Anti-impact performance of plain woven composite patching structure based on multi-scale analysis

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (19) : 188-197.

PI Xiaofan, TIE Ying, HU Minghao

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Abstract

Since the plain woven composite repaired structure has a multi-scale effect on the response of impact loading, a numerical model was built using a multi-scale approach to compare the differences of impact response between plain woven composite repaired structure and unidirectional composite repaired structure. And the damage evolution at different impact energies and the effect of patch shape on the impact resistance were also studied. At first, the microscale model of fiber yarn and the representative volume element (RVE) were developed to predict the mesoscale material properties. Then the effective macroscale cross-ply laminate (ECPL) model of the plain woven composite structure was further obtained by using local homogenization method, ECPL). And then a multi-scale model was established to analysis the damage evolution of the plain woven composite repaired structure. The damage evolution of the repaired structure during the impact was analyzed by using the continuous damage mechanics model and the 3D Hashin criterion, and the accuracy of the numerical model was verified by the force-energy curves obtained from the drop hammer impact test. The numerical and the experimental results show that the plain woven repaired structure had better impact resistance than the unidirectional repaired structure; the impact damage of plain woven repaired structure was mainly distributed along 0/90 direction, and the main load-bearing part was transferred from the patch to the parent plate with the increase of the impact energy; the cohesive layer started to fail at the impact energy of 12 J; the plain woven composite structure repaired by the circle patch showed better impact resistance performance than others.
Key words: plain woven composite; external repair; damage evolution; patch shape; impact resistance

Key words

plain woven composite / external repair / damage evolution / patch shape / impact resistance

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PI Xiaofan, TIE Ying, HU Minghao. Anti-impact performance of plain woven composite patching structure based on multi-scale analysis[J]. Journal of Vibration and Shock, 2022, 41(19): 188-197

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