Experimental Investigation of Stitched Composite Laminates Subjected to In-plane Edge Impact and Compression After Impact
LI Meiyan1, LAI Jiamei1,*, MO Mingzhi1, LUO Zhiqiang1, HUANG Zhichao2
1 Polymer Processing Research Laboratory, School of Mechanical and Electric Engineering, Nanchang University, Nanchang 330031, China 2 Key Laboratory for Conveyance and Equipment of the Ministry of Education, East China Jiaotong University, Nanchang 330013, China
Abstract: Stitched and unstitched carbon fiber reinforcedplastic (CFRP) laminates were manufactured by the vacuum assisted resin transfer molding(VARTM) technique and subjected to in-plane edge impact and compression after impact under five different energies. The damage after edge impact inside the structure was detected by the ultrasonic C-scan method. The experimental results show that stitching can improve the edge-impact resistance and damage tolerance of the laminates effectively. Within the impact energy range tested, the peak impact force increased by 4.54%～10.33% and the maximum increase of the residual compressive strength after impact was 9.32%. In addition, through the result from ultrasonic C-scan, it is found that there was a semi-elliptical delaminated damage area near the impact edge on the composite plates after in-plane edge impact of the structures, and the damage area of the stitched laminates was significantly smaller than that of unstitched. The main compression failure mode after in-plane edge impact of the unstitched laminates was delamination propagation, while the stitched laminates was global buckling.
李美艳, 赖家美, 莫明智, 罗志强, 黄志超. 缝合复合材料层板面内边缘冲击及冲击后压缩实验[J]. 材料导报, 2022, 36(23): 21050254-6.
LI Meiyan, LAI Jiamei, MO Mingzhi, LUO Zhiqiang, HUANG Zhichao. Experimental Investigation of Stitched Composite Laminates Subjected to In-plane Edge Impact and Compression After Impact. Materials Reports, 2022, 36(23): 21050254-6.
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2022, Vol. 36 
