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. 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.

Stewart A. Silling

Christopher Barr

Marcia Cooper

Jeremy Lechman

Daniel C. Bufford

Computational Particle Mechanics

一般目标：COMPUTATIONAL PARTICLE MECHANICS (CPM) 是一本季刊，旨在发表涉及粒子和粒子方法的系统的建模和模拟的完整原创文章。目标是加强应用科学研究人员之间的交流，他们在研究中以一种或另一种形式使用“粒子”。具体目标：基于粒子的材料和数值方法已在自然科学和应用科学、工程中得到广泛应用, 生物学。“粒子方法/力学”一词现在对 21 世纪的研究人员来说意味着几个不同的事物，包括： (A) 粒子作为颗粒介质、颗粒流、等离子体、群等中的物理单位。 , (B) 在中尺度、微米和纳米尺度上表示连续材料相的粒子和 (C) 在离散元方法 (DEM)、粒子有限元方法等数值方法中作为连续和不连续的离散单元的粒子(PFEM)、分子动力学 (MD) 和平滑粒子流体动力学 (SPH)，仅举几例。

Computational Particle Mechanics (CPM) is a quarterly journal dedicated to publishing original research articles on systematic modeling and simulation involving particles and particle methods. The aim of the journal is to enhance communication among applied science researchers who utilize 'particles' in their studies in one form or another. Specifically, particle-based materials and numerical methods have found extensive applications in natural sciences, applied sciences, and engineering, including biology. For researchers in the 21st century, the term 'particle methods/mechanics' encompasses several different concepts, including: (A) particles as physical units in granular media, granular flows, plasmas, and clusters; (B) particles representing continuous material phases at mesoscopic, micrometer, and nanometer scales; and (C) particles as continuous and discontinuous discrete units in numerical methods such as Discrete Element Method (DEM), Particle Finite Element Method (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), among others.

《Computational Particle Mechanics》是一本季刊，旨在发表关于粒子及其方法的系统建模和模拟的原创研究文章。期刊的目标是促进应用科学研究人员之间的交流，尤其是那些在研究中以某种形式使用“粒子”的研究者。具体而言，基于粒子的材料和数值方法已经在自然科学、应用科学和工程领域得到了广泛应用，包括生物学等多个领域。对于21世纪的研究者而言，“粒子方法/力学”一词涵盖了多个不同的概念，包括： (A) 粒子作为颗粒介质、颗粒流、等离子体和群体等中的物理单位； (B) 在中尺度、微米和纳米尺度上表示连续材料相的粒子； (C) 在离散元方法（DEM）、粒子有限元方法（PFEM）、分子动力学（MD）和光滑粒子流体动力学（SPH）等数值方法中作为连续和不连续的离散单元的粒子。

Category	Quartile
工程技术	3
工程技术, 数学跨学科应用	3
工程技术, 力学	3

Inelastic peridynamic model for molecular crystal particles

ivySCI AI Smartly Parses PDF, Answers Researchers' Questions, and Helps You Understand Papers in Seconds

Journal Info