Experimental and Numerical Investigation of Residual Stresses in Incremental Forming

Subrahmanyam, Adabala and Lingam, Rakesh and Reddy, N Venkata (2020) Experimental and Numerical Investigation of Residual Stresses in Incremental Forming. In: Materials Transactions.

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Double Sided Incremental Forming (DSIF) is gaining importance over Single Point Incremental Forming (SPIF) due to its ability to form complex geometries and the capability to obtain better accuracies. In the present work, residual stresses are measured in pyramidal components formed using SPIF, DSIF using X-ray diffraction technique. Residual stress development mechanism during SPIF and DSIF is studied using Finite Element Analysis (FEA). Stress development along circumferential and meridional directions are explained using bending and unbending of sheet material taking place around forming tool. It is observed that the residual stresses are compressive on the outer surface and tensile on the inner surface of sheet in both circumferential and meridional directions. In DSIF, supporting tool restricts the unbending of sheet causing the residual stresses to be less compressive on the outer surface and less tensile on the inner surface compared to SPIF. It is also observed that with an increase in tool diameter, spring back increased, hence, meridional residual stress on the outer surface became more compressive and circumferential residual stress on the inner surface became more tensile. Residual stresses in ISF are compared with FEA predictions of conventional stamping process. © 2019 The Japan Institute of Metals and Materials

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IITH Creators:
IITH CreatorsORCiD
Item Type: Conference or Workshop Item (Paper)
Additional Information: Majority of this work is supported by SERB, DST (EMR/2015/000286). IITH thanks travel support by JICA, Japan.
Uncontrolled Keywords: Finite element analysis; Incremental forming; Measurement; Residual stress; X-ray diffraction
Subjects: Physics > Mechanical and aerospace
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Team Library
Date Deposited: 17 Oct 2019 09:00
Last Modified: 03 Nov 2022 14:25
URI: http://raiith.iith.ac.in/id/eprint/6607
Publisher URL: http://doi.org/10.2320/matertrans.MT-ML2019011
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