An Incremental Mori-Tanaka Homogenization Scheme for Finite Strain Thermoelastoplasticity of MMCs

Materials

Heinz E. Pettermann¹  Christopher O. Huber²  Mathias H. Luxner²  Sergio Nogales¹ 

[1] Institute of Lightweight Design and Structural Biomechanics, Vienna University of Technology, Gusshausstr. 27-29, A-1040 Vienna, Austria; E-Mail:;Austrian Aeronautics Research (AAR), Network for Materials and Engineering, Austria

关键词: constitutive material law;    thermoelastoplasticity;    finite strain;    incremental mean field scheme;    multiscale analysis;    matrix/inclusion composites;    structural analysis;   

DOI  :  10.3390/ma3010434

来源: mdpi

【 摘 要 】

The present paper aims at computational simulations of particle reinforced Metal Matrix Composites as well as parts and specimens made thereof. An incremental Mori-Tanaka approach with isotropization of the matrix tangent operator is adopted. It is extended to account for large strains by means of co-rotational Cauchy stresses and logarithmic strains and is implemented into Finite Element Method software as constitutive material law. Periodic unit cell predictions in the finite strain regime are used to verify the analytical approach with respect to non-proportional loading scenarios and assumptions concerning finite strain localization. The response of parts made of Metal Matrix Composites is predicted by a multiscale approach based on these two micromechanical methods. Results for the mesoscopic stress and strain fields as well as the microfields are presented to demonstrate to capabilities of the developed methods.

【 授权许可】

CC BY   
© 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.