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• W4318014906 endingPage "107090" @default.
• W4318014906 startingPage "107090" @default.
• W4318014906 abstract "Incremental sheet forming (ISF) is known for many advantages over conventional forming, such as part flexibility, low tooling cost and higher formability. Previously various studies have explored the failure mechanism experimentally and numerically. However, limited studies have been performed on the micro-mechanics of failure during ISF process. This study involves failure mechanism during incremental sheet forming of a commercial purity aluminum alloy (AA1050). During experiments, failure (fracture) was observed in truncated cone specimens by increasing the wall angle from 71° to 72°. The mechanism behind failure was explored with detailed microstructural characterization and finite element (FE) simulations. Various samples were taken from the successfully formed and failed cones for microstructural analysis. The electron backscatter diffraction (EBSD) based microtexture measurements associate this failure with more grain fragmentation and necking or localized deformation in the failed cone. Further, the X-ray diffraction (XRD) based residual stress measurements indicate high positive (tensile) hydrostatic stresses (∼157 MPa) on the outer surface of the failed (fractured) cones. Finite element analysis (FEA) with Gurson-Tvergaard-Needleman (GTN) damage model was used for fracture prediction. The FEA results also support the residual hydrostatic stress evolution in the cones, albeit at a slightly different wall angle. Based on microstructural and finite element analysis it is concluded that deformation becomes inhomogeneous when the failure occurs during ISF process." @default.
• W4318014906 created "2023-01-26" @default.
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• W4318014906 date "2023-04-01" @default.
• W4318014906 modified "2023-10-03" @default.
• W4318014906 title "Failure mechanism during incremental sheet forming of a commercial purity aluminum alloy" @default.
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• W4318014906 doi "https://doi.org/10.1016/j.engfailanal.2023.107090" @default.
• W4318014906 hasPublicationYear "2023" @default.
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