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A Possible Method for Obtaining Fracture Parameters for Crack Propagation in Quasi-Brittle Materials Subject to Compression
Quasi-brittle engineering materials contain flaws such cracks, pores, voids and fissures. Mode I cracking from such pre-existing flaws is the major cause of brittle fracture of these materials in compression. It is commonly accepted that that failure in uniaxial compression is characterized by multiple cracks propagating parallel to the direction of compression, whereas brittle failure in tension is typified by the propagation of a single crack. The energetics of crack propagation in compression are clearly different to those in tension. We report on a method used to study compressive fracture of concrete and masonry with a single crack. Pre-set cracks with different shapes of crack tip were placed in specimens. These specimens were tested to study their effect on compressive fracture. Specimens with cylindrical pre-set cracks failed with a single crack parallel to the compression.
A Possible Method for Obtaining Fracture Parameters for Crack Propagation in Quasi-Brittle Materials Subject to Compression
Quasi-brittle engineering materials contain flaws such cracks, pores, voids and fissures. Mode I cracking from such pre-existing flaws is the major cause of brittle fracture of these materials in compression. It is commonly accepted that that failure in uniaxial compression is characterized by multiple cracks propagating parallel to the direction of compression, whereas brittle failure in tension is typified by the propagation of a single crack. The energetics of crack propagation in compression are clearly different to those in tension. We report on a method used to study compressive fracture of concrete and masonry with a single crack. Pre-set cracks with different shapes of crack tip were placed in specimens. These specimens were tested to study their effect on compressive fracture. Specimens with cylindrical pre-set cracks failed with a single crack parallel to the compression.
A Possible Method for Obtaining Fracture Parameters for Crack Propagation in Quasi-Brittle Materials Subject to Compression
Xiao, X. (author) / Shrive, N. G. (author)
Structures Congress 2010 ; 2010 ; Orlando, Florida, United States
Structures Congress 2010 ; 1949-1958
2010-05-18
Conference paper
Electronic Resource
English
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