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I am modelling a 3D solid model of simply supported sandwich plate with foam core, the core is modelled as Johnson-Cook material model with damage definitions, so the element deletion can be acheived. I tried using tie constraints between the core and face sheets, but due to the deletion of elements in the core at the interface, the face sheet is penetrating into the core beyond the supports. I tried using nodal surfaces and surface interactions, which avoids this issue but after defining the cohesive propeties for the interaction, the analysis is shutting abruply. 

I am modelling a 3D solid model of simply supported sandwich plate with foam core, the core is modelled as Johnson-Cook material model with damage definitions, so the element deletion can be acheived. I tried using tie constraints between the core and face sheets, but due to the deletion of elements in the core at the interface, the face sheet is penetrating into the core beyond the supports. I tried using nodal surfaces and surface interactions, which avoids this issue but after defining the cohesive propeties for the interaction, the analysis is shutting abruply. 

I am modelling a 3D solid model of simply supported sandwich plate with foam core, the core is modelled as Johnson-Cook material model with damage definitions, so the element deletion can be acheived. I tried using tie constraints between the core and face sheets, but due to the deletion of elements in the core at the interface, the face sheet is penetrating into the core beyond the supports. I tried using nodal surfaces and surface interactions, which avoids this issue but after defining the cohesive propeties for the interaction, the analysis is shutting abruply. 

Hi, I tried a Linear perturbation analysis in ABAQUS with surface-to-surface contact. The parts that are defined as contacting surfaces are 0.2mm apart. They are also given a normal behavior with a pressure overclosure option using "hard" contact. However, in some modes where it is expected to be in contact, there is interpenetration. The problem is that it depends on the scale of deformation too. So my question is how to make this generalised, i.e., include no contact in case of tensile mode behaviour and include high stiffness in case of mode involving compressive type behaviour?

Hi!

I am trying to apply a viscous pressure (VP) load to beam elements (B31) but I obtained thie error message: "INVALID LOAD TYPE ON ELEMENT * INSTANCE *. LOAD TYPE VP IS NOT VALID FOR ELEMENT TYPE B31"

Do you have any suggestion?

Thank you!

I have managed to adjust a material property to get the best fit to the experimental response using fminsearch in MATLAB, but I lost access to free MATLAB so I have to use something else. I like Scilab, it works for everything I did with MATLAB except this. 

Scilab throughs and 'invalid handle' error when executing:

  dos('abaqus cae -nogui response.py','-echo');

at the line inside response.py:

  Job.submit(consistencyChecking=OFF)