Learning Forum

[N0834237]

The two properties I'm struggling to find a way to add is the elongation at break and shore hardness, is it possible to add these in ANSYS. I will post picture in second post.

[N0834237]

[peteroznewman]

The property you would add to the material model is either Bilinear Isotropic Hardening Plasticity or Multilinear Plasticity.

Then when you have a model, such as the tensile sample coupon, you can apply the Displacement to the end and plot Total Equivalent Strain. When the strain value reaches 5.2 that represents when the coupon would break.  You won't see the break in the simulation, you will just know that is the displacement when the break occurs.

 ANSYS models have no use for Hardness measurements.

[N0834237]

This material is what the compressed lattice is made from, so I've added multi-linear isotropic plasticity with those data from the graph but the results are too different to the experimental results. The experimental lattice compression reaches 1400 N whereas ANSYS shows a maximum force of 16N in addition the behaviour of the curve is different.

[SaiD]

Hi,

Are the dimensions of the specimen used in the Ansys model same as those of the experimental specimen? Does the stress-strain curve obtained from the Ansys model match the one you have experimentally? The stress-strain curve will match irrespective of the specimen dimensions. But force=stress*area, so the force-displacement plot might differ if the dimensions of the specimen are changed.

Another possible source of error could be that you are using a different unit system e.g. the experimental specimen is 5 cm in length, but you are using mm as the unit of length in your model and hence you have a specimen of 5 mm.

Hope this helps,

Sai

[N0834237]

Hello thanks for you suggestions, I've found out that some of the dimensions was wrong. I have retrieved the exact model used in the experiment now and will update this post when I get the new results.

[N0834237]

Update: The results are looking much better.