• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Detecting barely visible impact damage detection on aircraft composites structures
【24h】

Detecting barely visible impact damage detection on aircraft composites structures

机译：检测飞机复合材料结构上几乎看不见的冲击损伤

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

Composites have many advantages as aircraft structural materials and for this reason their use is becoming increasingly widespread. Fragility of composite material to impact loading limits their application in aircraft structures. In particular, low velocity impacts can cause a significant amount of delamination, even though the only external indication of damage may be a very small surface indentation. This type of damage is often referred to as barely visible impact damage (BVID), and it can cause significant degradation of structural properties. If the damaged laminate is subjected to high compressive loading, buckling failure may occur. Therefore, there is the need to develop improved and more efficient means of detecting such damage. In this work a new NDT approach is presented, based on the monitoring of the nonlinear elastic material behaviour of damaged material. Two methods were investigated: a single-mode nonlinear resonance ultrasound (NRUS) and a nonlinear wave modulation spectroscopy (NWMS). The developed methods were tested on different composite plates with unknown mechanical properties and damage size and magnitude.rnThe presence of the nonlinearities introduced by the damage was clearly identified using both techniques. The results showed that the proposed methodology appear to be highly sensitive to the presence of damage with very promising future applications.
机译：复合材料具有许多优势，可作为飞机的结构材料，因此，它们的使用越来越广泛。复合材料对冲击载荷的脆性限制了它们在飞机结构中的应用。尤其是，低速冲击会导致大量分层，即使损坏的唯一外部迹象可能是很小的表面压痕。这种类型的损坏通常称为几乎看不见的冲击损坏（BVID），它可能导致结构性能显着下降。如果损坏的层压板承受高压缩载荷，则可能会发生屈曲失败。因此，需要开发改进的和更有效的手段来检测这种损坏。在这项工作中，基于对受损材料的非线性弹性材料行为的监测，提出了一种新的无损检测方法。研究了两种方法：单模非线性共振超声（NRUS）和非线性波调制光谱（NWMS）。所开发的方法在机械性能未知，损伤大小和大小未知的不同复合板上进行了测试。使用这两种技术可以清楚地识别出由损伤引起的非线性的存在。结果表明，所提出的方法论对损害的存在高度敏感，并且在未来的应用中非常有前景。

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