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DOI	10.1016/j.tecto.2021.228865
	Effects of stress path on brittle failure of sandstone: Difference in crack growth between tri-axial compression and extension conditions
	Panaghi K.; Takemura T.; Asahina D.; Takahashi M.
发表日期	2021
ISSN	00401951
卷号	810
英文摘要	The tri-axial testing of rocks under compression is a widely popular measure for the assessment of strength of geological materials in the laboratory. In this regard, mechanical complexities of true tri-axial testing machines impel researchers to opt for simpler conventional tri-axial testing machines. To account for influential factors that affect quality of experimental data, observations derived from laboratory experiments that enable overcoming some drawbacks are presented herein. In the present study, a series of tri-axial tests on Kimachi sandstone under Conventional Tri-axial Compression (CTC), Conventional Tri-axial Extension (CTE), Reduced Tri-axial Compression (RTC), and Reduced Tri-axial Extension (RTE) conditions were carried out. The results suggested higher compressive strengths for the rock under tri-axial extension tests than the compression tests. This observation proves that the effect of intermediate confining pressure on material behavior is important and if feasible, should not be sacrificed for more economical alternatives. Generally, the loading and unloading experiments for a specific test type rendered the same results and the conventional and reduced paths in both the compression and extension tests did not affect the failure strength of the specimens. The effect of pre-existing cracks orientation with respect to the principal loading directions on crack growth was focused upon and related conclusions were subsequently drawn. © 2021 Elsevier B.V.
关键词	Compression and extension Intermediate stress Stress distribution Stress path Tri-axial test
英文关键词	Axial compression; Compression testing; Cracks; Failure (mechanical); Materials testing apparatus; Sandstone; Unloading; Confining pressures; Geological materials; Influential factors; Laboratory experiments; Loading and unloading; Material behavior; Mechanical complexity; Pre-existing crack; Compressive strength; brittle failure; complexity; compression; deformation mechanism; rock mechanics; sandstone; stress analysis; stress field; testing method; triaxial test
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208046
作者单位	Department of Civil and Architectural Engineering, School of Science and Engineering, University of Kurdistan Hewlêr, 30 Meter Avenue, Erbil, Kurdistan Region, Iraq; Geomechanics Lab., Department of Earth and Environmental Sciences, College of Humanities and Sciences, Nihon University, 3-25-40 Sakurajyosui, Setagaya-ku, Tokyo 156-8850, Japan; Geological Survey of Japan, AIST, Ibaraki, 305-8567, Japan
推荐引用方式 GB/T 7714	Panaghi K.,Takemura T.,Asahina D.,et al. Effects of stress path on brittle failure of sandstone: Difference in crack growth between tri-axial compression and extension conditions[J],2021,810.
APA	Panaghi K.,Takemura T.,Asahina D.,&Takahashi M..(2021).Effects of stress path on brittle failure of sandstone: Difference in crack growth between tri-axial compression and extension conditions.Tectonophysics,810.
MLA	Panaghi K.,et al."Effects of stress path on brittle failure of sandstone: Difference in crack growth between tri-axial compression and extension conditions".Tectonophysics 810(2021).