213 Prediction of the Whole Stress-strain Curve and Final Composite Strength of GFRP Cross-ply Laminates

概要

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The strength prediction of the composite laminates is necessary for the engineering application. In predicting the strength of the arbitrary lay-up laminates, the interaction between the fiber failure and the ply cracks is critical. Therefore, the advanced micro-mechanical models considering the ply cracks and the fiber failures should be established. The present study investigates experimentally the microscopic damage evolution of glass fiber reinforced polymer (GFRP) cross-ply laminates and predicts the stress-strain relation up to failure using the statistical simulation. Especially, a new numerical model based on the finite element method and the Monte Carlo simulation is proposed and the fiber breakage is coupled with the matrix cracks in the 90-degree plies in this model. Concerning the matrix cracks, the present model utilizes the experimental results obtained from the replica observations. The simulated results have a good agreement with the experimental results and it is found that the present model can predict the micro mechanical damage process of GFRP.
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