• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Smart Structures and Materials 2002: Damping and Isolation, Mar 18-20, 2002, San Diego, USA >Passive Damping of Laminated Composite Materials with Engineered Defects
【24h】

Passive Damping of Laminated Composite Materials with Engineered Defects

机译：具有工程缺陷的层合复合材料的被动阻尼

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

Constrained layer damping (CLD) methods provide significant damping in laminated composite materials in bending modes. CLD treatments also provide damping mechanisms in axial modes in structures with significant free edges. Where free-edges are absent such as in cylinders or plates with fixed edges, the damping of axial modes in the structure is limited and damping of bending modes is reduced. This paper investigates an alternate passive geometric treatments that improve damping in constrained layer composite materials. In particular, the effect of including strategically-placed geometric anomalies or wrinkles in laminated composite materials is presented. Correct placement of the anomalies result in increased damping in axial modes due to the three-dimensional stress state created in the viscoleastic layer near the anomaly. Because this method does not depend on strain energies created at the free edge, effective damping of axial modes in cylinders may be realized. A closed-form solution is derived that can be used to conduct parametric design studies. Design parameters include defect placement, defect geometry, and composite material properties.
机译：约束层阻尼（CLD）方法在弯曲模式下为层压复合材料提供了显着的阻尼。 CLD处理还为具有明显自由边缘的结构提供了轴向模式的阻尼机制。在没有自由边缘的地方（例如在具有固定边缘的圆柱或板中），结构中轴向模式的阻尼是有限的，而弯曲模式的阻尼是减小的。本文研究了一种可替代的无源几何处理方法，可以改善约束层复合材料的阻尼。特别地，提出了在层压复合材料中包括策略性放置的几何异常或褶皱的效果。由于在异常附近的粘弹性层中产生的三维应力状态，异常的正确放置导致轴向模式中的阻尼增加。因为该方法不依赖于在自由边缘处产生的应变能，所以可以实现气缸中轴向模式的有效阻尼。得出了一种封闭形式的解决方案，可用于进行参数设计研究。设计参数包括缺陷位置，缺陷几何形状和复合材料属性。

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