Validation of the material point method and plasticity with Taylor impact tests

TL;DR

This paper validates the material point method and various plasticity models by simulating Taylor impact tests at different temperatures, comparing numerical results with experimental data to assess accuracy.

Contribution

It introduces a comprehensive simulation framework for Taylor impact tests using the material point method and evaluates multiple plasticity models against experimental results.

Findings

Material point method accurately simulates Taylor impact tests.

Different plasticity models show varying levels of agreement with experiments.

High temperature tests validate the models' applicability at elevated conditions.

Abstract

Taylor impacts tests were originally devised to determine the dynamic yield strength of materials at moderate strain rates. More recently, such tests have been used extensively to validate numerical codes for the simulation of plastic deformation. In this work, we use the material point method to simulate a number of Taylor impact tests to compare different Johnson-Cook, Mechanical Threshold Stress, and Steinberg-Guinan-Cochran plasticity models and the vob Mises and Gurson-Tvergaard-Needleman yield conditions. In addition to room temperature Taylor tests, high temperature tests have been performed and compared with experimental data.