高温316L钢非线性疲劳蠕变损伤演化模型及其应用  

NONLINEAR FATIGUE CREEP DAMAGE EVOLUTION MODEL OF 316L STEEL UNDER HIGH TEMPERATURE AND ITS APPLICATION

作　　者：董杰[1,2] 陈学东[1] 范志超[1] 江慧丰[1,2] 姜恒[1] 陆守香[2] 

机构地区：[1]合肥通用机械研究院国家压力容器与管道安全工程技术研究中心,合肥230031 [2]中国科学技术大学安全与科学工程系,合肥230027

出　　处：《机械强度》2011年第4期586-589,共4页Journal of Mechanical Strength

基　　金：国家"十一五"科技支撑计划专题(2006BAK02B02);安徽省自然科学基金(070415223)~~

摘　　要：为了研究高温两级和多级疲劳蠕变载荷作用下计及载荷历程效应的寿命预测方法,文中首先基于韧性耗竭理论提出一种非线性疲劳蠕变损伤演化模型,并通过316L不锈钢高温单级应力、温度疲劳蠕变试验,确定模型中的损伤指数,以该损伤模型结合多级加载的损伤破坏准则对高温两级应力、温度疲劳蠕变载荷作用下316L钢的寿命进行预测,得出与试验较为一致的结果。In order to investigate high temperature 2-step and multi-step fatigue creep life prediction method considering the load history effect, a nonlinear fatigue creep damage evolution model was presented based on the toughness exhaustion theory.The damage exponent was obtained by the high temperature 1-step stress and temperature fatigue creep test of 316L stainless steel.High temperature fatigue creep life under 2-step stress and temperature load was predicted by the damage evolution model and the failure rule under multi-step load.The predicted results were in good agreement with the experimental ones.

关 键 词：疲劳 蠕变 两级 寿命预测 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG142.33[金属学及工艺—合金]