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《Journal of Hefei University of Technology(Natural Science)》 2006-06
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Discussion on the initial fracture toughness K_(IC)~(ini) in the double-K criterion

ZHOU Mei-ling,ZHU Wei-xuan(Dept.of Mechanics,Hohai University,Nanjing 210098,China)  
Some questions concerning initial fracture toughness in the double-K criterion are discussed.The relation between initial fracture toughness and unstable fracture toughness is analyzed as two kinds of typical experiment methods of concrete are utilized.The approximate range of the ratio of initial fracture toughness to unstable fracture toughness is determined.The engineering practicality of concrete's initial fracture toughness is also discussed.
【CateGory Index】: TU375
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