WIT Press


Constitutive Modeling Of Functionally Graded Material And Its Application To Fracture In FGM

Price

Free (open access)

Paper DOI

10.2495/LD960541

Volume

13

Pages

8

Published

1996

Size

852 kb

Author(s)

M. Nakagi, Y. Wu, Y. Shibata & S. Hagihara

Abstract

An analytical methodology is shown for studying a crack in a functionally graded material subjected to an intense thermal shock load. A theoretical elastoplastic material modeling of the functionally graded material is presented. Also independently a computational procedure of an elastoplastic constitutive law is introduced with the use of a micromecnanics analysis and a hierarchical neural network algorithm. The material is composed of ZrO^ and 77-6A/-4V, where the plastic flow is considered to occur in the titanium alloy phase. To detect the crack-tip fracture severity in the highly inhomogeneous media, r*integral parameter is employed for the thermal shock problem of the cracked material. Introduction In high temperature technology, multi-material

Keywords