Prediction and Experimental Verification of the Critical Fracture Blank Holder Force for Deep Drawing of Box-Shaped Parts

نویسندگان

چکیده

In this paper, the deformation law of box-shaped parts drawing was analyzed, and mathematical expression for calculating critical fracture blank holder force (BHF) deduced. order to determine parameters 08Al sheet, notched specimen tensile tests were conducted, full-field strain specimens from obtained by digital image correlation (DIC) technology. The evolution stress triaxiality Lode parameter with plastic obtained, modified Mohr-Coulomb (MMC) criterion fitted least squares method. finite element (FE) simulation model coupled MMC ductile established simulate behavior sheet. reliability theoretical calculation evaluated FE experiments under various process conditions. results demonstrated that prediction BHF both partial safety predictions all earlier than tests. calculation, when flange shrinkage rate 0.19, smallest, error 17.5% compared tests, closer test results. provide a reference value predicting intelligent control in actual production.

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ژورنال

عنوان ژورنال: Materials transactions

سال: 2022

ISSN: ['1345-9678', '1347-5320']

DOI: https://doi.org/10.2320/matertrans.mt-m2022097