个人信息Personal Information
学历：博士研究生毕业
学位：工学博士学位
性别：男
学科：力学. 航空宇航科学与技术. 材料科学与工程. 机械工程. 冶金工程. 先进制造. 航空工程. 材料工程. 冶金工程. 机械工程. 固体力学
多尺度力学，宏微观力学，梯度结构材料，界面力学，固体本构关系，应变梯度理论，晶体塑性有限元，离散位错动力学，分子动力学，高熵合金，大数据与机器学习，材料基因，极端力学，高性能材料，材料的增强与增韧
2022-08-15 合作论文“A peridynamic approach to solving general discrete dislocation dynamics problems in plasticity and fracture: Part I. model description and verification”在International Journal of Plasticity在线发表
发布时间：2022-08-15
Highlights
•A new peridynamic model solves discrete dislocation dynamics problems with high accuracy.
•The model replaces classical surface tractions with nonlocal interactions.
•Can simulate arbitrary domains with pre-damage, cracks, and voids of arbitrary shapes.
•No need for explicitly tracking boundaries, interfaces, cracks.
•Able to easily/naturally handle material damage and fracture processes.
Abstract
In this paper, we present a peridynamic (PD)-based solution for discrete dislocation dynamics (DDD) problems using the superposition (SP) framework. By replacing the classical surface traction in the complementary problem with a nonlocal/peridynamic one, the SP DDD-PD scheme can simulate arbitrary domains, including those with pre-damage, cracks, and voids of arbitrary shapes, without explicitly tracking boundaries, interfaces, cracks, etc. The new SP DDD-PD scheme is verified for the boundary value problems (BVPs) for single dislocation, multiple dislocations, dislocation emitted from a crack tip, and dislocation-void interaction. The numerical results are compared with those from other existing schemes: the discrete-continuous (DC) DDD-PD, and the SP DDD-FEM. The new SP DDD-PD is more accurate than the DC DDD-PD scheme, especially near dislocation cores and in problems with dislocations near defects (damage or interfaces). The high accuracy of the new SP DDD-PD near dislocation cores makes it suitable to model dislocation-based plasticity and fracture, problems that are studied in part II of this work.
Link
https://doi.org/10.1016/j.ijplas.2022.103401