Description: By default, ABAQUS/Explicit will activate element distortion control for solid elements modeled with hyperelastic or hyperfoam materials. Distortion control cannot be used when the elements are included in an adaptive mesh domain; therefore, if you decide to use hyperelastic or hyperfoam materials in an adaptive mesh domain, you must deactivate distortion control. The use of adaptive meshing in domains modeled with hyperelastic or hyperfoam materials is not recommended since better results are generally predicted using the enhanced hourglass control method and distortion control.

To recover the default behavior from previous versions (no element distortion control), you can use the abaqus upgrade utility with the previousdefaults option.