Measurement of Specific Fracture Energy and Surface Tension of Brittle Materials in Powder Form |
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Authors: | Petr Jandacka Libor M Hlavac Vilem Madr Jindrich Sancer Frantisek Stanek |
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Affiliation: | (1) Department of Civil Engineering, Indian Institute of Technology, Kharagpur, 721 302, India |
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Abstract: | Studies of the influence of specimen geometry and size–effect on the K
R
–curves and the related fracture parameters were carried out by the authors (Kumar and Barai 2008b). The present paper is
a supplementary contribution and reports interesting results related to the effect of the loading condition and size–effect
studies on the K
R
–curves associated with the cohesive stress distribution for complete fracture process, the double–K fracture parameters, the CTOD–curves and the process zone length using two different loading conditions (i.e., three–point
bending test and four–point bending test). The laboratory size specimen with initial–notch length/depth ratios 0.3 and 0.5
are considered in the work. The load–crack opening displacement curves for these loading conditions are obtained using well
known version of fictitious crack model. |
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Keywords: | fictitious crack extension K R" target="_blank">R – curve weight function size– effect |
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