粉末冶金材料各向异性连续型损伤模型研究

ANISOTROPY CONTINUUM DAMAGE MODEL STUDY OF POWDER METALS

在采用微裂纹扩展区描述脆性材料损伤状态的基础上,通过引入颗粒度大小和微裂纹概率分布密度函数来研究粉末冶金材料特征体积单元的损伤演化.同时结合Hill自洽模型采用空间混合平均的方法,可考虑粉末冶金材料的微结构特征及微裂纹间相互作用的影响,可描述粉末冶金类材料的各向异性连续型损伤.

Grain size and the probability function was introduced to study the damage evolvement based the damage model of domain of micro-crack growth.At the same time,the averaging approach based on the hill s self-consistent scheme is then used to consider the influence of materials microstructure and between micro-crack,can be used to describe the anisotropy continuum damage.