摘要
建立了弹性 -粘弹性材料Ⅲ型界面裂纹动态扩展的力学模型 ,求得了裂尖应力、应变和位移场分离变量形式的渐近解及其数值结果 .在蠕变变形第二阶段 ,弹性变形和粘性变形同时在裂尖场中占主导地位 ,(σ ,ε)∝r-1/(n-1) .讨论了材料参数n和M对裂尖场的影响 .数值计算表明
A mechanical model is established for dynamic growing interfacial crack-tip between elastic and viscoelastic materials. Near-tip dynamic stress, strain and displacement fields are presented for Mode III interface crack problem. It is shown that in stable creep growing stage, visco-deformation and elastic-deformation are equally dominant in the near-tip field as (σΕ) ∝ r-1/(n-1). The influence of material parameters, n and M, in the near-tip fields is discussed. Through numerical calculation, it is shown that the near-tip fields are mainly governed by the viscosity parameter n.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2002年第1期87-90,共4页
Journal of Harbin Institute of Technology
基金
黑龙江省自然科学基金资助项目 (A0 0 -0 9)
