FRACTURE INITIATION IN PLANE DUCTILE FRACTURE PROBLEMS: AN ELASTIC-PLASTIC FINITE ELEMENT INCREMENTAL ANALYSIS.

Satya N. Atluri, M. Nakagaki, W. H. Chen

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

A rigorous elastic-plastic finite element analysis is presented to analyze in-service situations of ductile fracture problems. A finite-deformation analysis is used to account for finite geometry changes near the crack-tip. Strain and stress singularities near the crack-tip for strain-hardening materials, of the Hutchinson-Rice-Rosengren type are embedded in finite elements near the crack-tip. A hybrid-displacement finite element model is used to enforce continuity of displacements and tractions between elements. Using the developed procedure, two fracture test speciments, of 3-point bend and compact tension type, made of Ni-Cr-Mo-V steel and A533B pressure vessel steel are analyzed. The computed results are compared with available experimental results of the same specimens. The computed data is analyzed with special attention to the use of the J-integral and crack-opening displacement as ductile fracture criteria and some conclusions from the present study, pertinent to fracture initiation under large-scale yielding conditions, are presented.

Original languageEnglish
Pages579-591
Number of pages13
StatePublished - 1977
EventUnknown conference - Tokyo, Jpn
Duration: Apr 19 1977Apr 22 1977

Conference

ConferenceUnknown conference
CityTokyo, Jpn
Period04/19/7704/22/77

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