Modeling particulate self-healing materials and application to uni-axial compression
type: Item
instance of: scholarly article
title: Modeling particulate self-healing materials and application to uni-axial compression
zbMATH Open document ID: 1203.74025
author: Olaf Herbst
author: S. Luding
published in: International Journal of Fracture
publication date: 2009-09-18T00:00:00Z
review text: The paper presents a model for self-healing in particulate materials based on a recently proposed piecewise linear contact model for elasto-plastic, adhesive, viscous, frictional particle-particle interactions. The used discrete element model (DEM) complements experiments on the scale of small representative volume elements (RVEs) and provides all information about all particles at any time. DEM requires only the contact forces and torques as the basic input to solve the equations of motion for all particles. The macroscopic material properties (e. g. elastic moduli, cohesion, friction, yield strength, dilatancy, anisotropy, etc.) are measured from the RVE tests. The proposed self-healing model admits to examine the damage detection sensitivity and rate and also the strength of the healed contacts. First, the authors briefly introduce a method that allows to simulate self-healing solid materials as granular packing. They discuss the normal and tangential contact forces and also viscous damping. Then, the tablet preparation of test samples is presented by including the stages of (i) creation of a loose configuration, (ii) pressure sintering, (iii) remove the pressure from the sample walls, and (iv) final relaxation of the system. As a result, a RVE sample is stated. Then, uni-axial unconfined compression is applied to the samples and the stress response is studied in the elastic regime, at the onset of, and during failure and also in the softening regime. In order to model a self-healing material, the local detection of damage is fulfilled and local healing initiates when damage is detected. With this aim, the authors introduce a self-healing scheme that is compatible with the developed contact model. Then compression tests for a self-healing material are presented. For fixed damage sensitivity and a fixed damage detection rate, damage is detected and healed by increasing the adhesive force instantaneously in the case of the healing criteria fulfillment. The results …
Mathematics Subject Classification ID: 74E20
Mathematics Subject Classification ID: 74R20
Mathematics Subject Classification ID: 74M10
zbMATH DE Number: 5605030
zbMATH Keywords: contact force law
zbMATH Keywords: frictional adhesion
zbMATH Keywords: elasto-plastic deformation
zbMATH Keywords: discrete element model
zbMATH Keywords: representative volume elements
reviewed by: Ivan A. Parinov
MaRDI profile type: Publication
full work available at URL: s10704-008-9299-y
OpenAlex ID: W2154836320
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DOI: 10.1007/S10704-008-9299-Y
description: scientific article; zbMATH DE number 5605030