摘要
从幂律蠕变材料静态裂纹体在时间相关比例加载条件下的应力应变场分析出发，建立了弹性—幂律蠕变材料裂纹体在时间相关比例加载条件下的瞬态Ｊ（ｔ）积分和Ｃ（ｔ）积分的估算公式，并给出了载荷恒定和加载点位移恒定这两种特殊情况下的Ｊ（ｔ）积分和Ｃ（ｔ）积分的解析表达式．作为实例，计算分析了紧凑拉伸试样等几种典型裂纹构形在加载点位移恒定情况下的Ｊ（ｔ）积分和Ｃ（ｔ）积分，并与有限元解进行了比较．
Using the stress and strain fields for the power law creeping cracked body under time dependent proportional loading,this paper proposed the approximate estimation formula for the transient J(t) and C(t) integrals for the elastic power law creeping cracked body under time dependent proportional loading. For the constant applied loading,the present results are the same as Ainsworth′s ones. For the constant applied loading displacement,the present results are consistent with the ones of the finite element well.
出处
《科技通报》
1997年第6期353-357,共5页
Bulletin of Science and Technology
基金
国家自然科学基金
关键词
非稳态
蠕变
材料
裂纹尖端场
强近似
proportional loading, non steady creep, J(t) integral, C(t) integral
