During the tutorial you will display the output from Case 2 of the example problem, “Indentation of an elastomeric foam specimen with a hemispherical punch,” Section 1.1.4 of the ABAQUS Example Problems Manual. The problem studies the behavior of a heavy metal punch impacting a soft elastomeric foam block; the resulting deformation and strain are shown in Figure D–1.
The problem is modeled in two dimensions and is divided into three steps:The punch initially rests on the surface of the foam block and compresses the block under its own weight. The gravity loading is ramped up over two seconds; but the analysis continues for a total of five seconds, allowing the foam to relax fully. The analysis uses the quasi-static procedure to model the response of the foam block during the step.
The punch is forced down with an impulsive load that varies according to a half sine wave over a period of one second. The response of the foam block is modeled using the implicit dynamic procedure.
The impulsive load is removed, and the punch is allowed to move freely while the foam expands and contracts. The viscoelastic foam damps out the vibrations, and the step runs for 10 seconds while the model returns to steady state. As with the second step, the response of the foam block is modeled using the implicit dynamic procedure.
The tutorial consists of the following sections:
