Fracture toughness for longitudinal compression failure of laminated composites at high loading rate

被引：47

作者：

He, Rui ^{[1
,2
]}

Gao, Yidi ^{[1
,2
]}

Cheng, Longfei ^{[1
,2
]}

Cui, Hao ^{[1
,3
,4
]}

Li, Yulong ^{[1
,3
,4
]}

机构：

[1] Northwestern Polytech Univ, Shaanxi Key Lab Impact Dynam & Its Engn Applicat, Xian 710072, Shaanxi, Peoples R China

[2] Northwestern Polytech Univ, Sch Aeronaut, Xian, Peoples R China

[3] Northwestern Polytech Univ, Sch Civil Aviat, Suzhou, Peoples R China

[4] NPU Yangzi River Delta Res Inst, Suzhou, Jiangsu, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2022年 / 156卷

基金：

中国国家自然科学基金;

关键词：

A; Laminates; B; Fracture toughness; C; Damage mechanics; Polymer-matrix composites (PMCs); FIBER-REINFORCED COMPOSITES; MODE-I; POLYMER COMPOSITES; RESISTANCE CURVES; CRACK; PROPAGATION; MECHANISMS; BEHAVIOR; KINKING;

D O I：

10.1016/j.compositesa.2022.106834

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dynamic fracture toughness of laminated composites in fibre kinking mode, and its evolution with crack growth, is characterized in this paper at high loading rate. The compact compression specimen was loaded with electromagnetic Hopkinson bars at a velocity of up to 3.5 m/s. The measured surface displacement/strain fields with digital image correlation were analysed with the J-integral method, and energy dissipation during initiation and propagation of fibre kinking band was obtained at different loading rates. The fracture toughness at the initiation of fibre kinking damage remains constant in all tests, while during kinking band growth stage, it has been found to decrease noticeably at higher loading rate. Two different types of damage evolution have been observed in this study depending on the amount of delamination involved, as delamination can lead to a rapid drop of loading capacity, and results in relatively low fracture toughness after kinking band formation.

引用

页数：11

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