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Trans. Nonferrous Met. Soc. China 26(2016) 2433-2441 Stress based forming limit diagram for formability characterization of 6061 aluminum R. SAFDARIAN Department of Mechanical Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Khoozestan, Iran Received 8 September 2015; accepted 18 January 2016 Abstract: Two numerical criteria of forming limit diagram (FLD) criterion......
Evaluation of forming limit in viscous pressure forming of automotive aluminum alloy 6k21-T4 sheet WANG Zhong-jin(王忠金)1, LI Yi(李 毅)1, LIU Jian-guang(刘建光)1, ZHANG Yi-he(张义和)2 1. School...; Abstract: A ductile fracture criterion is introduced into numerical simulation to predict viscous pressure forming limit of the automotive body aluminum alloy 6k21-T4. The material constant......
Trans. Nonferrous Met. Soc. China 26(2016) 736-746 Influence of material models on theoretical forming limit diagram prediction for Ti-6Al-4V alloy under warm condition Nitin KOTKUNDE1, Sashank... Abstract: Forming limit diagram (FLD) is an important performance index to describe the maximum limit of principal strains that can be sustained by sheet metals till to the onset of localized necking......
; accepted 8 August 2012 Abstract: A modified Swift type flow stress-strain relation was presented in order to describe the uniaxial tension test curve reasonably. The FLD-strain (forming limit diagram made... limit diagram plays an important role on the analysis of plastic forming of sheet metals and has become an indispensable criterion for performance analysis and failure prediction [1-4]. The groove......
words: aluminum-lithium alloy; forming limit diagram; theoretical prediction; M-K model  ... thermo-mechanical finite element models[J]. International Journal of Plasticity, 2007, 23: 841-875. [9] NARAYANASAMYA R, SATHIYA N C. Experimental analysis and evaluation of forming limit diagram......
; forming limit diagram; AA7075-T6 sheet 1 Introduction In the modern automobile manufacture field, in order to decrease automotive body weight and keep sufficient strength, high strength aluminum alloy..., it is significant to effectively predict the occurrence of fracture during the forming process of high-strength aluminum alloy sheets. Forming limit diagram (FLD) can visually show the maximum deformation degree......
样组合方案编号k=20),以及曲面拟合法得到的三组断裂参数绘制AA7075-T6板材理论成形极限曲线,如图9所示. 3.2 成形极限图试验验证 图9 AA7075-T6板材成形极限图 Fig. 9 Forming limit diagram of AA7075-T6 sheet 制备中间宽度为20 mm,30 mm,40 mm和50 mm的 "骨头"试样,以及直径为d 200 mm的圆形试样,如图10所示,并在试样表面电解腐蚀方形网格.试验采取不同的润滑条件:"骨头"试样与冲头之间不做 图10 试样成形极限图的试验验证 Fig. 10 Experimental verification of forming limit diagram of specimens 设计AA7075-T6板材半球形刚模胀形试验,分别润滑;圆形试样与......
, the forming limit diagram (FLD) of VWPB of AZ31B magnesium alloy was obtained through measuring the strain of bulging specimens. The results showed that at the temperature range of viscous medium thermal...; different ellipticity dies; forming limit diagram 1 Introduction With the improvement of energy saving requirements and lightweight technology, the magnesium alloys are widely applied in aviation......
properties are described with elongation, hardenability (n), plastic strain ratio (r), Erichsen number and forming limit diagram (FLD) in this study. The elongation is homogeneous deforming capability... number increases 12%, from 7.83 mm to 8.77 mm. Forming limit diagram characterizes maximum deforming degree before destabilization. Fig.1 shows FLD comparison between alloys A1 and A2. It is clear that FLD......
Trans. Nonferrous Met. Soc. China 26(2016) 2426-2432 Theoretical prediction of forming limit diagram of AZ31 magnesium alloy sheet at warm temperatures Xiao-qing CAO1,2, Ping-ping XU1,2, Qi FAN1,2... University of Technology, Taiyuan 030024, China Received 15 September 2015; accepted 6 May 2016 Abstract: A theoretical prediction on forming limit diagram (FLD) of AZ31 magnesium alloy sheet was developed......