VERIFICATION OF LS-DYNA MATERIALS USING SIMPLISTIC REPRESENTATIVE MODEL

Verification and Validation is the largest area within software quality assurance activities. Verification provides evidence or substantiation, that a mathematical model is solved correctly by the computer code being assessed. Validation is the process of determining the degree to which a model is an accurate representation of the real world from the perspective of the intended uses of the model. To successfully simulate a regulatory drop test, the mathematics (verification) and the physics (validation) of the model must provide an accurate representation of the actual package. As with all physics based computer codes, the accuracy of LS-DYNA is dependent on the material properties and proper use of the material models. A component study that demonstrates correct performance of a block, representative of honeycomb or another crushable material was performed and compared with laboratory and drop test data to provide reasonable assurance that the material model provides correct structural response. In summary, the simplified model was used to show that the input stress-strain curves resulted in accurate stress output. This paper provides procedures for verifying and validating the accuracy of LS-DYNA material models.