碳扩散和扩散应力的相互影响分析  

INTERACTION BETWEEN CARBON DIFFUSION AND DIFFUSION-INDUCED STRESS

作　　者：杨小斌[1,2] 涂善东[1] 

机构地区：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237 [2]常州工学院机电工程学院,常州213002

出　　处：《固体力学学报》2013年第S1期74-78,共5页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金项目(50835003,10772067)资助

摘　　要：论文详细给出了线弹性小变形条件下金属渗碳过程中碳元素扩散与扩散应力之间的耦合方程,利用该方程研究了平面应变条件下渗碳与扩散应力之间的相互关系,结果表明耦合关系对于碳扩散与扩散应力都有显著的影响,其中联系主应力与碳浓度的弹性相容关系是最为主要的影响关系,在不考虑其他弱耦合关系的条件下,它可以使碳扩散方程和静力平衡方程解耦.The coupling functions of the carbon diffusion and diffusion-induced stress are given in detail based on assumption of linear elastic and small deformation.The interaction between the carbon concentration and diffusion-induced stress is investigated under the condition of plane strain.The results show the carbon diffusion and the diffusion-induced stress are dependent on the coupling effect.The elastic compatible equation,which combines carbon concentration with hydrostatic stress,is dominant which results in uncoupling the diffusion equation and the static equilibrium equations,if other weak couplings are taken into account.

关 键 词：渗碳 扩散应力 耦合关系 解耦 

分 类 号：TQ021.4[化学工程]