An Anisotropic and Asymmetric Material Model for Simulation of Metals Under Dynamic Loading
-
2016-11-01
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
DOI:
-
Resource Type:
-
Geographical Coverage:
-
Contracting Officer:
-
Corporate Publisher:
-
Abstract:The purpose of this research is to develop a fully-tabulated, anisotropic, asymmetric, strain rate, and temperature dependent material model for solid finite elements. Physical testing of several metallic materials has shown them to have anisotropic (or orthotropic) characteristics. While many material models in finite element codes currently have anisotropic options, they tend to focus on material forming applications – not crash and impact analysis. Unlike most available anisotropic forming material models, this model includes: rate dependency, temperature dependency, tabulated hardening (as opposed to parameterized inputs), mesh regularization, and can be utilized with three-dimensional solid elements. The implementation of this anisotropic model is an extension of the currently existing Generalized Yield Surface (GYS) variant of the Tabulated Johnson-Cook material model. This new model builds upon the previously available features of both of these well-established material models. Strain rate and temperature dependencies are utilized as independent tabulated values. Yield curves for tension, compression and shear are also tabulated and independent. Isotropic failure is retained from the Tabulated Johnson-Cook model as a function of triaxiality, Lode parameter, strain rate, temperature and element size.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type: