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How to enter material elasto-plastic mechanical parameters for brittle materials

- September 11, 2024 at 8:23 am
  
  1617836513
  Subscriber
  
  How do you enter material parameters for an elastic phase, i.e., a material with a very inconspicuous linear portion and a variation in Young's modulus?
- September 11, 2024 at 1:35 pm
  
  SaiD
  Ansys Employee
  
  Hello,
  What is the objective of your simulation? The reason I ask is to guage how important that variation of Young's modulus in the elastic part of the stress-strain curve is. For linear elasticity, you can input only a single Young's modulus and Poisson's ratio. Is it possible to approximate that part with a single Young's modulus? For the plastic portion, generally you would enter the yield stress and a hardening law.
  - September 12, 2024 at 1:49 am
    
    1617836513
    Subscriber
    
    Hi, the picture shows a magnesium alloy material, which I would like to use to make a bone nail, after which it will be tested for torsion and pullout strength in bone.
  - September 12, 2024 at 2:27 am
    
    1617836513
    Subscriber
    
    Also if I'm using a multilinear Isotropic hardening model, is the hardening law you're talking about equivalent to the table of input plastic strains and stresses in Figure 2?

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