THE INTERFACIAL CRACK BETWEEN TWO DISSIMILAR ELASTIC-PLASTIC MATERIALS

【摘要】 <正> This paper presents an exact asymptotic analysis on the interfacial crack between two dissimi-lar elastic-plastic materials.These two materials have identical hardening exponent（n₁=n₂）but different hard-ening coefficient（α₁=α₂）,Two groups of the near-crack-tip fields have been obtained,which not only satisfythe continuity of both tractions（σ_θ,τ_rθ）and displacements（u_r,u_θ）on the interface,but also meet thetraction free conditions on the crack faces.The first group of fields have the mode mixity M^p quite close toM^p=1（MODE Ⅰ）within the whole range 0≤α₁/α₂<∞.As for the second group of fields,which is onlyobtained within the narrow range 0.9≤α₁/α₂≤1,it is found that the mode mixity changes sharply with theratio value α₁/α₂.更多还原

【Abstract】 This paper presents an exact asymptotic analysis on the interfacial crack between two dissimi- lar elastic-plastic materials.These two materials have identical hardening exponent（n₁=n₂）but different hard- ening coefficient（α₁=α₂）,Two groups of the near-crack-tip fields have been obtained,which not only satisfy the continuity of both tractions（σ_θ,τ_rθ）and displacements（u_r,u_θ）on the interface,but also meet the traction free conditions on the crack faces.The first group of fields have the mode mixity M^p quite close to M^p=1（MODE Ⅰ）within the whole range 0≤α₁/α₂<∞.As for the second group of fields,which is only obtained within the narrow range 0.9≤α₁/α₂≤1,it is found that the mode mixity changes sharply with the ratio value α₁/α₂.更多还原