Effect of 0°-layers ratio on the dynamic fracture toughness of longitudinal compression failure of CFRP laminates

被引：1
作者：
Zhang, Zhuo [1 ]
Zhang, Kai [1 ]
Zhang, Gang [2 ]
Zheng, Bailin [1 ]
机构：
[1] Tongji Univ, Sch Aerosp Engn & Appl Mech, Shanghai 200092, Peoples R China
[2] AECC Commercial Aircraft Engine Co Ltd, Shanghai 201100, Peoples R China
来源：
THIN-WALLED STRUCTURES | 2025年 / 208卷
关键词：
Mechanical testing; CFRP; Fracture toughness; Strain-rate effect; MODE; COMPOSITES; TENSILE;
D O I：
10.1016/j.tws.2024.112766
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The influence of layups on longitudinal compressive fracture toughness of CFRP laminates under quasi-static and high-rate loading conditions was studied in this paper. Three kind layups of laminates were compressed at speeds of 0.001 m/s, 5.7 m/s and 13.7 m/s with a universal test machine and electromagnetic Hopkinson bars. Surface displacement and strain of the specimen are recorded by digital image correlation systems and dynamic J integral was determined with the equivalent integral region method. The J-integral for longitudinal compression at crack initiation increases with an increasing proportion of the 0 degrees-layer, attributed to enhanced interaction between fibers and the matrix. However, the fiber compressive fracture toughness exhibits negligible variation with loading rate when the proportion of the 0 degrees-layer is small. In contrast, it decreases with increasing loading rate when the proportion is high.
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页数：11
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