Dynamic mechanical characteristics of concrete affected by loading rate

doi:10.1179/143307511X12858957676236

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Dynamic mechanical characteristics of concrete affected by loading rate
	Yin, X. T.2; Ding, W. H.1
刊名	MATERIALS RESEARCH INNOVATIONS
	2011
卷号	15 页码:S508-S512
关键词	Particle flow Concrete Loading rate Rupture shape Crack Energy
ISSN号	1432-8917
DOI	10.1179/143307511X12858957676236
英文摘要	Concrete is a typical kind of artificial synthetic material with complex engineering features; the loading rate will result in the change of material rupture shape. There is a critical velocity during the breakage process of materials with a transition from plasticity to brittleness. The uniaxial compression virtual test of numerical concrete with cracking function of the aggregate is done by compiling program by means of embedded fish language under particle flow code condition. The input parameters of the numerical model, i.e. strength and deformation of mortar and aggregate, are tested through tensile strength, compression strength and modulus tests of mortar and concrete, and cohesion strength test of interface between mortar and aggregate. Then, uniaixal compression tests with six different loading rates such as 0.0005, 0.0010, 0.0020, 0.0050, 0.0100 and 0.0200 m s(-1) are designed to study the effect of the loading rate. Moreover, the influence of rupture process, crack number and propagation, curve of stress and strain, energy transformation done by the loading rate is analysed based on these tests. It was found that an increase in the loading rate damages the development of the superior shear zone, which makes the shear zone expand with the same velocity, and the failure of concrete appears as splitting damage with more vertical cracks. The loading rate enhances the mechanical behaviour and deformation features of materials with uplifting of slope and peak value. The total cracks increase with decreasing tensile cracks and increasing shearing cracks. Boundary energy enhances, friction, kinetic and strain energy increase monotonically, which illustrates increases in shear cracks and violent failure and rockburst of side.
WOS研究方向	Materials Science
语种	英语
出版者	MANEY PUBLISHING
WOS记录号	WOS:000288859000125
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3270]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Xian Univ Technol, Inst Geotech Engn 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ;
推荐引用方式 GB/T 7714	Yin, X. T.,Ding, W. H.. Dynamic mechanical characteristics of concrete affected by loading rate[J]. MATERIALS RESEARCH INNOVATIONS,2011,15:S508-S512.
APA	Yin, X. T.,&Ding, W. H..(2011).Dynamic mechanical characteristics of concrete affected by loading rate.MATERIALS RESEARCH INNOVATIONS,15,S508-S512.
MLA	Yin, X. T.,et al."Dynamic mechanical characteristics of concrete affected by loading rate".MATERIALS RESEARCH INNOVATIONS 15(2011):S508-S512.