The formation of a yield-surface vertex in rock
Conference
·
OSTI ID:5528462
Microstructural models of deformation of polycrystalline materials suggest that inelastic deformation leads to the formation of a corner or vertex at the current load point. This vertex can cause the response to non-proportional loading to be more compliant than predicted by the smooth yield-surface idealization. Combined compression-torsion experiments on Tennessee marble indicate that a vertex forms during inelastic flow. An important implication is that strain localization by bifurcation occurs earlier than predicted by bifurcation analysis using isotropic hardening.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5528462
- Report Number(s):
- SAND-92-0008C; CONF-920634-8; ON: DE92006809
- Resource Relation:
- Conference: 33. US symposium on rock mechanics, Santa Fe, NM (United States), 8-10 Jun 1992
- Country of Publication:
- United States
- Language:
- English
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