ISSN:
0894-9166
Keywords:
rock fracture
;
compression shear fracture
;
rock damaged zone
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract This paper presents the research results concerning the microcracking zone near the notch tip in rock by compressive shear fracture specimen. By the white light speckles method, photoelastic coating test and microscopic observation on rock slices, it is has been found that the said microcracking zone is of asymmetric mulberry leaf shape and the rock grains in the zone are broken so as to form many cracks. In addition, a full field displacement pattern is obtained. The tests also demonstrate that the principal fracture plane of the rock in the compressive shear state is to propagate along the boundary plane of the microcracking zone. Finally, this paper gives a shape equation which describes the microcracking zone, of fracture nucleus for the rock under compression and shear.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02207454
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