Dear all, I want to simulate graphene layers in Abaqus/Explicit. To connect two layers, I follow van der Waals forces and apply non-linear spring elements. One problem I have faced is how to choose the unit scale when simulating. If I choose SI(m) or SI(mm), I can not get the visualization of simulation results. I have read some papers which talk about using A, ev/A and eV/A3 for length, force and Young's modulus.
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