Strain-rate-dependent microplane model for high-rate comminution of concrete under impact based on kinetic energy release theory

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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
刊名	PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
	2015-10-08
通讯作者邮箱	z-bazant@northwestern.edu
卷号	471 期号:2182 页码:20150535
关键词	projectile impact dynamic overstress strain-rate effects material fragmentation finite-element simulation crack band model
ISSN号	1364-5021
通讯作者	Bazant, ZP (reprint author), Northwestern Univ, Dept Civil & Environm Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA.
产权排序	[Kirane, Kedar; Su, Yewang; Bazant, Zdenek P.] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA; [Su, Yewang] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
中文摘要	The 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.
学科主题	Science & Technology - Other Topics
分类号	二类/Q1
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	DYNAMIC FRAGMENTATION ; SOLIDS ; SHOCK ; DEFORMATION ; DISSIPATION ; COMPRESSION ; PENETRATION ; CERAMICS ; FRACTURE ; FAILURE
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1098/rspa.2015.0535
语种	英语
WOS记录号	WOS:000363483200030
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/58343]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Kirane K,Su YW,Bazant ZP. 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.(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.