INSTITUTIONAL DIGITAL REPOSITORY

Reprint of: residual stress inclusion in the incrementally formed geometry using fractal geometry based incremental toolpath (FGBIT)

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dc.contributor.author Nirala, H. K.
dc.contributor.author Agrawal, A.
dc.date.accessioned 2021-08-02T04:39:17Z
dc.date.available 2021-08-02T04:39:17Z
dc.date.issued 2021-08-02
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/2326
dc.description.abstract Single Point Incremental Sheet Forming (SPISF) is a well-known flexible alternative to conventional generative manufacturing processes. In SPISF, the geometry to be formed is fragmented into series of 2D slices and the plastic deformation is achieved through layer by layer movement of a Numerically Controlled (NC), hemispherical or ball end forming tool. The whole plastic deformation is the sum of all localized strains developed during each increment. Spiral, constant z incremental toolpaths, and their variants are common conventional toolpaths for SPISF. Several researchers have investigated these toolpaths extensively. Fractal Geometry Based Incremental Toolpath (FGBIT) is a recently developed toolpath for SPISF that improves the process formability and stress distribution. Unlike conventional toolpaths, FGBIT deforms the base region of the formed geometry which induces work hardening and residual stresses into the work piece. This may lead to the forming of high strength components. The residual stress distribution over the base region of the formed component (square cup) has been investigated in this study. Further, a comparison based on residual stress distribution between FGBIT and conventional incremental toolpaths is presented. Residual stresses have been measured by using nanoindentation technique. Pile up generation near the periphery of the indent is investigated for conventional and FGBIT based toolpaths. It has been observed from the experimental results that, the strength of the formed component increases due to induced compressive surface residual stresses while using FGBIT hence, metal components with high fatigue life and better strength-to-weight ratio can be formed. en_US
dc.language.iso en_US en_US
dc.subject Single Point Incremental Sheet Forming (SPISF) en_US
dc.subject Computer numerical control (CNC) en_US
dc.subject Conventional toolpaths en_US
dc.subject Fractal Geometry Based Incremental Toolpath(FGBIT) en_US
dc.subject Nanoindentation en_US
dc.subject Residual stress en_US
dc.title Reprint of: residual stress inclusion in the incrementally formed geometry using fractal geometry based incremental toolpath (FGBIT) en_US
dc.type Article en_US


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