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- W2967381541 endingPage "103685" @default.
- W2967381541 startingPage "103685" @default.
- W2967381541 abstract "The ductile fracture of an AA6111 aluminum sheet after a thermal cycle typical of auto-body paint-baking is investigated with the hybrid experimental-numerical method. The plastic flow of the material is examined by uniaxial tension, plane-strain tension, disk-compression and notched-tension experiments, that are used to calibrate the Yld2004-18p anisotropic yield criterion and the combined Swift-Voce hardening model. Then, the fracture behavior under equibiaxial and plane-strain tension, as well as uniaxial tension and shear, is characterized using a specially-developed cruciform specimen, along with center-hole and shear specimens, respectively. The cruciform fracture specimen proposed here contains two shallow hemispherical depressions (dimples) in the test-section, to initiate fracture. For the fracture characterization, special emphasis is put on specimen design, so that the stress states developed at the neighborhood of the fracture initiation point remain proportional throughout the loading history. In all experiments, the surface strain fields are measured by a stereo-type digital image correlation system. This information is used to validate finite element simulations of the fracture experiments. It is found that the Yld2004-18p model provides a better agreement with experiments than von Mises does, which underscores the sensitivity of the hybrid method to the plasticity models adopted. Once validated, these simulations are used to obtain the fracture loci in terms of two stress-state metrics, i.e., the stress triaxiality and Lode angle parameter." @default.
- W2967381541 created "2019-08-22" @default.
- W2967381541 creator A5022737280 @default.
- W2967381541 creator A5040744131 @default.
- W2967381541 creator A5083460004 @default.
- W2967381541 date "2019-11-01" @default.
- W2967381541 modified "2023-10-11" @default.
- W2967381541 title "Ductile fracture of an aluminum sheet under proportional loading" @default.
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- W2967381541 doi "https://doi.org/10.1016/j.jmps.2019.103685" @default.