Abstract: Based on the Patran/Nastran software, the finite element models of the three types of composite laminates of intact, damaged and patched were modeled. The strength of the three types of laminated plates was estimated. By analyzing the strength values of laminated plates under different patch angles, a reasonable patch angle parameter is obtained. The strength values of the three kinds of laminated plates were obtained by tensile test. The results were compared with the results of simulation analysis. The results show that the simulation model is in good agreement with the experimental data. The results of simulation model matched with the experimental data, and the simulation model is effective to predict the residual strength of laminated plates with different repair angles.

Key words: damage, composite, finite element, patching, strength