Treatment of anisotropic damage development within a scalar damage formulation
- Southwest Research Inst., San Antonio, TX (United States)
- Southwest Research Inst., San Antonio, TX (United States); Technion-Israel Inst. of Tech., Haifa (Israel). Dept. of Mechanical Engineering
- Sandia National Labs., Albuquerque, NM (United States)
This paper is concerned with describing a damage mechanics formulation which provides for non-isotropic effects using a scalar damage variable. An investigation has been in progress for establishing the constitutive behavior of rock salt at long times and low to moderate confining pressures in relation to the possible use of excavated rooms in rock salt formations as repositories for nuclear waste. An important consideration is the effect of damage manifested principally by the formation of shear induced wing cracks which have a stress dependent orientation. The analytical formulation utilizes a scalar damage parameter, but is capable of indicating the non- isotropic dependence of inelastic straining on the stress state and the confining pressure. Also, the equations indicate the possibility of volumetric expansions leading to the onset of tertiary creep and eventually rupture if the damage variable reaches a critical value.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 405755
- Report Number(s):
- SAND--96-1318C; CONF-9606285--1; ON: DE96013950
- Country of Publication:
- United States
- Language:
- English
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