Inelastic peridynamic model for molecular crystal particles

Silling, Stewart A.; Barr, Christopher Michael; Cooper, Marcia A.; Lechman, Jeremy B.; Bufford, Daniel Charles

doi:10.1007/s40571-021-00389-y

Inelastic peridynamic model for molecular crystal particles

Journal Article · 22 February 2021 · Computational Particle Mechanics

DOI:https://doi.org/10.1007/s40571-021-00389-y· OSTI ID:1769891

^[1]; Barr, Christopher Michael ^[1]; Cooper, Marcia A. ^[1]; Lechman, Jeremy B. ^[1]; Bufford, Daniel Charles ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

The peridynamic theory of solid mechanics is applied to modeling the deformation and fracture of micrometer-sized particles made of organic crystalline material. A new peridynamic material model is proposed to reproduce the elastic–plastic response, creep, and fracture that are observed in experiments. The model is implemented in a three-dimensional, meshless Lagrangian simulation code. In the small deformation, elastic regime, the model agrees well with classical Hertzian contact analysis for a sphere compressed between rigid plates. Under higher load, material and geometrical nonlinearity is predicted, leading to fracture. Finally, the material parameters for the energetic material CL-20 are evaluated from nanoindentation test data on the cyclic compression and failure of micrometer-sized grains.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC04-94AL85000; NA0003525

OSTI ID:: 1769891

Report Number(s):: SAND-2019-14128J; 681627; TRN: US2206777

Journal Information:: Computational Particle Mechanics, Vol. 8; ISSN 2196-4378

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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