May826
Materials
- May 22, 2019
- 1
Hi All,
I am modelling a compression test (quasi-static) for a micro lattice structure till 60% of strain.
i run through implicit and also explicit but the problem is that I saw overclosure or penetration of top platen into the top surface of lattice at later time step (around 60% of strain). I tied top and bottom platen to lattices and also used self-contact for individual struts.
I also did hard contact for top and bottom for another simulation but I saw the same overclosure.
Moreover, I know that when I tied the top and bottom platen to the lattices , the initial stiffness is way higher than what I got from experimental test.
I am just wondering if BC and contact is correct.
Can anyone give me advice how I can sort out the problems (over-closure and high initial stiffness).
Many thanks for your help on this point.
I have attached a .inp file.
I am modelling a compression test (quasi-static) for a micro lattice structure till 60% of strain.
i run through implicit and also explicit but the problem is that I saw overclosure or penetration of top platen into the top surface of lattice at later time step (around 60% of strain). I tied top and bottom platen to lattices and also used self-contact for individual struts.
I also did hard contact for top and bottom for another simulation but I saw the same overclosure.
Moreover, I know that when I tied the top and bottom platen to the lattices , the initial stiffness is way higher than what I got from experimental test.
I am just wondering if BC and contact is correct.
Can anyone give me advice how I can sort out the problems (over-closure and high initial stiffness).
Many thanks for your help on this point.
I have attached a .inp file.