Accession Number : AD0452318


Title :   FRACTURE CHARACTERISTICS OF SEVERAL HIGH STRENGTH ALUMINUM ALLOYS USING VARIABLE NOTCH ROOT RADII,


Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA


Personal Author(s) : Mulherin, Joseph H


Report Date : Sep 1964


Pagination or Media Count : 38


Abstract : A relationship between the stress concentration factor and the fracture toughness parameter was examined for the case of an elliptical hole in an infinite solid. Edge-notched specimens from three high-strength aluminum alloys were tensile loaded to failure. The resulting data from these tests were analyzed, using this relationship. It was indicated that the predicted proportionality between the fracture toughness parameter and the square root of the notch root radius does exist. Further examination of the relationship showed that the fracture occurs at a fixed state of strain within a plastic zone having a size proportional to the original root radius. A departure, however, from the predicted behavior was evident with the introduction of plane strain components at the notch root. This is also discussed. (Author)


Descriptors :   *ALUMINUM ALLOYS , *FRACTURE(MECHANICS) , FRACTURE(MECHANICS) , STRESSES , TOUGHNESS , SHEETS , TEST METHODS , EXPERIMENTAL DATA , ELASTIC PROPERTIES , STRAIN(MECHANICS) , STEEL , MECHANICAL PROPERTIES


Distribution Statement : APPROVED FOR PUBLIC RELEASE