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through-thickness-shear-stress
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Implementation of Shear Stress in M-K Model for Determination of the Limit Strains
, M.Sc. Thesis Sharif University of Technology ; Asempour, Ahmad (Supervisor) ; Hashemi, Ramin (Co-Advisor)
Abstract
One of the most useful methods in metal forming is Sheet Metal Forming. Use of Forming limit diagrams (FLD) in designing is a conventional method. Therefore many experimental and theoretical efforts have been carried out in order to investigate the FLDs. Many ways to obtain this FLDs and their effective parameters have been studied. But the stress state at these studies is planar which lead to an untrue model for several metal forming process such as incremental sheet forming. With this technique, the forming limit curve (FLC) appears in a different pattern, revealing an enhanced formability, compared to conventional forming techniques. Therefore, in this study, the effect of through...
Prediction of FLD for sheet metal by considering through-thickness shear stresses
, Article Mechanics Based Design of Structures and Machines ; 2019 ; 15397734 (ISSN) ; Soleimani, S. S ; Keshavarzzadeh, M ; Habibi, M ; Assempuor, A ; Hashemi, R ; Sharif University of Technology
Taylor and Francis Inc
2019
Abstract
In this study, the effect of through-thickness shear (TTS) stress has been examined on the prediction of forming limit diagrams (FLDs). Determination of the FLD is based on the Marciniak–Kuczynski (M–K) model with some modifications on the stress states for consideration of the TTS stress effects. For solving the equations, the Newton–Raphson method has been used. Furthermore, the Nakazima test has been simulated to investigate the stress state which occurs in the sheet during the test. Results showed that the formability of sheet metal could be better as the through-thickness stress increased. Also, implementation of TTS stress in the present model, the corresponding FLD has better...
Prediction of FLD for sheet metal by considering through-thickness shear stresses
, Article Mechanics Based Design of Structures and Machines ; 2019 ; 15397734 (ISSN) ; Soleimani, S. S ; Keshavarzzadeh, M ; Habibi, M ; Assempuor, A ; Hashemi, R ; Sharif University of Technology
Taylor and Francis Inc
2019
Abstract
In this study, the effect of through-thickness shear (TTS) stress has been examined on the prediction of forming limit diagrams (FLDs). Determination of the FLD is based on the Marciniak–Kuczynski (M–K) model with some modifications on the stress states for consideration of the TTS stress effects. For solving the equations, the Newton–Raphson method has been used. Furthermore, the Nakazima test has been simulated to investigate the stress state which occurs in the sheet during the test. Results showed that the formability of sheet metal could be better as the through-thickness stress increased. Also, implementation of TTS stress in the present model, the corresponding FLD has better...
Prediction of FLD for sheet metal by considering through-thickness shear stresses
, Article Mechanics Based Design of Structures and Machines ; Volume 48, Issue 6 , 2020 , Pages 755-772 ; Soleimani, S. S ; Keshavarzzadeh, M ; Habibi, M ; Assempuor, A ; Hashemi, R ; Sharif University of Technology
Taylor and Francis Inc
2020
Abstract
In this study, the effect of through-thickness shear (TTS) stress has been examined on the prediction of forming limit diagrams (FLDs). Determination of the FLD is based on the Marciniak–Kuczynski (M–K) model with some modifications on the stress states for consideration of the TTS stress effects. For solving the equations, the Newton–Raphson method has been used. Furthermore, the Nakazima test has been simulated to investigate the stress state which occurs in the sheet during the test. Results showed that the formability of sheet metal could be better as the through-thickness stress increased. Also, implementation of TTS stress in the present model, the corresponding FLD has better...