ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
To study the fracture energy of materials, the stable crack propagation must be observedduring the test. To this end, an appropriate method, particularly in the case of large samples, is thewedge splitting method. By this method, the test machine stores less elastic energy, facilitatingstable propagation. The materials tested in this study were mortars with sand:cement ratios of 2:1and 3:1. Two types of samples were prepared: one with a notch and grooves produced with adiamond disk and the other with notch and grooves produced directly during molding of the mortar.The crack moved easily along an imaginary vertical plane defined by the grooves. The methodologyproved sensitive to the material’s microstructure, modified here by varying its formulation. Highsensitivity was also found in relation to the shape of the tip of the notch, whether V-shaped orsquare. In the material studied here, the values of fracture energy varied from 23 to 56 J.m-2
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.882.pdf
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