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Isotropy: Updated Lagrangian Vs Total Lagrangian

Submitted by Jayadeep U. B. on

Dear All,

 I have seen it being mentioned that the material at an updated configuration in an Updated Lagrangian Formulation (say in FEM) may not remain isotropic, even if the reference configuration was isotropic.  However, I have not seen any detailed discussion on the matter.

Hence, I would request your comments on:

Effect of mechanical pre-stretch on the stabilization of dielectric elastomer actuation

Submitted by Bo Li on

A dielectric elastomer is capable of giant electromechanical actuation but fails at breakdown due to instability under certain conditions with a small deformation. By applying a mechanical pre-stretch, one obtains a stabilized large actuation.

cohesive simulation in abaqus

Submitted by manivannan on

Hi all ,

       I am simulating Cohesive zone simulation of polymer coated steel using abaqus 6.9 ( Room Temp ).  The thickness of steel plate is 0.8mm ( 800 Micrometre). Thickness of PET ( Poly Polyethylene terephthalate ) is 0.03 mm ( 30 micrometre ). Cohesive zone is defined in between these two materials with zero thickness. I use standard traction seperation method embedded in abaqus 6.9. I have the following questions

(a) Regarding material properties,

ANSYS crack propagation(growth) under cycle load simulation.

Submitted by Leem SangHyuck on

I want to simulate the crack growth under cycle load through ANSYS

I have thought two way to simulate it, first way is cohesive model(debonding)

second way is remesh(rezone at certain load step), this way is important for me, since this method mapsolves the new mesh into the old mesh, so the plastic strain information near crack tip element could transfer to new mesh.

I need a example file(code-command file of ansys) or comment