摘要
应用有限元及连续介质力学计算了平面应变条件下体心立方铁中不同取向裂纹的裂尖应力场和弹性应变能密度分布,从宏微观相结合角度分析了裂尖场分布与裂尖微结构演化的相互关联。指出裂尖塑性变形的具体形式与裂尖滑移面上分切应力的大小密切相关,并从能量角度解释了裂尖相变产生的原因,最后结合相关分子动力学研究成果探讨了裂尖奇异性区域。
In this paper, the finite element method is applied to calculate the stress field and the elastic strain energy density distribution at the crack tip. The results indicate that the microstructure evolution at ＇the crack tip is closely related with the shear stress on the slip plane near the crack tip. Moreover, the martensitic phase transformation is investigated based on the energy analysis. Finally, the truncated distance of continuum elastic field is discussed comparing with the results calculated by molecular dynamics simulations.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2011年第B04期20-24,共5页
Chinese Journal of Computational Mechanics
基金
国家自然科学基金(10672016)
中央高校基本科研业务费专项资金资助项目
