Mechanical Engineering Faculty Research

Title

Effects of the Stress State on Plasticity and Ductile Failure of an Aluminum 5083 Alloy

Document Type

Article

Publication Date

Winter 12-2009

Abstract

The experimental and numerical work presented in this paper reveals that stress state has strong effects on both the plastic response and the ductile fracture behavior of an aluminum 5083 alloy. As a result, the hydrostatic stress and the third invariant of the stress deviator (which is related to the Lode angle) need to be incorporated in the material modeling. These findings challenge the classical J2 plasticity theory and provide a blueprint for the establishment of the stress state dependent plasticity and ductile fracture models for aluminum structural reliability assessments. Further investigations are planned to advance, calibrate and validate the new plasticity and ductile fracture models.

Publication Title

International Journal of Plasticity

Volume

25

Issue

12

First Page

2366

Last Page

2382