@Article{sdhm.2008.004.067,
AUTHOR = {C.  Colombo, M.  Guagliano, L.  Vergani},
TITLE = {Experimental Assessment of Stress Intensity Factors in Internal Cracks under Mixed-mode Loading},
JOURNAL = {Structural Durability \& Health Monitoring},
VOLUME = {4},
YEAR = {2008},
NUMBER = {2},
PAGES = {67--76},
URL = {http://www.techscience.com/sdhm/v4n2/35003},
ISSN = {1930-2991},
ABSTRACT = {With the aim of experimentally assessing the stress intensity factors under mixed-mode loading along a crack front, the case of an internal elliptical crack is analyzed. An experimental test is performed on a three-dimensional photoelastic model made in epoxy resin. This model contains an inner natural crack, created by thermal shock. The crack is inclined in the cylindrical model, loaded with a tensile stress field.<br/>
Exploiting the characteristics of the epoxy resin, and using the <i>stress freezing technique</i>, it is possible to keep memory of the stresses near to the crack tip, once the specimen is unloaded. The final specimen is cut in slices and <i>K<sub>I</sub>, K<sub>II</sub></i>, and especially <i>K<sub>III</sub></i> are evaluated along the crack front with particular techniques. Comparisons are finally proposedwithrespect to theanalyticalsolutionand the numerical valuesfrom a FEM model.
},
DOI = {10.3970/sdhm.2008.004.067}
}