The effects of size and stacking sequence of composite laminated patch on bonded repair for cracked hole |
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Authors: | Ching-Hwei Chue Wen-Ching Chou Thomas Jin-Chee Liu |
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Affiliation: | (1) Department of Mechanical Engineering, National Cheng-Kung University, Tainan, Taiwan, Republic of China |
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Abstract: | The performance of a bonded repair for cracked holes has been studied using the three dimensional finite element method, linear elastic fracture mechanics and strain energy density theory. Increasing the composite patch size reduces the strain energy level at the crack tip; increasing the patch length normal to the crack is a better choice. The stacking sequences of the laminated patch have little influence on the strain energy distribution in the vicinity of the crack. To repair the cracked holes of aircraft components subjected to variable direction loading during flight, the orientations of the patch ply, 90° and ±45° with respect to the crack direction, are the optimum selection in bonded repairs. |
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Keywords: | bonded repair cracked hole laminated patch patch size stacking sequence strain energy density theory |
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