石油化工高等学校学报

石油化工高等学校学报 ›› 2009, Vol. 22 ›› Issue (2): 63-65.

• 化工机械 • 上一篇    下一篇

周期阵列压痕奇异应力场与开裂(PartII:压痕开裂临界载荷)

王晓华1, 马英利2, 孙 壮1, 谢禹钧1   

  1. 1.辽宁石油化工大学机械工程学院,辽宁抚顺113001;
    2.辽河油田油气集输公司,辽宁盘锦124010
  • 收稿日期:2008-10-22 修回日期:2009-03-13 出版日期:2009-06-25 发布日期:2009-06-25
  • 作者简介:王晓华(1959 -), 女, 四川泸州市, 副教授
  • 基金资助:
    国家自然科学基金资助(50771052)。

Singular Stress Fields and Fracture for Periodic -Arrayed Indentation (Part II :Critical Load for Cracking)

  1. 1.Department of Mechanical Engineering, Liaoning University of Petroleum & Chemical Technology, Fushun Liaoning 113001, P. R. China;
     2.Oil and Gas Transportation Company of Liaohe, Panjin Liaoning 124010, P.R.China
  • Received:2008-10-22 Revised:2009-03-13 Published:2009-06-25 Online:2009-06-25

摘要: 周期阵列压痕方法是研究微观摩擦学的工具之一。由于周期阵列刚性压头压在半平面弹性体的表面时,会产生周期的I型奇异压应力场,该奇异应力场的应力集中达到一定程度时,即达到临界条件时,该奇异应力场所在的边界将开裂。压痕边界的开裂问题是一个新型的断裂力学问题,通过边界移动的能量释放率的分析给出了压痕边界开裂能量释放率数学表征,并给出边界开裂的临界载荷和临界开裂角。

关键词: 断裂 , 接触力学 , 应力强度因子 , 压痕开裂

Abstract: Periodic-arrayed indentation is one of the powerful tools in investigating the near surface properties of materials in the micro-/nano-scale.When an elastic substrate in half-plane was subject to indentations by a rigid ,flat - ended punch ,a singular stress field and K-dominant region should arise adjacent to the punch edges.When the intensification of such singular stress fields reaches its critical value, fracture will take place on the surface of the contact boundary. The cracking of indentation was a new type of fracture problem.By using the energy release rate of boundary translation the fracture of indentation has been formulized and critical load and critical cracking angle of the indentation have been found.

Key words: Fracture , Contact mechanics , Stress intensity factors , Indentation

引用本文

王晓华,马英利,孙 壮,谢禹钧. 周期阵列压痕奇异应力场与开裂(PartII:压痕开裂临界载荷)[J]. 石油化工高等学校学报, 2009, 22(2): 63-65.

WANG Xiao-hua, MA Ying-li, SUN Zhuang, XIE Yu-jun. Singular Stress Fields and Fracture for Periodic -Arrayed Indentation (Part II :Critical Load for Cracking)[J]. Journal of Petrochemical Universities, 2009, 22(2): 63-65.

使用本文

0
    /   /   推荐

导出引用管理器 EndNote|Ris|BibTeX

链接本文: http://journal.lnpu.edu.cn/syhg/CN/

               http://journal.lnpu.edu.cn/syhg/CN/Y2009/V22/I2/63