ELASTIC-VISCOPLASTIC FIELDS NEAR THE TIP OF A PROPAGATING CRACK UNDER ANTI-PLANE SHEAR  

作　　者：李范春 赵文胜 汤龙生 

机构地区：[1]Marine Engineering College, Dalian Maritime University [2]The 31th Institute of CASIC

出　　处：《Applied Mathematics and Mechanics(English Edition)》2004年第9期1075-1082,共8页应用数学和力学（英文版）

摘　　要：The elastic-viscoplastic model proposed by Bingham was used to analyse the stress and strain surrounding the tip of a propagating crack under antiplane shear.The proper displacement pattern was given;the asymptotic equations were derived and solved numerically.The analysis and calculation show that for smaller viscosity the crack-tip possesses logarthmic singularity,and for larger viscosity it possesses power-law singularity.In critical case,the two kinds of singularity are consistent with each other.The result revealed the important role of viscosity for crack-tip field.The elastic-viscoplastic model proposed by Bingham was used to analyse the stress and strain surrounding the tip of a propagating crack under antiplane shear.The proper displacement pattern was given;the asymptotic equations were derived and solved numerically.The analysis and calculation show that for smaller viscosity the crack-tip possesses logarthmic singularity,and for larger viscosity it possesses power-law singularity.In critical case,the two kinds of singularity are consistent with each other.The result revealed the important role of viscosity for crack-tip field.

关 键 词：crack-tip field dynamic propagating VISCOPLASTIC 

分 类 号：O346.1[理学—固体力学]