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	Strength and elastic properties of sandstone under different testing conditions
	Chen Yun-ping ; Wang Si-jing ; Wang En-zhi
	2010-05-11 ; 2010-05-11
关键词	strain rate strength deformation modulus Poisson ratio softening coefficient rock STRESS ROCK Metallurgy & Metallurgical Engineering
中文摘要	A laboratory experimental program performed on Wuhan sandstones was presented under monotonic loading, partial cyclic loading during loading path and sine wave cyclic loading with different strain rates to compare uniaxial compression strength and elastic properties (elastic modulus and Poisson ratio) under different conditions and influence of pore fluid on them. When the loading strain rates are 10(-5), 10(-4) and 10(-3)/s, uniaxial compression strengths of dry sandstones are 82.3, 126.6 and 141.6 Mpa, respectively, and that of water saturated sandstones are 70.5, 108.3 and 124.1 MPa, respectively. The above results show that the uniaxial compression strength increases with the increase of strain rate, however, variation of softening coefficient is insignificant. Under monotonic loading condition, tangent modulus increases with an increment of stress (strain) to a maximum value at a certain stress level, beyond which it starts to decline. Under the partial cyclic loading during loading path condition, unloading or reloading modulus is larger than loading modulus, and unloading and reloading moduli are almost constants with respect to stress level, especially unloading modulus. Under the sine wave cyclic loading condition, tangent modulus and Poisson ratio display asymmetric 'X' shape with various strain, and the average unloading modulus is larger than the average loading modulus.
语种	英语 ; 英语
出版者	JOURNAL OF CENTRAL SOUTH UNIV TECHNOLOGY ; HUNAN ; EDITORIAL OFFICE, CHANGSHA, HUNAN 410083, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27470]
专题	清华大学
推荐引用方式 GB/T 7714	Chen Yun-ping,Wang Si-jing,Wang En-zhi. Strength and elastic properties of sandstone under different testing conditions[J],2010, 2010.
APA	Chen Yun-ping,Wang Si-jing,&Wang En-zhi.(2010).Strength and elastic properties of sandstone under different testing conditions..
MLA	Chen Yun-ping,et al."Strength and elastic properties of sandstone under different testing conditions".(2010).

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