基于CDM-CZM的复合材料补片补强参数分析

doi:CNKI:11-1929/V.20111011.1411.007

Abstract

Abstract: It is of engineering significance to determine the parameters of reinforcement design of notched composite laminates. In order to understand the influence of these parameters on the structure strength and damage propagation, a three-dimension anisotropic continuum damage model (CDM) is developed to describe the onset and damage evolution in a notched composite laminate under tensile loading condition. A cohesive zone model (CZM) is used to simulate the damage evolution of an adhesive material between the notched composite laminate and the patched reinforcement structure. Good agreement is obtained between the numerical and the experimental results. Based on the validated model, three main parameters for reinforcement design are discussed, i.e., the lay-up configuration, patch thickness and radius of patch reinforcement. Furthermore, the delamination of the adhesive layer between the laminate and the patch is found to be the primary reason for the final failure of the reinforced structure.

Key words: composite materials, continuum damage model, cohesive zone model, notched structure, reinforcement, strength

CLC Number:

V214.8

YAO Liaojun, ZHAO Meiying, WAN Xiaopeng. Parameter Analysis of Composite Laminates with Patched Reinforcement Based on CDM-CZM[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, (4): 666-671.

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Parameter Analysis of Composite Laminates with Patched Reinforcement Based on CDM-CZM

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