• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Impact and damage tolerance in composite materials >Predicting Low-Velocity Impact Damage in Composites using a Cohesive Fracture Model
【24h】

Predicting Low-Velocity Impact Damage in Composites using a Cohesive Fracture Model

机译：使用内聚断裂模型预测复合材料的低速冲击损伤

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A numerical model is developed for predicting low-velocity impact induced forcernand damage in laminated composites. Stacked shell elements are employed to model thernlaminate plies with discrete interface elements being placed in pre-determined potentialrndamage zones to model the initiation and propagation of in-plane matrix cracks andrninterlaminar delamination. These interface elements are governed by a bi-linear cohesivernfailure law. Cohesive element zones are determined by a separate FE analysis using a 3Drnsolid element model to find the damage initiation sites. In order to save the computationalrneffort, low-velocity impact is modelled by applying quasi-static indentation load. For arnclustered cross-ply laminate, the model accurately calculated the impact load and damagernarea. It is shown that matrix cracks should be included in the model in order to simulate therndelamination in adjacent interface. The practical outcome of this research is a validated FErnmodelling approach that can be further improved for predicting low-velocity impact damage.
机译：建立了一个数值模型来预测层压复合材料中的低速冲击诱导力和损伤。堆叠的壳单元被用来对热层压板进行建模，而离散的界面单元被放置在预定的潜在损伤区域中，以模拟平面内基体裂纹的产生和扩展以及层间分层。这些界面元素受双线性内聚破坏定律支配。通过使用3Drnsolid元素模型进行单独的有限元分析来确定粘结元素区域，以找到破坏的起始位置。为了节省计算量，通过施加准静态压入载荷来模拟低速冲击。对于无纺布交叉层压板，该模型可以准确计算出冲击载荷和破损。结果表明，应在模型中包括基体裂纹，以模拟相邻界面的分层现象。这项研究的实际成果是一种经过验证的有限元建模方法，该方法可以进一步改进以预测低速冲击损伤。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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