Crispy2
Mechanical
- Jul 15, 2011
- 5
Hello all,
Please could you help shed some light on this issue that I can't figure out.
A thin sheet of soft uniform material is lying flat on a rigid surface, and is subjected to transverse compression (ramp increasing force) by a flat indenter from the top.
In real life, past a certain point the material is densified and becomes crushed, such that it deflects less and less per equal unit of increased compression force (i.e. it becomes stiffer).
In a finite-element model, this sheet is represented by a simple linear elastic material formulation. Is this stiffening behaviour intrinsically taken into account by the fact that the elements are densifying beneath the indenter? Or, is a linear elastic material model not sufficient to capture this behaviour?
Thank you
Please could you help shed some light on this issue that I can't figure out.
A thin sheet of soft uniform material is lying flat on a rigid surface, and is subjected to transverse compression (ramp increasing force) by a flat indenter from the top.
In real life, past a certain point the material is densified and becomes crushed, such that it deflects less and less per equal unit of increased compression force (i.e. it becomes stiffer).
In a finite-element model, this sheet is represented by a simple linear elastic material formulation. Is this stiffening behaviour intrinsically taken into account by the fact that the elements are densifying beneath the indenter? Or, is a linear elastic material model not sufficient to capture this behaviour?
Thank you