The Performance of Karafillis-Boyce Yield Function on Determination of Forming Limit Diagrams

Publish Year: 1386
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_IJE-20-1_006

تاریخ نمایه سازی: 20 اسفند 1400

Abstract:

Forming Limit Diagrams are useful tools for evaluation of formability in the sheet metals. In this paper the effects of yield criteria on predictions of the right and left-hand sides of forming limit diagrams (FLDs) are investigated. In prediction of FLD, Hosford ۱۹۷۹, “Karafillis-Boyce” (K-B) and BBC۲۰۰۰ anisotropy yield functions have been applied. Whereas the prediction of FLD is based on the “Marciniak and Kuczynski” model, thus a numerical approach using the Newton-Raphson method has been used. Forming Limit Diagrams have been obtained for Al ۶۱۱۱-T۴ and AA۵XXX alloys and results have been compared with published experimental data. Results indicate that predictions of FLD are very sensitive to selection of yield criterion. Also it was found that the FLD of K-B yield function has a better agreement than that by other yield criteria.

Authors

A. Assempour

Mechanical Engineering, Sharif University of Technology

M. Ganjiani

Mechanical Engineering, Sharif University of Technology