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Strain-rate-dependent microplane model for high-rate comminution of concrete under impact based on kinetic energy release theory
Kirane K; Su YW(苏业旺); Bazant ZP; Bazant, ZP (reprint author), Northwestern Univ, Dept Civil & Environm Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA.
Source PublicationPROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
2015-10-08
Volume471Issue:2182Pages:20150535
ISSN1364-5021
AbstractThe apparent increase of strength of concrete at very high strain rates experienced in projectile impact (10 s(-1) to 10(6) s(-1)), called 'dynamic overstress', has recently been explained by the theory of release of local kinetic energy of shear strain rate in finite size particles about to form. This theory gives the particle size and the additional kinetic energy density that must be dissipated in finite-element codes. In previous research, it was dissipated by additional viscosity, in a model partly analogous to turbulence theory. Here it is dissipated by scaling up the material strength. Microplane model M7 is used and its stress-strain boundaries are scaled up by factors proportional to the -4/3rd power of the effective deviatoric strain rate and its time derivative. The crack band model with a random tetrahedral mesh is used and all the artificial damping is eliminated. The scaled M7 model is seen to predict the crater shapes and exit velocities of projectiles penetrating concrete walls of different thicknesses as closely as the previous models. The choice of the finite strain threshold for element deletion criterion, which can have a big effect, is also studied. It is proposed to use the highest threshold above which a further increase has a negligible effect.
KeywordProjectile Impact Dynamic Overstress Strain-rate Effects Material Fragmentation Finite-element Simulation Crack Band Model
Subject AreaScience & Technology - Other Topics
DOI10.1098/rspa.2015.0535
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000363483200030
WOS KeywordDYNAMIC FRAGMENTATION ; SOLIDS ; SHOCK ; DEFORMATION ; DISSIPATION ; COMPRESSION ; PENETRATION ; CERAMICS ; FRACTURE ; FAILURE
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationSupport under grant no. W911NF-15-1-0240 from the US Army Research Office, Durham, to Northwestern University, is gratefully acknowledged.
DepartmentLNM苏业旺
Classification二类/Q1
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58343
Collection非线性力学国家重点实验室
Corresponding AuthorBazant, ZP (reprint author), Northwestern Univ, Dept Civil & Environm Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA.
Recommended Citation
GB/T 7714
Kirane K,Su YW,Bazant ZP,et al. Strain-rate-dependent microplane model for high-rate comminution of concrete under impact based on kinetic energy release theory[J]. PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES,2015,471(2182):20150535.
APA Kirane K,苏业旺,Bazant ZP,&Bazant, ZP .(2015).Strain-rate-dependent microplane model for high-rate comminution of concrete under impact based on kinetic energy release theory.PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES,471(2182),20150535.
MLA Kirane K,et al."Strain-rate-dependent microplane model for high-rate comminution of concrete under impact based on kinetic energy release theory".PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 471.2182(2015):20150535.
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