Modeling Considerations in the Prediction of Residual Strength in Composite Laminates,
ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE
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The prediction of residual strength in damaged composite structures is complicated by the need to accurately characterize internal damage states and to mathematically simulate the material behavior which displays a variety of damage mechanisms and failure modes. Numerous analyses have been developed which, in general, have been restricted to specific damage modes and idealized geometric configurations. Modeling issues include micromechanical fibermatrix failure phenomena, delamination growth, buckling of laminate sublayers and nonlinear material and geometric response to applied loads. For the reliable design of composite components, the modeling approaches utilized in various specialized analyses need to be synthesized into a combined, robust methodology. The purpose of the present investigation is to identify the various salient failure phenomena involved in damaged composite laminates and to discuss mathematical modeling approaches to represent such damage. The identification of analytic approaches provide a basis for further extension to overcome existing limitations in the prediction of residual strength.
- Laminates and Composite Materials
- Numerical Mathematics