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This resource is devoted to the finite-element analysis in LS-DYNA environment.

We are solving the tasks on strength, shaping, breaking, optimization and lots of others using advanced computer technologies.

Hammer

This task illustrates a cyclic drop-contact interaction of an absolute rigid body with a deformable body. A hollow cube, consisting of SHELL163 elements is considered as a model of deformable body. Hammer model consists of SOLID164 solid-state components. Setting a complex hammer model movement with the help of PART_INERTIA and BOUNDARY_PRESCRIBED_MOTION_RIGID control cards may be also considered a model peculiarity.

Boundary conditions, fixing the model in space, were suggested on the first stage of solving the task to the finite-element model, which was built by the means of LS-DYNA preprocessor. Using the mentioned above cards allowed performing the reciprocal motion of the hammer in the local co-ordinates system. Thus the demonstration of deformations accumulation of the elasto-plastic cube model was performed.

As this example has only been meant for LS-DYNA environment resources’ demonstration, the material model does not contain destruction criteria and the medium, filling the internal space of the cube is not considered.

After the hammer has been drawn off to the starting position, the recurring blow is being performed. The last picture shows mode of deformation according to von Mises model after the recurring blow of the hammer has been performed.

You can see the process animated here: