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.
|Number of pages||13|
|State||Published - Jan 1 1977|
|Event||Unknown conference - Tokyo, Jpn|
Duration: Apr 19 1977 → Apr 22 1977
|Period||04/19/77 → 04/22/77|