• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Materials >Micromechanical Modeling of Damage Evolution and Mechanical Behaviors of CF/Al Composites under Transverse and Longitudinal Tensile Loadings
【2h】

Micromechanical Modeling of Damage Evolution and Mechanical Behaviors of CF/Al Composites under Transverse and Longitudinal Tensile Loadings

机译：横向/纵向拉伸载荷下CF / Al复合材料损伤演化和力学行为的微力学建模

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper investigates the progressive damage and failure behavior of unidirectional graphite fiber-reinforced aluminum composites (CF/Al composites) under transverse and longitudinal tensile loadings. Micromechanical finite element analyses are carried out using different assumptions regarding fiber, matrix alloy, and interface properties. The validity of these numerical analyses is examined by comparing the predicted stress-strain curves with the experimental data measured under transverse and longitudinal tensile loadings. Assuming a perfect interface, the transverse tensile strength is overestimated by more than 180% and the transverse fracture induced by fiber failure is unrealistic based on the experimental observations. In fact, the simulation and experiment results indicate that the interface debonding arising from the matrix alloy failure dominates the transverse fracture, and the influence of matrix alloy properties on the mechanical behavior is inconspicuous. In the case of longitudinal tensile testing, however, the characteristic of interface bonding has no significant effect on the macroscopic mechanical response due to the low in-situ strength of the fibers. It is demonstrated that ultimate longitudinal fracture is mainly controlled by fiber failure mechanisms, which is confirmed by the fracture morphology of the tensile samples.
机译：本文研究了单向石墨纤维增强铝复合材料（CF / Al复合材料）在横向和纵向拉伸载荷下的渐进破坏和破坏行为。使用有关纤维，基体合金和界面特性的不同假设进行微机械有限元分析。通过将预测的应力-应变曲线与在横向和纵向拉伸载荷下测得的实验数据进行比较，可以检验这些数值分析的有效性。假设界面完美，根据实验观察结果，横向拉伸强度被高估了180％以上，并且纤维断裂引起的横向断裂是不现实的。实际上，仿真和实验结果表明，基体合金破坏引起的界面剥离占主导，而基体合金性能对力学性能的影响并不明显。然而，在纵向拉伸试验中，由于纤维的低原位强度，界面粘合的特性对宏观机械响应没有显着影响。结果表明，最终的纵向断裂主要由纤维破坏机制控制，这由拉伸样品的断裂形态证实。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号