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Determination and application of stress-based forming limit diagram in aluminum tube hydroforming ZHOU Lin (周林), XUE Ke-min (薛克敏), LI Ping (李萍) School of Materials Science and Engineering, Hefei... diagram(FLSD) established with limit stress is independent of the strain paths. Compared with traditional strain-based forming limit diagram(FLD), it is more convenient and practical to use......
: nickel coating; instability criterion; forming limit diagram; sheet metal forming  ... for the calculation of the instable eigen values were deduced. The forming limit diagrams of the nickel coating on the right region were plotted. It is exhibited that the forming limit of the coating sheet......
, the forming of AA7075 cylindrical parts by HGMF process is taken as an example to establish the constitutive relation and forming limit diagram (FLD) of AA7075 sheet which is related to temperature... process. Key words: granule medium; aluminum alloy sheet; drawing; hot forming; forming limit diagram 1 Introduction Flexible-die thermoforming technology on light alloy sheet, as an advanced......
. Key words: magnesium alloy sheet; repeated unidirectional bending; texture; formability; forming limit diagram 1 Introduction As the lightest metal structural material, magnesium alloys have been... the concept of forming limit diagram (FLD) in 1963, it has subsequently been widely referenced in the sheet metal forming industry. Now it is a standard criterion for fracture prediction in the sheet......
Prediction of Forming Limit Diagrams for Materials with HCP StructureSheng-Hua Wu1,Nan-Nan Song2,Francisco M.Andrade Pires1,Abel D.Santos1,21. Faculty of Engineering, University of Porto2. INEGI, University of Porto摘 要:The forming limit diagram(FLD) is an important tool to be used when characterizing the formability of metallic sheets used in metal......
away from the curve obtained from bulging through circular die. The forming limit diagram in the range of positive minor strain of a DC04 sheet steel is also determined by using bulge test. Key words: hydraulic bulge test; stress-strain curves; forming limit diagram 1 Introduction The most important advantage of the hydraulic bulge test is the absence of the contact (the frictional interactions......
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with increasing the thickness of polyethylene core. Key words: AA5052 aluminum alloy; sandwich sheets; polyethylene; formability; forming limit diagram 1 Introduction With the gradual requirement of fuel... arc-shaped specimen had one specific strain path on the forming limit diagram (FLD) with the same lubricant (polytetrafluoroethene), and the circle specimens deformed with different lubricants (dry......
was then measured.Key words:finite element method; SPCC; deep-drawing; forming limit diagram criterion; Taguchi’s method; earring prediction... the test of stress-strain and forming limit curves were used as input into ABAQUS/Explicit finite element code to predict the failure occurrence of deep drawing process. The three parameters were......
, ZENG Pan Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China Received 28 August 2012; accepted 25 October 2012 Abstract: The forming limit diagram (FLD) and forming limit...; forming limit diagram (FLD); forming limit stress diagram (FLSD); hardening laws; yield criterion 1 Introduction Fracture and wrinkle are common defects of sheet metal forming. The researchers devote......