An analysis of dynamic fracture in concrete with a continuum visco-elastic visco-plastic damage model

被引：86
|
作者：
Pedersen, R. R. [1 ]
Simone, A. [1 ]
Sluys, L. J. [1 ]
机构：
[1] Delft Univ Technol, Fac Civil Engn & Geosci, NL-2600 GA Delft, Netherlands
来源：
ENGINEERING FRACTURE MECHANICS | 2008年 / 75卷 / 13期
关键词：
visco-elasticity; Stefan effect; visco-plasticity; damage;
D O I：
10.1016/j.engfracmech.2008.02.004
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
We present a rate-dependent continuum model for the dynamic modelling of concrete. Rate dependency is included by means of visco-elastic and visco-plastic constitutive relationships. The inclusion of the Stefan effect, described by a viscoelastic model, results in an increased tensile strength with increasing loading rate. An additional rate effect comes from the visco-plastic contribution which, from a mechanical standpoint, can be related to the micro-inertia of the material surrounding the crack tip. Static and dynamic examples show the capabilities of the model with respect to localization, hysteresis and dissipation of energy. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3782 / 3805
页数：24
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