On the Theory of Materials with Permanent Memory.
UTAH UNIV SALT LAKE CITY DEPT OF CIVIL ENGINEERING
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A mechanical theory of materials that possess the ability to undergo microstructural damage is developed in this study. Damage is regarded as a primitive concept and its defining properties are stated. In general, a second order linear transformation is required to describe the state of damage at a given material particle. A constitutive theory wherein damage is related to the deformation gradients histories and stress is related to the past states of deformation and damage is developed in accordance with the theory of simple materials. Topological structures are developed for both constitutive relationships and first order approximations obtained. These structures are of the same general form as those occurring in the theory of fading memory materials such as certain highly filled polymeric matrix solid rocket propellants.
- Solid Rocket Propellants