Analysis of triaxial testing using a fracture damage model
Triaxial test configurations typical of those commonly used for rock were analyzed using a new damage model implemented in a finite element program. The model incorporates the effects of damage on material behavior due to the nucleation, growth and coalescence of microcracks during compressive loading. The calculations show that end effects, due to the constraint of the endcaps, heavily influences the deformation as the maximum load is approached. In the post-failure, softening regime, the calculations predict a localization of microcracking into larger fractures which result in axial splitting or slabbing in uniaxial tests or shear fault formation in triaxial tests. The analysis is shown to be in agreement with experimental results. 15 refs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5824799
- Report Number(s):
- SAND-86-0079C; CONF-860682-3; ON: DE86009090
- Country of Publication:
- United States
- Language:
- English
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