The effect of off-axis angles on the mesoscale deformation response and failure behavior of an orthotropic textile carbon-epoxy composite

被引：17
作者：
Yang, Jishen [1 ]
Yang, Xiaoguang [1 ,3 ,4 ]
Zhu, Hanxing [2 ]
Shi, Duoqi [1 ,3 ]
Chen, Xindong [2 ]
Qi, Hongyu [1 ,3 ]
机构：
[1] Beihang Univ, Sch Energy & Power Engn, Beijing 100191, Peoples R China
[2] Cardiff Univ, Sch Engn, Cardiff CF24 3AA, S Glam, Wales
[3] Collaborat Innovat Ctr Adv Aeroengine, Beijing 100191, Peoples R China
[4] Nanchang Hangkong Univ, Nanchang 330063, Jiangxi, Peoples R China
来源：
COMPOSITE STRUCTURES | 2018年 / 206卷
关键词：
Textile composites; Off-axis tension; Digital image correlation (DIC); Deformation response; Failure strength; Fracture morphology; FIBER-REINFORCED COMPOSITE; DIGITAL IMAGE CORRELATION; SATIN WEAVE COMPOSITE; 2D WOVEN COMPOSITES; STRAIN LOCALIZATION; MECHANICAL-BEHAVIOR; DAMAGE ANALYSIS; LOCAL DAMAGE; TENSION;
D O I：
10.1016/j.compstruct.2018.08.010
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The deformation response and failure behavior of an orthotropic textile carbon-epoxy composite were investigated under off-axis tensile loading. Digital image correlation (DIC) was utilized to effectively capture the full-field and mesoscale strain distribution. The macroscale mechanical performance was strongly sensitive to the fiber bundles orientation relative to the loading direction. Based on the experimental data, a quantitative relation between the rotation angle and off-axis angle was established, and a negative correlation between the failure strength and the rotation angle was observed. The underlying failure mechanisms of the specimens with different off-axis orientations were analyzed using scanning electron microscopy (SEM) and DIC techniques. The load-bearing mechanisms were different between the on- and off-axis cases. High local shear strain eventually resulted in the brushy shear-type fracture in the off-axis case, and the local micro cracks developed during the loading caused the reduction and imbalance of local load-bearing capacity.
引用
收藏
页码：952 / 959
页数：8
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