| 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.
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| 发表期刊 | PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
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| 2015-10-08 | |
| 卷号 | 471期号:2182页码:20150535 |
| ISSN | 1364-5021 |
| 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. |
| 关键词 | Projectile Impact Dynamic Overstress Strain-rate Effects Material Fragmentation Finite-element Simulation Crack Band Model |
| 学科领域 | Science & Technology - Other Topics |
| DOI | 10.1098/rspa.2015.0535 |
| URL | 查看原文 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000363483200030 |
| 关键词[WOS] | DYNAMIC FRAGMENTATION ; SOLIDS ; SHOCK ; DEFORMATION ; DISSIPATION ; COMPRESSION ; PENETRATION ; CERAMICS ; FRACTURE ; FAILURE |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 项目资助者 | Support under grant no. W911NF-15-1-0240 from the US Army Research Office, Durham, to Northwestern University, is gratefully acknowledged. |
| 课题组名称 | LNM苏业旺 |
| 论文分区 | 二类/Q1 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/58343 |
| 专题 | 非线性力学国家重点实验室 |
| 通讯作者 | Bazant, ZP (reprint author), Northwestern Univ, Dept Civil & Environm Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA. |
| 推荐引用方式 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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