Two-Parameter Crack Tip Field Associated With Stable Crack Growth in a Thin Plate-A Hybrid Analysis
Abstract
Moire interferometry was used to determine the two orthogonal displacement fields surrounding a stably growing crack in a thin 2024-T3 aluminum alloy, single-edge notched (SEN) specimen. The measured displacements were used to compute the J-integral and the associated HRR and the second order Q displacement fields. Also a 2-D elastic-plastic finite element model of the fracturing specimen was executed in its generation mode to compute the crack tip displacement field and the J-integral for small crack extension. The numerically computed and experimentally derived J-values agreed prior to crack extension but differed increasingly with stable crack growth. The HRR and measured v- displacements agreed well but significant difference between the HRR and measured u displacements was noted. Thus the Q component of the v-displacement was negligible but the corresponding u-component varied nonlinearly with radial distance from the crack tip. Ductile fracture, Moire interferometry, Stable crack growth, J-integral, HRR Field.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1993
- Accession Number
- ADA264221
Entities
People
- Albert S. Kobayashi
- F. X. Wang
- G. B. May
Organizations
- University of Washington