Research Equipment for Damage Characterization in Structural Solids
Final rept. 1 Aug 1995-6 Jun 1996
CALIFORNIA UNIV LOS ANGELES DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
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1 Theoretical modeling of some of the problems associated with the above described topics presented a challenge. The complex nature of the geometry as well as the materials involved precluded the application of purely analytical methods for their solution. We were able to use conventional BEM for topic 2 and a hybrid form of the FEM for topic4, but these methods did not work well for the other topics. A new numerical technique, called the volume integral equation method VIEM, was developed to calculate the elastostatic as well as elastodynamic fields in structural components of large lateral extent containing localized multiple inclusions and flaws. The technique has clear advantages in accuracy and efficiency over conventional FEM and BEM in calculating the effects of local microstructure under remote loading. This is considered to be a major contribution to the literature in structural and solid mechanics. 2 A detailed study of the mechanisms for the degradation of SiCTi composites under fatigue loading was carried out leading to the following accomplishments.
- Laminates and Composite Materials