Volume 15, Issue 1 (3-2015)                   Modares Mechanical Engineering 2015, 15(1): 141-150 | Back to browse issues page

‎ 20.1001.1.10275940.1394.15.1.37.3

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
Hossein Pour M, Seyedkashi S H, Shahi S. The Effect of Advanced BBC2003, Yld2004 and BBC2008 Yield Criteria on FLDs Based on M-K, Swift's and Hill's Models. Modares Mechanical Engineering 2015; 15 (1) :141-150
URL: http://mme.modares.ac.ir/article-15-9719-en.html
The Effect of Advanced BBC2003, Yld2004 and BBC2008 Yield Criteria on FLDs Based on M-K, Swift's and Hill's Models
Mohammad Hossein Pour * , S.M. Hossein Seyedkashi , Sepideh Shahi
Abstract:   (5123 Views)
In this paper, effect of advanced yield criteria including BBC2003, Yld2004 and BBC2008 are studied using Swift hardening law on determination of limit strains based on Marciniak–Kuczynski (M-K), Swift’s diffuse necking and Hill’s localized necking models. These models are used to assess the formability prediction of orthotropic AA2090-T3 and AA6111-T4 sheets. The Portevin-Le Chatelier effect on formability of AA5182-O sheet is also studied. The sensitivity of Marciniak–Kuczynski model to the initial imperfection factor is investigated and the effect of this parameter on prediction of forming limit diagram has been shown. Study of the effect of yield criteria exponent on formability shows the higher exponents which are recommended for FCC metals have higher forming limits in comparison with lower exponents adopted to BCC metals. The effects of strain hardening coefficient and anisotropy are studied too. The results show that the increase of strain hardening exponent improves the formability, while the PLC effect and increase of anisotropy coefficient reduce it. Experimental results show better conformity with M-K model at the right side of FLD and with Hill’s localized necking model at its left side.
Keywords: Necking, Plastic instability, PLC effect, Orthotropy, FLD
Full-Text [PDF 941 kb]   (6691 Downloads)    
Article Type: Research Article | Subject: Stress Analysis
Received: 2014/09/1 | Accepted: 2014/10/27 | Published: 2014/11/30
Add your comments about this article : Your username or Email:
CAPTCHA
Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.