ASYMPTOTIC SOLUTIONS OF MODE I STEADY GROWTH CRACK IN MATERIALS UNDER CREEP CONDITIONS  

作　　者：Qinghua Meng Zhenqing Wang 

机构地区：[1]College of Aerospace and Civil Engineering, Harbin Engineering University

出　　处：《Acta Mechanica Solida Sinica》2015年第5期578-591,共14页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11272096 and 11472086);the Research Fund for the Doctoral Program of Higher Education of China(No.20112304110015)

摘　　要：An asymptotic analysis is made on problems with a steady-state crack growth cou- pled 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 func- tions 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.An asymptotic analysis is made on problems with a steady-state crack growth cou- pled 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 func- tions 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.

关 键 词：asymptotic analysis steady-state growth small scale conditions creep materials 

分 类 号：O346.1[理学—固体力学] TS101.923[理学—力学]