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Experimental research on pre-cracked marble under compression
Li, YP; Chen, LZ; Wang, YH

An experimental approach on propagation and coalescence of pre-existing cracks (fractures) in marble samples under compression is carried out. Two types of newborn cracks are observed: wing (tensile) cracks and secondary (shear) cracks. Both types of cracks initiate from the tips of the fractures and propagate in a stable manner. Wing cracks initiate at an angle with the fractures and tend to propagate towards the direction of the most compressive stress. Secondary cracks, however, initiate in a direction quasi-coplanar to the fractures and also parallel to the wing cracks but in the opposite direction. The orientations and geometries of fractures can decide which kind of wing cracks and secondary cracks will be produced. The interactions between fractures strongly affect the initiation and propagation of wing cracks and secondary cracks, and make examples' failure patterns thoroughly different. The initial fracture angles of wing cracks range among 52degrees-68degrees, which are lower than the results (about 77degrees) of previous experiments on molding materials. In addition, the characters of acoustic emission (AE) of pre-cracked marble samples are also studied. For some rock samples, a secondary peak value phenomenon of AE counts is observed. For the samples with zigzag fractures, the accumulated AE counts at the moment of failure occupy almost half of the summation of whole load processes. This reveals that the failure of materials with zigzag fractures is more unexpected. (C) 2004 Published by Elsevier Ltd.

KeywordWing Crack Secondary Crack Coalescence Acoustic Emission Marble
Indexed BySCI
WOS Research AreaMechanics
WOS SubjectMechanics
WOS IDWOS:000226947800003
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Cited Times:345[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
AffiliationShanghai Jiao Tong Univ, Sch Civil Engn & Mech; Chinese Acad Sci, Wuhan Inst Rock & Soil Mech, Key Lab Geomech; Huazhong Univ Sci & Technol, Sch Civil Engn
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GB/T 7714
Li, YP,Chen, LZ,Wang, YH. Experimental research on pre-cracked marble under compression[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2005,42(9-10):2505-2516.
APA Li, YP,Chen, LZ,&Wang, YH.(2005).Experimental research on pre-cracked marble under compression.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,42(9-10),2505-2516.
MLA Li, YP,et al."Experimental research on pre-cracked marble under compression".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 42.9-10(2005):2505-2516.
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