Investigation and Modeling of Damage Growth in Composite Laminates.
Final rept. 1 Jan-31 Dec 88,
VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG MATERIALS RESPONSE GROUP
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Damage initiation and growth has been studied in several material systems and two notched geometries, revealing generic characteristics of damage development and its relationship to microstructure. Stress redistribution has been studied with photoelastic methods and simulated analytically. Adiabatic thermoelastic methods for strain field analysis under dynamic loading have been developed and the first micromechanical formulation of that problem has been achieved. A formulation of the singular stress problem in the boundary layer near a hole in composite laminates has been completed. And a brief study of the applicability of chaos theory to damage development representation was conducted. A critical element model of remaining strength and life of notched laminates has been constructed and validated.
- Laminates and Composite Materials