Fracture toughness determination and mechanism for mode-I interlaminar failure of 3D-printed carbon-Kevlar composites

被引：25
作者：
Dang, Zhilong [1 ]
Cao, Junchao [1 ]
Pagani, Alfonso [2 ]
Zhang, Chao [1 ,3 ]
机构：
[1] Northwestern Polytech Univ, Sch Aeronaut, Dept Aeronaut Struct Engn, Xian 710072, Shaanxi, Peoples R China
[2] Politecn Torino, Dept Mech & Aerosp Engn, Mul2 Lab, Turin, Italy
[3] Northwestern Polytech Univ, Sch Civil Aviat, Xian 710072, Shaanxi, Peoples R China
来源：
COMPOSITES COMMUNICATIONS | 2023年 / 39卷
基金：
中国国家自然科学基金;
关键词：
Additive manufacturing; Interlaminar fracture toughness; Kevlar fiber; Hybrid fiber interface; Fiber bridging; DELAMINATION GROWTH; R-CURVE;
D O I：
10.1016/j.coco.2023.101532
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Additive manufacturing for continuous fiber composite exhibits great potential for the fabrication of sophisti-cated structural components. Nevertheless, interlaminar characteristics of printed parts have remained an open research question. This study aims to evaluate the mode-I interlaminar fracture property of 3D-printed contin-uous fiber reinforced composites with different interlaminar interfaces adopting carbon and Kevlar fiber. Three different double cantilever beam (DCB) configurations are considered, including carbon/carbon, Kevlar/Kevlar and carbon/Kevlar hybrid interface. It is observed that the interlaminar failure of carbon fiber was seriously affected by the void defects caused by 3D-printed. It is further found that Kevlar fiber could greatly improve the interlaminar fracture toughness attributed to the better bonding of interlayers and the denser bridging fiber. Finally, a novel idea for the hybrid interface is provided based on the characterization study of the carbon-Kevlar composites.
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页数：6
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