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User subroutines

Fracture in toolIn QForm V8 software users may define functions with Lua programming language. For instance we can describe various tool fracture models with Lua. The figure on the right is a photograph of a real die set failure, and in the figure below is the definition and programming code of Cockroft & Latham fracture criterion, which is implemented for prediction of danger zones within the tool. Simulation results using this criterion show maximum values of fracture in the same area that corresponds to the real failure.

Distribution of calculated parameters by Cockroft-Latham fracture criterionDefinition and realization of the integral

The video below shows simulation of coupled deformation of an assembled tool. The first half of the video shows plastic strain distribution in the workpiece, and the second half shows effective stress field in the tool.