IMECH-IR  > 非线性力学国家重点实验室
Impact Comminution of Solids Due to Progressive Crack Growth Driven by Kinetic Energy of High-Rate Shear
Bazant, ZP; Su YW(苏业旺)
Source PublicationJOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
2015-05
Volume82Issue:3Pages:031007
ISSN0021-8936
Abstract

A new theory, inspired by analogy with turbulence, was recently proposed to model the apparent dynamic overstress due to the energy that is dissipated by material comminution during penetration of missiles into concrete walls. The high-rate interface fracture comminuting the material to small particles was considered to be driven by the release of kinetic energy of high-rate shear of the forming particles, and the corresponding energy dissipation rate was characterized in the damage constitutive law by additional viscosity. However, in spite of greatly improved predictions for missile impact and penetration, the calculation of viscosity involved two simplifications-one crude simplification in the calculation of viscosity from the shear strain rate, and another debatable simplification in treating the comminution as an instantaneous event, as in the classical rate-independent fracture mechanics. Presented is a refined theory in which both simplifications are avoided without making the theory significantly more complicated. The interface fracture is considered to be progressive and advance according to Evans' power law extended to the fast growth of interface crack area. The growth rate of interface cracks naturally leads to an additional viscosity, which allows close matching of the published test data. In combination with the microplane damage constitutive model M7 for concrete, the refined theory gives a close match of the exit velocities of missiles penetrating concrete walls of different thicknesses and of the penetration depths of missiles of different velocities into a massive block.

;
KeywordMissile Impact Penetration Fragmentation Of Concrete Dynamic Fracture Crack Growth Rate Viscous Damping Particle Size Distribution Turbulence Finite Element Analysis Dynamic Overstress
Subject AreaMechanics
DOI10.1115/1.4029636
Indexed BySCI ; EI
Language英语
WOS IDWOS:000349710700007
WOS Research AreaMechanics
WOS SubjectMechanics
Funding OrganizationU.S. Army Research Office, Durham ; ADD, Korea, through Daejeon University
DepartmentLNM苏业旺
Classification一类/力学重要期刊
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58354
Collection非线性力学国家重点实验室
Corresponding AuthorBazant, ZP
Recommended Citation
GB/T 7714
Bazant, ZP,Su YW. Impact Comminution of Solids Due to Progressive Crack Growth Driven by Kinetic Energy of High-Rate Shear[J]. JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME,2015,82(3):031007.
APA Bazant, ZP,&Su YW.(2015).Impact Comminution of Solids Due to Progressive Crack Growth Driven by Kinetic Energy of High-Rate Shear.JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME,82(3),031007.
MLA Bazant, ZP,et al."Impact Comminution of Solids Due to Progressive Crack Growth Driven by Kinetic Energy of High-Rate Shear".JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME 82.3(2015):031007.
Files in This Item: Download All
File Name/Size DocType Version Access License
Impact Comminution o(398KB)期刊论文出版稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Bazant, ZP]'s Articles
[Su YW(苏业旺)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Bazant, ZP]'s Articles
[Su YW(苏业旺)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Bazant, ZP]'s Articles
[Su YW(苏业旺)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Impact Comminution of Solids Due to Progressive Crack Growth Driven by Kinetic Energy of High-Rate Shear
Format: Unknown
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.