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Tensile strength and toughness of FRC materials
Abstract A new compact tensile test specimen is reported. The test specimen is prepared by the introduction of two notches into a prismatic member. The geometry is loaded through four points in such a way that a zone of high tensile stresses is created along the line joining the roots of the two notches. Experimental results are given for plain concrete, polypropylene FRC and steel FRC. Both the tensile strength and the post-cracking toughness are investigated. The post-cracking toughness is measured by means of two toughness indices. The results show that the tensile strength is increased as the slot separation distance is decreased. This effect may be due to a larger stress concentration being created as the slot separation distance is increased. The tensile strengths recorded for the FRC mixes were relatively independent of fibre content. The toughness index results showed that the post-cracking toughness increased with increasing fibre content. Comparison with flexural testing shows, however, that the toughness in tension is much less than the toughness achieved during flexural testing. Throughout the experimental study, the coefficient of variation was rather high. A detailed comparison of this geometry with other methods of tensile strength determination is recommended.
Tensile strength and toughness of FRC materials
Abstract A new compact tensile test specimen is reported. The test specimen is prepared by the introduction of two notches into a prismatic member. The geometry is loaded through four points in such a way that a zone of high tensile stresses is created along the line joining the roots of the two notches. Experimental results are given for plain concrete, polypropylene FRC and steel FRC. Both the tensile strength and the post-cracking toughness are investigated. The post-cracking toughness is measured by means of two toughness indices. The results show that the tensile strength is increased as the slot separation distance is decreased. This effect may be due to a larger stress concentration being created as the slot separation distance is increased. The tensile strengths recorded for the FRC mixes were relatively independent of fibre content. The toughness index results showed that the post-cracking toughness increased with increasing fibre content. Comparison with flexural testing shows, however, that the toughness in tension is much less than the toughness achieved during flexural testing. Throughout the experimental study, the coefficient of variation was rather high. A detailed comparison of this geometry with other methods of tensile strength determination is recommended.
Tensile strength and toughness of FRC materials
Barr, B. (author) / Asghari, A. (author) / Hughes, T.G. (author)
1988-03-03
7 pages
Article (Journal)
Electronic Resource
English
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