A micropolar peridynamic model with non-uniform horizon for static damage of solids considering different nonlocal enhancements

authored by
Yiming Zhang, Xueqing Yang, Xueya Wang, Xiaoying Zhuang
Abstract

Peridynamic models typically adopt regular point distributions and uniform horizons, limiting their flexibility and engineering applicability. In this work, a micropolar peridynamics approach with a non-uniform horizon (NHPD) is proposed. This approach is implemented in a conventional finite element framework using element-based discretization. Through modification of the dual-horizon approach in the preprocessing step, a point-dependent horizon and non-uniform beam-like bonds are built. By a domain correction strategy, the equivalence of the strain energy density is assured. Then, a novel energy–density-based failure criterion that directly relates the critical stretch to the mechanical strength is presented. The numerical results indicate the weak mesh dependency of NHPD and the effectiveness of the new failure criterion for Brazilian disk tests. Moreover, damage to solids with different nonlocal effects is shown to yield similar results through adjustment of only the mechanical strength.

Organisation(s)
Institute of Continuum Mechanics
External Organisation(s)
Hebei University of Technology
Tongji University
Type
Article
Journal
Theoretical and Applied Fracture Mechanics
Volume
113
ISSN
0167-8442
Publication date
06.2021
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Materials Science(all), Condensed Matter Physics, Mechanical Engineering, Applied Mathematics
Electronic version(s)
https://doi.org/10.1016/j.tafmec.2021.102930 (Access: Closed)
 

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