Effects of porosity on seismic velocities, elastic moduli and Poisson's ratios of solid materials and rocks

	Effects of porosity on seismic velocities, elastic moduli and Poisson's ratios of solid materials and rocks
	Yu, Chengbo 1; Ji, Shaocheng 1; Li, Qi 2
刊名	Journal of Rock Mechanics and Geotechnical Engineering
	2016
卷号	8 期号:1 页码:35
关键词	Porous rocks Seismic velocities Elastic moduli Poisson's ratio Porosity Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712
ISSN号	1674-7755
英文摘要	The generalized mixture rule (GMR) is used to provide a unified framework for describing Young's (E), shear (G) and bulk (K) moduli, Lame parameter (λ), and P- and S-wave velocities (Vp and Vs) as a function of porosity in various isotropic materials such as metals, ceramics and rocks. The characteristic J values of the GMR for E, G, K and λ of each material are systematically different and display consistent correlations with the Poisson's ratio of the nonporous material (ν0). For the materials dominated by corner-shaped pores, the fixed point at which the effective Poisson's ratio (ν) remains constant is at ν0=0.2, and J(G)>J(E)>J(K)>J(λ) and J(G) 0.2 and ν0 J(Vp) and J(Vs) 0.2 and ν0 0.2 and ν0=0.2, respectively. For natural rocks containing thin-disk-shaped pores parallel to mineral cleavages, grain boundaries and foliation, however, the ν fixed point decreases nonlinearly with decreasing pore aspect ratio (α: width/length). With increasing depth or pressure, cracks with smaller α values are progressively closed, making the ν fixed point rise and finally reach to the point at ν0=0.2.
资助项目	[Natural Sciences and Engineering Council of Canada]
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/26350]
专题	中科院武汉岩土力学所
作者单位	1.Ecole Polytech Montreal, Department Genie Civil Geol & Mines, Montreal, PQ H3C 3A7, Canada 2.中国科学院
推荐引用方式 GB/T 7714	Yu, Chengbo,Ji, Shaocheng,Li, Qi. Effects of porosity on seismic velocities, elastic moduli and Poisson's ratios of solid materials and rocks[J]. Journal of Rock Mechanics and Geotechnical Engineering,2016,8(1):35.
APA	Yu, Chengbo,Ji, Shaocheng,&Li, Qi.(2016).Effects of porosity on seismic velocities, elastic moduli and Poisson's ratios of solid materials and rocks.Journal of Rock Mechanics and Geotechnical Engineering,8(1),35.
MLA	Yu, Chengbo,et al."Effects of porosity on seismic velocities, elastic moduli and Poisson's ratios of solid materials and rocks".Journal of Rock Mechanics and Geotechnical Engineering 8.1(2016):35.