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Title: Variable horizon in a peridynamic medium

Journal Article · · Journal of Mechanics of Materials and Structures
 [1];  [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Here, a notion of material homogeneity is proposed for peridynamic bodies with variable horizon but constant bulk properties. A relation is derived that scales the force state according to the position-dependent horizon while keeping the bulk properties unchanged. Using this scaling relation, if the horizon depends on position, artifacts called ghost forces may arise in a body under a homogeneous deformation. These artifacts depend on the second derivative of the horizon and can be reduced by employing a modified equilibrium equation using a new quantity called the partial stress. Bodies with piecewise constant horizon can be modeled without ghost forces by using a simpler technique called a splice. As a limiting case of zero horizon, both the partial stress and splice techniques can be used to achieve local-nonlocal coupling. Computational examples, including dynamic fracture in a one-dimensional model with local-nonlocal coupling, illustrate the methods.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1311296
Journal Information:
Journal of Mechanics of Materials and Structures, Vol. 10, Issue 5; ISSN 1559-3959
Publisher:
Mathematical Science PublishersCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 72 works
Citation information provided by
Web of Science

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Cited By (11)

An implicit dual‐based approach to couple peridynamics with classical continuum mechanics journal August 2019
Dual-horizon peridynamics: Dual-horizon peridynamics
  • Ren, Huilong; Zhuang, Xiaoying; Cai, Yongchang
  • International Journal for Numerical Methods in Engineering, Vol. 108, Issue 12 https://doi.org/10.1002/nme.5257
journal July 2016
Superposition-based coupling of peridynamics and finite element method journal February 2019
Voronoi-based peridynamics and cracking analysis with adaptive refinement: Voronoi-based peridynamics and cracking analysis with adaptive refinement journal August 2017
Peridynamics review journal October 2018
A new peridynamic formulation with shear deformation for elastic solid journal July 2016
Quasinonlocal coupling of nonlocal diffusions preprint January 2016
A quasinonlocal coupling method for nonlocal and local diffusion models preprint January 2017
A non-ordinary peridynamics implementation for anisotropic materials preprint January 2017
Reduction of integration domain in Triebel-Lizorkin spaces preprint January 2018
A review of Local-to-Nonlocal coupling methods in nonlocal diffusion and nonlocal mechanics preprint January 2019