Currently I am working with 3D printing and my goal is to model the scaffolds I print in COMSOL. The scaffolds consist of fibers in different directions. The main goal of my model is to examine the tensile strength properties of the scaffolds (Yield strength, Young’s modulus) and obtain a stress/strain curve as close as possible to experimental data. In COMSOL there are a lot of options for the stress and strain to apply (e.g. first principal strain or second Piola-Kirchhoff stress). Can you help me with which stress and strain I should choose?
For anisotropic material you might want to look into the Composites module. Regarding which stress to look at, I think that is more a question you should ask yourself, as comsol can give you any stress you want, but you are the one who is in charge of the measurements and your hypotheses.
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