Research on the Influences of Crack-Depth Ratio on Fracture Energy of Ultra-High Performance Cementitious Composites

Abstract:

For the study of fracture characteristics of ultra-high performance cementitious composites(ECC),16 different sizes of three-point bending beams were made and ultimate load, ultimate deflection and crack mouth opening displacement ,the curve andcurve of ECC were contructed,with the method of fracture work recommendedby RILEM , the external work was respectively calculated by the curve ofand, which determined the fracture energy of ECC.Results show that two kinds of calculation result are roughly equal;The influence of size effect on fracture character was: fracture energy increased with the increasing of the crack-depth ratio, the fracture energy of concrete specimen is the maximum when the crack-depth ratio is 0.4 ; is proportional to the initial crack-depth of the specimen, but there is no relationship betweenand crack-depth ratio. This paper would have great significance for the study of fracture characteristics of ECC.

• Periodical: Applied Mechanics and Materials (Volumes 744-746)
• Pages: 1467-1472
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.744-746.1467
• Online since: March 2015
• Authors: Hai Chao Wang*, Long Long Liu, Shu Ling Gao, Zhi Gang Yang
• Keywords: Crack-Depth Ratio, Fracture Energy, Three-Point Bending Beam, Ultimate Deflection, Ultimate Load

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