A Study Of Inconel 718 Dependency On Stress Triaxiality And Lode Angle In Plastic Deformation And Ductile Fracture

Keywords

Fracture propagation modes; Lode angle; Modified Mohr-Coulomb model; Plasticity model; Stress triaxiality

Abstract

A numerical and experimental study of monotonic tensile tests on Inconel 718 with different stress states has been investigated. Focus was put to dependencies of stress triaxiality and Lode angle parameter on plastic behavior and ductile fracture. The constitutive plasticity model proposed by Bai and Wierzbicki (2008) and the modified Mohr-Coulomb (MMC) ductile fracture model (Bai and Wierzbicki, 2010) were adapted with suitable extensions. Experimental results were used to calibrate the models. By setting up parameter optimization for model calibration, the experimental results and numerical simulations were well correlated. Finally, the MMC fracture model well predicted both fracture initiation and fracture propagation modes.

Publication Date

10-1-2015

Publication Title

Engineering Fracture Mechanics

Volume

147

Number of Pages

140-157

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.engfracmech.2015.08.007

Socpus ID

84940386973 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84940386973

This document is currently not available here.

Share

COinS