辽宁石油化工大学学报

辽宁石油化工大学学报 ›› 2006, Vol. 26 ›› Issue (2): 63-65.

• 化工机械 • 上一篇    下一篇

工字型截面梁腹板中心裂纹的应力强度因子

尤国武, 谢禹钧   

  1. 辽宁石油化工大学机械工程学院, 辽宁抚顺113001
  • 收稿日期:2005-12-14 出版日期:2006-02-25 发布日期:2006-02-25
  • 作者简介:尤国武(1965-), 男(满族), 辽宁抚顺市, 工程师,在读硕士。

Stress Intensity Factors for Center Crack in Sectional Ⅰ -Beam

  1. School of Mechanical Engineering , Liaoning University of Petroleum & Chemical Technology ,Fushun Liaoning 113001, P .R .China
  • Received:2005-12-14 Published:2006-02-25 Online:2006-02-25

摘要:         工字型梁是工程中最常见的结构之一。其中的任何裂纹都将成为结构断裂失效的隐患。带有裂纹的工字型梁是典型的三维有限边界问题, 用经典方法求解其裂纹的应力强度因子通常是相当困难的。利用裂纹非自发扩展能量释放率得到一个求解均布载荷作用下工字型截面梁中心裂纹应力强度因子的一个新方法。给出了工字型截面梁裂纹非自发扩展能量释放率G 积分与应力强度因子的关系, 同时也给出了G积分与载荷、几何参量以及机械性能参数的关系, 进而得到工字型截面梁腹板中心裂纹的应力强度因子。

关键词: 工字型梁,  应力强度因子,  裂纹,    , 能量释放率

Abstract:

     The Ⅰ -beam is a widely used structure in engineering .Any crack in it may cause the structure failure .Ⅰ -beam with cracks relates to typical three -dimensional finite boundary problem .It is difficult to determine the stress intensity factors by using the traditional method .A new method to determine stress -intensity was proposed, which applied release rate of non -spontaneous extending energy to solving stress-intensity factors of center cracks in section I -beam under the uniformly distributed load.The relationship between the G integral of release rate of non -spontaneous ex tending energy and stress -intensity factors w as given. The relationships among G integral , load, geometry parameters and machine function parameters were provided .Furthermore , the stress-intensity factor of center cracks in sectional Ⅰ -beam was obtained.

Key words:  Ⅰ -beam ,  Stress intensity factor ,  Crack ,  Energy release rate

引用本文

尤国武, 谢禹钧. 工字型截面梁腹板中心裂纹的应力强度因子[J]. 辽宁石油化工大学学报, 2006, 26(2): 63-65.

YOU Guo -w u,XIE Yu -jun. Stress Intensity Factors for Center Crack in Sectional Ⅰ -Beam[J]. Journal of Liaoning Petrochemical University, 2006, 26(2): 63-65.

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