Modified mode I fracture toughness calculation method for composite laminate with large scale fiber bridging

被引：1

作者：

Duan, Qingfeng ^{[1
,2
,3
]}

Hu, Haixiao ^{[1
,2
,3
]}

Cao, Dongfeng ^{[1
,2
]}

Cai, Wei ^{[1
,2
]}

Xia, Junkang ^{[1
,2
]}

Li, Shuxin ^{[1
,2
,3
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Foshan Xianhu Lab, Natl Energy Key Lab New Hydrogen ammonia Energy Te, Foshan 528000, Peoples R China

[3] Wuhan Univ Technol, Sch Sci, Hubei Key Lab Theory & Applicat Adv Mat Mech, Wuhan 430070, Peoples R China

来源：

COMPOSITE STRUCTURES | 2024年 / 349卷

基金：

中国国家自然科学基金;

关键词：

Composite; Fracture toughness; Fiber bridging; Mode I delamination; DELAMINATION GROWTH; BEAM MODEL; ANGLE; MECHANICS; FAILURE;

D O I：

10.1016/j.compstruct.2024.118521

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Experimental investigation and theoretical analysis have been carried out in this study to assess the application limitation of the current ASTM D5528 method for Mode I fracture toughness calculation of composite laminate with fiber bridging. It is revealed that additional toughening effect introduced by the fiber bridging is not fully considered in the current method and consequently there are uncertainties associated with the fracture toughness calculated by the current ASTM method. Based on the same principle used in the development of the original ASTM method, a modified method is proposed to extend the applicability of the current method. The modified method is verified with mechanisms based cohesive zone modelling and numerical simulations of the Mode I delamination double cantilever beam tests. The significant improvement of the prediction results compared with experimental results by the modified method over the current method demonstrated its applicability for Mode I delamination fracture toughness calculation of composite laminates with large scale fiber bridging.

引用

页数：14

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