 29, 2020 at 6:24 pm
  
  Sean Harvey
  Ansys Employee
  
  Hello, so you can use the Hill Yield Criteria as a first pass. You can find this in the help by searching for Hill Yield Criteria. It is not going to permit different stress strain curve as you requested, but It allows for the yield to be different in the different directions, but using the same shape of the curve. I know you don't have a distinct yield stress, so this may be of limited value. But in general, Hill can be a good starting point. nDepending on what you are trying to simulate. Can you describe how the material will be used in the simulation. For example is this crushing, tensile, impact, there are options in LS-Dyna or Autodyn material models that can accommodate, especially if this will be part of drop test, or some transient dynamic simulation.nnRegardsnSeann