Three dimensional finite element analysis of failure in composite laminates
A compact finite element formulation based on singularity transformation is presented and is used to analyze the mathematical nature of stress singularities at the boundary layer in laminated composites. The stress singularities depend on material properties of adjacent laminae and local boundary conditions. For illustration, results from few elements are shown to demonstrate the accuracy and efficiency of the present approach. Excellent agreement between these results and the analytical solutions is obtained. Next, three dimensional elastic response of laminated composites to thermomechanical loading is formulated and analyzed using the finite element method. Individual laminae are modeled as homogeneous and transversely isotropic. Particular attention is given to the interlaminar stresses near free edges. Three-dimensional intralaminar and interlaminar failure criteria of unidirectional fiber composites are established. The three-dimensional finite element analysis in conjunction with the intralaminar and interlaminar failure criteria is developed to analyze the failure behavior of laminated composites with free edge.
- Research Organization:
- Rensselaer Polytechnic Inst., Troy, NY (USA)
- OSTI ID:
- 6972537
- Country of Publication:
- United States
- Language:
- English
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