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首页> 外文会议>AIAA/ASCE/AHS/ASC structures, structural dynamics and materials conference;AIAA SciTech Forum >Prediction of Damage Tolerance in Metallic Structure Repaired with a Co-Cured Composite Patch
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Prediction of Damage Tolerance in Metallic Structure Repaired with a Co-Cured Composite Patch

机译：共固化复合材料修补金属结构修复损伤容忍度的预测

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摘要

An integrated framework is demonstrated to predict the damage tolerance of co-cure bonded quasi-isotropic E-glass/epoxy composite patch repair of aluminum plate. In order to accurately simulate the progressive damage in the composite repair structure, this paper develops a detailed 3D finite element model and validates the model with the four-point bending tests. The energy absorption analysis indicates that the shear plasticity of the composite patch is the most important contributor to the energy absorption of the patch. The global sensitivity study using Sobol indices method identifies the most influential material properties on the energy absorption capability of the patched structure, including the intralaminar fracture toughness, the shear strength and maximum shear plastic strain of laminates, and the interlaminar fracture energy release rate.
机译：证明了一个集成的框架可以预测铝板共固化键合准各向同性E-玻璃/环氧树脂复合贴片修复的损伤容忍度。为了准确地模拟复合材料修复结构中的渐进式损伤，本文开发了详细的3D有限元模型，并通过四点弯曲测试对模型进行了验证。能量吸收分析表明，复合补片的剪切可塑性是补片吸收能量的最重要因素。使用Sobol指数方法进行的全球敏感性研究确定了对修补结构的能量吸收能力影响最大的材料属性，包括层内断裂韧性，层压板的剪切强度和最大剪切塑性应变以及层间断裂能释放率。

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