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Non linear 2D orthotropic

Hi, I'm modeling an orthotropic (2D unidirectional fiber) material with different young modulus in traction and compression. I'm interested to know if it is possible to model this kind of material, for example adding the strain-stress curve. This material will be used as one of the faces of a sandwich structure. Thanks for your help!

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HyperMesh

OptiStruct

v2020.1

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Adriano Koga_20259

Hi Alessio,

in OS you can use 2D ortho materials, but only considering linear behavior of the material. You can provide the traction and compression allowables in order to be used into the failure lawas (Hill, Tsai, ....) but not a stress-strain curve.

For performing this kind of modelling you would need to combine OS with a user material from MultiScale Designer. There you can characterize your composite material both in linear and non-linear behavior and then run a co-simulation between these 2. OS will calculate macro-scale strains and then pass them to MDS to calculate microscale strains and possibly failure or stiffness loss.

Alessio Piccolo

Hi Alessio,

in OS you can use 2D ortho materials, but only considering linear behavior of the material. You can provide the traction and compression allowables in order to be used into the failure lawas (Hill, Tsai, ....) but not a stress-strain curve.

For performing this kind of modelling you would need to combine OS with a user material from MultiScale Designer. There you can characterize your composite material both in linear and non-linear behavior and then run a co-simulation between these 2. OS will calculate macro-scale strains and then pass them to MDS to calculate microscale strains and possibly failure or stiffness loss.

Hi Adriano, first of all, thanks for your answer. It was quite useful. But honestly, I'm not totally interested in a kind of failure or stiffness loss. To be more clear, what I'm trying to modelize is a kind of tape (in fact the tape act in a different way in traction and compression). Are you sure that the multiscale designer could be helpful to this problem?