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Characterizing plasticity material models using data from test


It is common to perform a uni-axial tensile test on a material sample to generate stress-strain curve for use in numerical models in LS-DYNA. The problem frequently encountered by analysts is the cleaning of the test data that is usually noisy. I recently wrote a small Python utility that takes any test generated force-deflection curve that does auto cleaning and generate a effective stress vs effective plastic strain curve for use in any plasticity models directly in LS-DYNA.

Below are some images showing the original and smoothed data.

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