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首页> 外文期刊>Composite Structures >Integrated experimental screening of bonded composites patch repair schemes to notched aluminum-alloy panels based on static and fatigue strength concepts
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Integrated experimental screening of bonded composites patch repair schemes to notched aluminum-alloy panels based on static and fatigue strength concepts

机译：基于静态和疲劳强度概念的粘结复合材料修补程序对缺口铝合金面板的集成实验筛选

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摘要

This paper seeks to outline an experimental screening procedure for a bonded composites patch repair scheme for cracked aluminum-alloy panels based on static and fatigue strength concepts. The materials used in this investigation comprised LY12 aluminum-alloy as a substrate, SY-24C as the adhesive system and T300/3234, G803/3242 and SW220/2322 fibre/epoxy prepregs as the patch materials. Static and fatigue behaviour of the specimens with serious patch materials and thicknesses was investigated experimentally. The experiments showed that the effects of repair of a notched panel with an asymmetric composite patch on the static strength and fatigue life of the repaired panel vary depending on the thicknesses of the patch and the fibre/epoxy prepreg materials. Because of the reduction of stress concentration caused by repairing, there is an improvement in the residual strength of the repaired specimens; thus the tensile residual strengths of repaired specimens are greater than those of un-repaired notched specimens.
机译：本文旨在概述一种基于静态和疲劳强度概念的裂纹铝合金面板粘合复合材料修补程序的实验筛选程序。本研究中使用的材料包括LY12铝合金作为基材，SY-24C作为粘合剂体系以及T300 / 3234，G803 / 3242和SW220 / 2322纤维/环氧树脂预浸料作为贴剂。实验研究了具有严重补片材料和厚度的试样的静态和疲劳行为。实验表明，用不对称复合补片修复缺口面板对修复面板的静态强度和疲劳寿命的影响随补贴和纤维/环氧预浸材料的厚度而变化。由于修复引起的应力集中减小，因此修复后的试样的残余强度得到了改善。因此，修复后的试样的拉伸残余强度大于未修复的缺口试样的残余拉伸强度。

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