• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >ON RAYLEIGH WAVES AND RAYLEIGH WAVE EXTENSION OF SURFACE MICRO-CRACKS (LAMB SOLUTION, RAYLEIGH SOLUTION, FRACTURE MECHANICS).
【24h】

ON RAYLEIGH WAVES AND RAYLEIGH WAVE EXTENSION OF SURFACE MICRO-CRACKS (LAMB SOLUTION, RAYLEIGH SOLUTION, FRACTURE MECHANICS).

机译：关于表面微裂纹（羔羊溶液，瑞利溶液，断裂力学）的瑞利波和瑞利波扩展。

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

The problem under investigation in this dissertation concerns the extension of surface micro-cracks induced by the action of a surface or Rayleigh wave. This problem is examined both theoretically and experimentally. The theoretical approach involves a full-field reappraisal of the original Rayleigh solution for a surface wave propagating in a homogeneous, isotropic, elastic, two-dimensional material, for the cases of plane strain and plane stress. As a refinement to this approach the full-field solution by Lamb is also reconsidered. To obtain a view of the entire field of interest and to compare the Rayleigh and Lamb results, the theoretically predicted isochromatic patterns associated with a propagating Rayleigh wave in two-dimensions are generated. Using the Griffith-Irwin energy release rate fracture criterion for cracks under combined Mode I and Mode II loading, a prediction is made of the path and final length of the surface micro-crack extension produced by the Rayleigh wave. Predictions of the crack extension direction are also obtained using the maximum normal stress fracture criterion. The experimental approach uses dynamic photoelasticity to observe the isochromatic patterns associated with a Rayleigh wave propagating along the narrow edge of a transparent, birefringent plate and also examines in detail the process of crack extension due to a Rayleigh wave. Finally, the theoretically and experimentally obtained results are compared, and reasonable agreement is obtained.
机译：本文研究的问题涉及表面或瑞利波作用引起的表面微裂纹的扩展。这个问题在理论上和实验上都得到了检验。对于平面应变和平面应力的情况，理论方法涉及对在均质，各向同性，弹性二维材料中传播的表面波进行原始瑞利解的全场重新评估。作为对该方法的改进，还重新考虑了Lamb的全场解决方案。为了获得整个感兴趣区域的视图并比较Rayleigh和Lamb结果，生成了与二维传播的Rayleigh波相关的理论上预测的同色图案。使用Griffith-Irwin能量释放速率断裂准则（在模式I和模式II组合载荷下），对瑞利波产生的表面微裂纹扩展的路径和最终长度进行了预测。还可以使用最大法向应力断裂准则获得裂纹扩展方向的预测。实验方法使用动态光弹性观察与沿着透明双折射板的窄边传播的瑞利波相关的同色图案，并且还详细研究了由于瑞利波引起的裂纹扩展过程。最后，对理论和实验结果进行了比较，并取得了合理的共识。

著录项

  • 作者

    CARDENAS-GARCIA, JAIME FERNANDO.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 1983
  • 页码 309 p.
  • 总页数 309
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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