Automatic time stepping abaqus 6.143/31/2024 Note 2 : since your material is quasi-incompressible you should pay attention to pressure-locking. They are the same, 'GREEN' was used in versions prior to 10.1.1 and 'GROT_GDEP' has been used ever since. In recent Code_Aster version this error (zero elongation) automatically enables re-cutting of the time step, often improving convergence. Since zero elongation seems to me a problem linked with volumetric locking, a classical problem in incompressible elasticity, I was wondering if any mixed U-P formulation is available in the code. I read that this problem can be solved using a GDEP_GROT deformation measure, but I am dealing with large rotation+displacement+strains, therefore I use GREEN tensor (is that correct?) Then, in many, many cases I tried to solve, ZERO ELONGATION messages appears. The solver does it job since stretches are 'moderate'. Monney-Rivlin constants (in kPa, since the system is in kg,mm, sec): trapezoidal prism (0.25 tick) with 1.5 mm height and respectively 3.5 mm and 2.0 mm long parallel sides zip file, there is a very simple model, that can be schematically summarized as follow: It occurs always when stretches reaches high values when dealing with a Mooney-Rivlin material. I am experiencing the same error ( Zero elongation for hyperelastic material) on different geometries and load. I am in troubles with a very simple hyperelastic simulation.
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