Computer simulation of fast crack propagation and arrest in steel plate with temperature gradient based on local fracture stress criterion
Conference
·
OSTI ID:566616
- Univ. of Tokyo (Japan). Dept. of Naval Architecture and Ocean Engineering
- Nippon Steel Corp., Nagoya (Japan). Nagoya R and D Labs.
A fracture mechanics model for fast crack propagation and arrest is proposed based on the local fracture stress criterion. Dynamic fracture toughness (K{sub D}) for a propagating crack is calculated as a function of crack velocity and temperature. The model is extended to incorporate the effect of unbroken ligament (UL) formed near the plate surfaces and crack-front-tunneling. The model simulates acceleration, deceleration and arrest of a crack in a ESSO or a double-tension test plate with temperature-gradient. Calculated arrested crack lengths compare well with experimental results. It is shown that the conventional crack arrest toughness calculated from applied stress and arrested crack length depends on temperature-gradient and the toughness is not a unique material property.
- OSTI ID:
- 566616
- Report Number(s):
- CONF-9606178--
- Country of Publication:
- United States
- Language:
- English
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