Moire for Dynamic Fracture.
Abstract
Geometric Moire and Moire interferometry were used to record the orthogonal displacement fields surrounding stably and rapidly propagating cracks in thin aluminum fracture specimens. The J- and T*-integral values were computed directly, for the first time, from the displacement data. J and T* were also obtained from static/dynamic, elastic-plastic finite element simulations of the fracture tests. While the ASTM far-field J increased, the near-field J precipitously dropped to zero with crack extension. The popular HRR elastic-plastic crack tip field also collapsed with crack extension. In contrast, the near-field T* reached a steady state value with crack extension and was found to be a suitable fracture parameter for characterizing stable and rapid crack growth and arrest.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 20, 1996
- Accession Number
- ADA312780
Entities
People
- Albert S. Kobayashi
Organizations
- University of Washington