Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure | |
Wang HY(汪海英); Bai YL(白以龙); Xia MF(夏蒙棼); Ke FJ(柯孚久) | |
刊名 | Mechanics of Materials |
2006 | |
通讯作者邮箱 | why@lnm.imech.ac.cn |
卷号 | 38期号:1-2页码:57-67 |
ISSN号 | 0167-6636 |
通讯作者 | Wang, HY (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China. |
中文摘要 | The process of damage evolution concerns various scales, from micro- to macroscopic. How to characterize the trans-scale nature of the process is on the challenging frontiers of solid mechanics. In this paper, a closed trans-scale formulation of damage evolution based on statistical microdamage mechanics is presented. As a case study, the damage evolution in spallation is analyzed with the formulation. Scaling of the formulation reveals that the following dimensionless numbers: reduced Mach number M, damage number S, stress wave Fourier number P, intrinsic Deborah number D*, and the imposed Deborah number De*, govern the whole process of deformation and damage evolution. The evaluation of P and the estimation of temperature increase show that the energy equation can be ignored as the first approximation in the case of spallation. Hence, apart from the two conventional macroscopic parameters: the reduced Mach number M and damage number S, the damage evolution in spallation is mainly governed by two microdamage-relevant parameters: the Deborah numbers D* and De*. Higher nucleation and growth rates of microdamage accelerate damage evolution, and result in higher damage in the target plate. In addition, the mere variation in nucleation rate does not change the spatial distribution of damage or form localized rupture, while the increase of microdamage growth rate localizes the damage distribution in the target plate, which can be characterized by the imposed Deborah number De*. |
学科主题 | 力学 |
类目[WOS] | Materials Science, Multidisciplinary ; Mechanics |
研究领域[WOS] | Materials Science ; Mechanics |
关键词[WOS] | SPALL DAMAGE ; SOLIDS ; METALS |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000233519500007 |
公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
内容类型 | 期刊论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/17512] |
专题 | 力学研究所_力学所知识产出(1956-2008) |
推荐引用方式 GB/T 7714 | Wang HY,Bai YL,Xia MF,et al. Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure[J]. Mechanics of Materials,2006,38(1-2):57-67. |
APA | 汪海英,白以龙,夏蒙棼,&柯孚久.(2006).Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure.Mechanics of Materials,38(1-2),57-67. |
MLA | 汪海英,et al."Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure".Mechanics of Materials 38.1-2(2006):57-67. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论