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个人信息Personal Information
副教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:力学与航空航天学院
学科:工程力学. 车辆工程. 生物与纳米力学. 应用与实验力学. 制造工艺力学. 航空航天力学与工程. 固体力学
联系方式:Email: hanxiao@dlut.edu.cn
电子邮箱:hanxiao@dlut.edu.cn
On the fracture behaviour of adhesively bonded CFRP hat-shaped thin-walled beam under axial crushing load: An experimental and modelling study
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论文类型:期刊论文
发表时间:2019-05-01
发表刊物:COMPOSITE STRUCTURES
收录刊物:SCIE、EI
卷号:215
页面范围:258-265
ISSN号:0263-8223
关键字:Crush resistance; Energy absorption; Adhesive bonding; Crack propagation; Failure mechanism
摘要:Thin-walled beams are widely adopted as the key frontal energy absorption component in automotive body. This work focused on the numerical modelling of a CFRP hat-shaped thin-walled beam under axial-crushing load, which was well validated against testing data as well as experimentally observed fracture behaviour. CFRP hat beam was manufactured with prepreg IM7/8552 through hot-press moulding, and then bonded with a base plate using structural adhesive. The adhesively bonded CFRP beam was loaded under axial crushing to investigate the fracture behaviour in CFRP as well as adhesive layer. The crushing process of CFRP beam was numerically modelled, where the strength-based Chang-Chang failure criterion was adopted to determine the fracture property of CFRP, while Tiebreak was attached in the adhesive and matrix to simulate the interfacial and interlaminar failure. Experimental work revealed that obvious interlaminar failure was observed in CFRP beam, with the outer layers curving outward and inner layers bending inward. Numerical modelling showed good agreement with the experimental data in the aspects of initial peak load and energy absorption. Based on the developed modelling technique, the fracture behaviour in CFRP beam as well as the interfacial failure in adhesive layer and composite matrix can be well predicted and evaluated.