Experimental and Numerical Studies on the Failure Mechanism of the Composite Scarf Joints with Bonding Flaws

被引:3
作者
Su, Yuru [1 ]
Guan, Zhidong [1 ]
Wang, Xin [1 ]
Wang, Xiaodong [1 ]
Li, Zengshan [1 ]
Guo, Xia [2 ]
机构
[1] Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China
[2] Beijing Ctr Phys & Chem Anal, Beijing 100094, Peoples R China
关键词
Composite scarf joints; Artificial bonding flaw; Finite element; Cohesive zone modelling; Damage tolerance design; DAMAGE TOLERANCE; SIMULATION; BEHAVIOR;
D O I
10.1007/s10443-021-09921-y
中图分类号
TB33 [复合材料];
学科分类号
摘要
Bonded composite scarf joints with bonding flaws were tested to study their tensile behaviors. Based on the failure modes obtained by various observation methods, an improved numerical methodology with appropriate model width was developed, considering the marginal low stiffness regions in +/- 45 degrees plies. The results show that the modelling approach provides accurate predictions on the strength, stiffness, and the failure modes considering variations in scarf angle, flaw size, and flaw location. Marginal low stiffness regions in +/- 45 degrees plies influence the stress distributions in the adhesive layer and the failure mode. Adhesive layer failure is the main cause of the final fracture of the pristine and the defective scarf joints, and damages within composite adherend especially interlaminar delamination, may accelerate the growth of the bondline stress at an early stage. The traditional damage tolerance design approach for bonded composite joints needs to be improved to avoid confusing and adventurous results.
引用
收藏
页码:1399 / 1425
页数:27
相关论文
共 30 条
[1]  
[Anonymous], 2013, STANDARD TEST METHOD, DOI [10.1520/D5528, DOI 10.1520/D5528]
[2]  
[Anonymous], 2019, D6671D6671M19 ASTM
[3]  
[Anonymous], 2019, D7905D7905M19 ASTM
[4]  
Archer E, 2015, WOODH PUB S COMPOS S, P393, DOI 10.1016/B978-0-85709-523-7.00014-1
[5]  
Baker A.A., 2004, Composite Materials for Aircraft Structures
[6]   Damage Detection in Composites By Artificial Neural Networks Trained By Usingin SituDistributed Strains [J].
Califano, America ;
Chandarana, Neha ;
Grassia, Luigi ;
D'Amore, Alberto ;
Soutis, Constantinos .
APPLIED COMPOSITE MATERIALS, 2020, 27 (05) :657-671
[7]  
Dassault Systemes, 2013, ABAQUS 6 13 AN US GU
[8]  
Davila CG., 2001, COLLECTION TECHNICAL, P2277
[9]   Simulation of mechanical behaviour of composite bonded joints containing strip defects [J].
de Moura, MFSF ;
Daniaud, R ;
Magalhaes, AG .
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, 2006, 26 (06) :464-473
[10]  
Federal Aviation Administration-FAA, 2010, 20107B FAA AC