Asymptotic solutions of mode I steady growth crack in materials under creep conditions

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• 作者：Qinghua Meng ; ^{mengqinghua@hrbeu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Zhenqing Wang ; ^{wangzhenqing@hrbeu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：asymptotic analysis ; steady-state growth ; small scale conditions ; creep materials
• 刊名：Acta Mechanica Solida Sinica
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：28
• 期：5
• 页码：578-591
• 全文大小：433 K

文摘

An asymptotic analysis is made on problems with a steady-state crack growth coupled with a creep law model under tensile loads. Asymptotic equations of crack tip fields in creep materials are derived and solved numerically under small scale conditions. Stress and strain functions are adopted under a polar coordinate system. The governing equations of asymptotic fields are obtained by inserting the stress field and strain field into the material law. The crack growth rate rather than fracture criterion plays an important role in the crack tip fields of materials with creep behavior.