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Ⅰ型裂纹尖端圆弧对应力强度因子影响的数值研究
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Indexed by:期刊论文

Date of Publication:2010-02-08

Journal:科学技术与工程

Included Journals:ISTIC

Volume:10

Issue:4

Page Number:961-965

ISSN No.:1671-1815

Key Words:裂纹尖端圆弧;应力强度因子;有限元法

Abstract:应力强度因子表征了裂纹尖端奇异应力场的强度,它是研究裂纹扩展规律和带裂纹构件强度的基础.采用有限元法,对受均布荷载作用存在边缘Ⅰ型裂纹的平面板进行了数值分析.研究了裂纹尖端圆弧对应力强度因子的影响,分别计算了具有不同裂尖圆弧r0的Ⅰ型裂纹的应力强度因子.采用应力法计算不同半径处的表观应力强度因子,插值到裂尖圆弧而得.根据计算结果,绘制KI-r0曲线,利用最小二乘法拟合至尖裂纹(r0=0)即得理想尖裂纹的应力强度因子,与解析解相差仅0.7%.该曲线为带圆弧裂纹的应力强度因子测试和带圆弧裂纹构件强度计算提供了依据.

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Supervisor of Doctorate Candidates
Supervisor of Master's Candidates

Gender:Male

Alma Mater:大连理工大学

Degree:Doctoral Degree

School/Department:力学与航空航天学院

Discipline:Engineering Mechanics. Applied and Experimental Mechanics. Biomechanics and Nanomechanics

Business Address:大连理工大学 A1区26号 力学系203室

Contact Information:yanhh@dlut.edu.cn 0411-84708397

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