Failure Behavior of Aluminum Alloys Under Different Stress States

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This chapter analyzes the current state of the art on ductile damage in aluminum alloys. To this end, the main experimental methodologies developed to date for this purpose are identified and introduced. The analysis of failure in this type of materials is rather complex and requires the consideration of two parameters dependent on the stress state: triaxiality and Lode parameter. Different values of triaxiality and Lode parameter can be obtained by properly defining the testing load and the specimen geometry. These results are especially interesting to feed constitutive and failure models such as the Johnson-Cook model or the Bai-Wierzbicki model. This chapter focuses on different stress states associated to different Lode parameter and triaxialities: tension, compression, shear, and combined tension-torsion. To this end, a wide variety of testing specimens are introduced describing their relation to these parameters. Thus, this content aims at providing guidance for characterization testing of ductile fracture of metals and further calibration of failure models. The chapter first introduces fundamental concepts, then a brief description of failure models, and, finally, a detailed methodological description on the characterization of metals at different triaxialities and Lode parameters.
Triaxiality, Lode parameter, Johnson and Cook, Ductile failure criterion, Tension stress, Bridgman, Grooved flat specimen, Dog-bone specimen, Uniaxial compression, Shear specimens, Arcan specimens, Equi-biaxial test, Butterfly specimen, Punch test, Hasek tests, Modified shear specimen, Double notched tube specimen, 5754-H111, 6082-T6;2024-T3, Modified Lindholm specimen
Bibliographic citation
Handbook of Damage Mechanics: Nano to Macro Scale for Materials and Structures. New York: Springer, 2020. Pp. 1-25.