Linear-Nonlinear Interface for Finite Element Impact Analysis

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Abstract
A method is presented for interfacing a nonlinear, explicit finite element structural model with a linear finite element representation. The interfacing procedure allows local nonlinear modelling of a predominantly linear structural response. Conditional stability of the linear-nonlinear interface procedure is established. Very good correlations between test and analysis are shown for two test cases. Run time reductions of up to seventy percent over conventional techniques are demonstrated.

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