Crack coalescence behavior of brittle sandstone samples containing two coplanar fissures in the process of deformation failure

This investigation presents crack coalescence behavior of brittle sandstone samples containing two coplanar fissures in the process of deformation. On basis of experimental results, the influence of coplanar fissure angle on strength and deformation behavior of sandstone samples is firstly analyzed. By adopting photographic monitoring, the crack initiation and coalescence are all observed and characterized from the inner and outer tips of pre-existing coplanar fissures in brittle sandstone sample. Moreover, the sequence and type of crack coalescence in sandstone samples containing two coplanar fissures are analyzed. Finally, the relationship between coplanar fissure angle and crack coalescence stress is constructed.

[1]  Yin-Ping Li,et al.  Experimental research on pre-cracked marble under compression , 2005 .

[2]  Seokwon Jeon,et al.  An experimental and numerical study of fracture coalescence in pre-cracked specimens under uniaxial compression , 2011 .

[3]  S. Nemat-Nasser,et al.  Compression‐induced nonplanar crack extension with application to splitting, exfoliation, and rockburst , 1982 .

[4]  K. T. Chau,et al.  Analysis of crack coalescence in rock-like materials containing three flaws—Part I: experimental approach , 2001 .

[5]  Antonio Bobet,et al.  Crack coalescence in specimens with open and closed flaws: A comparison , 2009 .

[6]  Theoretical and numerical study on uniaxial compressive behaviour of marl , 2009 .

[7]  Sheng-Qi Yang,et al.  Experimental study on mechanical behavior of brittle marble samples containing different flaws under uniaxial compression , 2009 .

[8]  Louis Ngai Yuen Wong,et al.  Systematic evaluation of cracking behavior in specimens containing single flaws under uniaxial compression , 2009 .

[9]  K. T. Chau,et al.  Crack coalescence in a rock-like material containing two cracks , 1998 .

[10]  Dongxiao Zhang,et al.  Multi-crack interaction in limestone subject to stress and flow of chemical solutions , 2009 .

[11]  Riccardo Roncella,et al.  Analysis of the failure mechanisms of a weak rock through photogrammetrical measurements , 2008, CP 2013.

[12]  Sheng-qi Yang,et al.  Triaxial mechanical creep behavior of sandstone , 2010 .

[13]  M. Prudencio,et al.  Strength and failure modes of rock mass models with non-persistent joints , 2007 .

[14]  Sheng-Qi Yang,et al.  Strength failure and crack coalescence behavior of brittle sandstone samples containing a single fissure under uniaxial compression , 2011 .

[15]  Yoshiaki Fujii,et al.  Consideration of fracture growth from an inclined slit and inclined initial fracture at the surface of rock and mortar in compression , 2004 .

[16]  H. Einstein,et al.  Experimental study of the cracking behavior of specimens containing inclusions (under uniaxial compression) , 2010 .