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Numerical simulation of compressive failure of carbon-fiber-reinforced plastic laminates with various hole shapes
Advanced Composite Materials ( IF 2.9 ) Pub Date : 2020-06-25 , DOI: 10.1080/09243046.2020.1783077
Satoko Shimizu 1 , Mio Sato 1 , Jun Koyanagi 2 , Hiroshi Suemasu 3 , Yasuo Kogo 2
Affiliation  

The effect of stress concentration on the compressive failure behavior of a carbon fiber composite laminate with an open hole is experimentally and numerically studied. The aspect ratio of the elliptical hole is varied to investigate the dependence of the failure behavior on the stress concentration. A finite-element analysis is implemented using ABAQUS 2017, and a dynamic explicit solving method is adopted. Continuum shell elements incorporating Hashin’s failure criteria and cohesive interaction, which is a combined function of a general contact definition and cohesive traction-separation law, are used to model the damage growth of a lamina and interlaminar, respectively. The damage initiations are defined by critical stresses, and damage evolutions are defined by energy assumptions of softening behavior for continuum shell elements and cohesive interaction. The numerical results of the stresses at initial damage occurrences and ultimate failures agree well with the experimental results for the specimens with various aspect ratios. In addition, the numerical and experimental results of the damage behavior of the 0° ply are in good agreement. Internal damage and delamination behavior that are difficult to observe in experiments are also discussed based on the numerical results.

中文翻译:

不同孔型碳纤维增强塑料层合板压缩破坏的数值模拟

应力集中对开孔碳纤维复合材料层压板压缩破坏行为的影响进行了实验和数值研究。改变椭圆孔的纵横比以研究破坏行为对应力集中的依赖性。使用ABAQUS 2017进行有限元分析,采用动态显式求解方法。包含 Hashin 失效准则和内聚相互作用的连续壳单元是一般接触定义和内聚牵引-分离定律的组合函数,分别用于模拟层和层间的损伤增长。损伤起始由临界应力定义,和损伤演化由连续壳单元的软化行为和内聚相互作用的能量假设定义。初始损伤发生和最终破坏时应力的数值结果与具有各种纵横比的试样的实验结果非常吻合。此外,0°层的损伤行为的数值和实验结果非常吻合。还根据数值结果讨论了在实验中难以观察到的内部损伤和分层行为。
更新日期:2020-06-25
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