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Title of Journal: Int J Mater Form

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Abbravation: International Journal of Material Forming

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Springer Paris

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1960-6214

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An investigation into thickness distribution in si

Authors: M J Mirnia B Mollaei Dariani H Vanhove J R Duflou
Publish Date: 2013/08/24
Volume: 7, Issue: 4, Pages: 469-477
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Abstract

Single point incremental forming SPIF needing no dedicated tools is the simplest variant of incremental sheet metal forming processes In the present work a simplified model of SPIF of a truncated cone capable of predicting the thickness distribution has been developed using sequential limit analysis SLA The obtained results were validated experimentally and compared with thickness predictions obtained from an explicit shell FE model implemented in Abaqus It is shown that SLA is capable to solve the thickness prediction problem more accurately and efficiently than the equivalent FEA approach As an application of the proposed model the effect of the diameter of the hemispherical tool tip and the step down on the thickness distribution and the minimum thickness in a 50° cone is studied using SLA By introducing bending and stretching zones in the wall of the cone variations of the minimum thickness by changing the tool diameter and the step down are discussed

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