双材料界面动态扩展裂纹尖端的渐近场  

Asymptotic fields of dynamic growing crack-tip on bi-material interface

作　　者：唐立强[1] 蔡艳红 刘长海 姜民政 

机构地区：[1]哈尔滨工程大学建筑工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工业大学学报》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)

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.

关 键 词：粘弹性材料 Ⅲ型界面裂纹尖端场 动态扩展 渐近场 力学模型 界面断裂 蠕变地层 油井套管 弹性双材料 

分 类 号：TE931.2[石油与天然气工程—石油机械设备] TB301[一般工业技术—材料科学与工程]