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弯矩作用下弯管内壁环向裂纹应力强度因子分析
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Indexed by:期刊论文

Date of Publication:2013-02-28

Journal:压力容器

Included Journals:ISTIC

Volume:30

Issue:2

Page Number:48-53

ISSN No.:1001-4837

Key Words:有限元分析;应力强度因子;弯管;环向裂纹

Abstract:应力强度因子KI是缺陷结构安全评定的必需参数.利用有限元分析软件ANSYS自顶向下方法建立了弯管内壁环向裂纹模型,并对弯矩作用下的KI进行分析.结果表明:无论张开弯矩还是闭合弯矩,KI随裂纹半角θ、纵向裂纹角θ1及裂纹深度与壁厚之比a/t的变化趋势均相同,但变化梯度不同.对张开弯矩,KI随环向裂纹角θ2的变化存在120°和240°两个波峰位置;对闭合弯矩,KI随环向裂纹角θ2的变化存在60°,180°和300°三个波峰位置,并非所有承受弯矩作用的含内壁环向裂纹弯管均危险.

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Gender:Male

Alma Mater:大连理工大学

Degree:Doctoral Degree

School/Department:化工学院

Discipline:Chemical Process Equipment. Safety Science and Engineering

Business Address:大连理工大学西校区H509

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