Effects of mixed-mode ratio and step-shaped micro pattern surface on crack-propagation resistance of carbon-fiber-reinforced plastic/adhesive interface
Effects of mixed-mode ratio and step-shaped micro pattern surface on crack-propagation resistance of carbon-fiber-reinforced plastic/adhesive interface
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DOI：
10.1016/j.compositesa.2014.11.014
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发表时间：
2015-02
影响因子：
8.7
通讯作者：
Y. Yukimoto;R. Matsuzaki;A. Todoroki
中科院分区：
文献类型：
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作者：
Y. Yukimoto;R. Matsuzaki;A. Todoroki
本文研究了复合载荷比（GII/G）和阶梯形微图案的纵横比（A）对模内表面改性制备的碳纤维增强塑料（CFRP）/胶粘剂界面裂纹扩展阻力的影响。实验表明，GII/GandA的加入改变了复合材料的断裂行为，使复合材料的表观断裂韧性GC增加。我们使用Benzeggagh-Kenane（B-K）的破坏准则的混合模式断裂韧性，考虑到过渡的破坏模式的阶梯形的微观图案。B-K准则与GC的改进一致，这是由于在不同的A固定值下，GII/G增加。本文阐明了长宽比A与描述B-K判据所需的参数η之间的关系，从而可由A估算出η。从而验证了将η-A关系代入B-K准则中，可以预测任意GII/Ganda值的CFRP/胶粘剂界面台阶状微图案的GC。
This study investigated the effects of the mixed-mode ratio of applied loads (GII/G) and aspect ratioAof step-shaped micro patterns on the crack-propagation resistance of a carbon-fiber-reinforced plastic (CFRP)/adhesive interface fabricated by in-mold surface modification. Experiments showed that the fracture behaviors change and that the apparent mixed mode fracture toughnessGCincreases withGII/GandA. We used the Benzeggagh–Kenane (B–K) failure criterion for the mixed-mode fracture toughness considering the transition of the failure mode of the step-shaped micro patterns. The B–K criterion agreed well with the improvement ofGCdue to an increase inGII/Gfor various fixed values ofA. We clarified the relationship between the aspect ratioAand the parameterη, which is required to describe the B–K criterion, and therefore,ηcan be estimated fromA. Consequently, it was verified thatGCof the CFRP/adhesive interface with step-shaped micro patterns can be predicted for arbitraryGII/GandAvalues by substituting theη–Arelationship in the B–K criterion.