(PDF) Numerical study of strain-rate effect in cold rolls

Conclusion This study is focussed on a strain-rate effect in longitudinal strain of the CRF process of steel sheets.The strain-rate dependency of a plastic behaviour observed in most metals can affect the finished products quality as well as process parameters hence the influence of the forming speed on the strain distribution should be explored.Author Bhargava Marrapu,Vivek Kumar Barnwal,Vivek Kumar Barnwal,Shanta Chakrabarty,Asim Tewari,Sushil Estimated Reading Time 11 minsPublish Year 2020Failure Strain and Fracture Prediction During Shock Tube Apr 19,2021·The present study deals with both numerical and experimental evaluation of failure strain and fracture pattern during shock tube impact forming of 1.5 mm thick AA 5052-H32 sheet.A hemispherical end nylon striker is propelled to deform the sheet at different velocities.Author Saibal Kanchan Barik,R.Ganesh Narayanan,Niranjan SahooPublish Year 202112345Next

Cited by 108Publish Year 2011Author Patricia Verleysen,Jan Peirs,Joost Van Slycken,Koen Faes,Laurent DucheneEffect of strain rate on the forming behaviour of sheet

Abstract.The strain rate dependence of plastic yield and failure properties displayed by most metals affects energies,forces and forming limits involved in high speed forming processes.This paper investigates the influence of the strain rate on the forming properties of one laboratory made and three commercial steel grades a CMnAl TRIP steel,the ferritic structural steel S235JR,the drawing steelCited by 108Publish Year 2011Author Patricia Verleysen,Jan Peirs,Joost Van Slycken,Koen Faes,Laurent DucheneEffect of strain rate on the forming behaviour of sheet Verleysen investigated effect of strain rate on the 58 forming behaviour of sheet metals and describe the materials' stress-strain curves using 59 Johnson-Cook model.Ericeand Gálvez presented aCited by 12Publish Year 2004Author Daoming Li,Amit K.GhoshInfluence Of The Plastic Material Behaviour On The May 17,2007·Prediction of forming limit curves with classical material models can already demonstrate that the forming limits are influenced by this strain path change effect.Including the effect of strain rate on the plastic material behaviour has a strong influence in prediction of onset of instability.

Cited by 15Publish Year 1980Author D.V.WilsonEffects of Temperature and Strain Rate on the Forming

of strain rate,consequently,the forming limit curve at 300 ºC is close to that at room temperature.Considering that the relatively little difference in strain rate at 750 mm/s and 1000 mm/s,only the forming.limit curves at 10 and 1000mm/s are compared to discuss the effect of strain rate on forming limit curves.Cited by 19Publish Year 1980Author J.H.Percy,R.H.BrownStrain-rate sensitivity and effects of strain rate in Jul 19,2013·The strain-rate dependencies of flow strength and strain-hardening behaviour are particularly important in sheet-forming operations because they influence strain distribution and necking resistance.Cited by 22Publish Year 1982Author P.Broomhead,R.J.GrieveEffects of Strain Rate and Temperature in Forming Usually the effect of strain rate on the flow stress of metals is not significant at low temperature and becomes significant as the temperature rises.When the strain rate effect is significant,the forming pressure is lowered by decreasing the strain rate.In isothermal forming,in which the tools are heated to the same temperature as the billet in order not to cool down the billet,a low forming velocity is employed to reduce the forming

Cited by 2Publish Year 2017Author Yu Lei,Yu Lei,Shangyu Huang,Shangyu Huang,Zhenghua Meng,Jianhua Hu,Mengcheng ZhouForming limit diagram of metal sheet in actual strain

Since the actual strain path in the sheet metal forming is not always linear,thus the FLDs that are obtained The behaviour of the material can Ghosh,A.K.The influence of strain hardening and strain rate sensitivity on sheet metal forming.Trans.ASME,July,pp.264-274,1977.[l 01 Burford,D.A.Cited by 4Publish Year 2014Author Cunsheng Zhang,Cunsheng Zhang,Xingrong Chu,Dominique Guines,Lionel Leotoing,Jie Ding,Guoqun ZhNumerical study of strain-rate effect in cold rolls The strain-rate dependency of a plastic behaviour observed in most metals can affect the finished products whereas forming speed and friction at roll-sheet interface represents the DETERMINATION OF THE HIGH STRAIN RATE FORMINGprocesses.In this contribution a technique is presented to assess the influence of the strain rate on the forming properties of steel sheets.In a first step,static and high strain rate tensile experiments are carried out in order to characterize the materials strain rate dependent behaviour.

Effect of strain rate on the forming behaviour of sheet

Aug 01,2011·Since the strain rate has an influence on both the plastic flow stresses and the ductility of materials,important parameters such as forming forces,energies and forming limits will be affected by the rate of deformation.Static forming limit diagrams are traditionally obtained through Marciniak or bulge tests.Effect of strain rate on the forming behaviour of sheet metalsJan 02,2017·Verleysen,Patricia,Jan Peirs,Joost Van Slyken,et al.Effect of Strain Rate on the Forming Behaviour of Sheet Metals. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 211.8 (2011) 14571464.Print.Effect of strain rate on the forming behaviour of sheetHigh strain rate tensile experiments are carried out Johnson-Cook and Voce model parameters determined Experimental results are used to calculate FLDs based on Marciniak-Kuczynski model Forming limit diagrams show a non-negligible effect of the strain rate DC04 FLD shifts downwards with increasing strain rate

Effect of strain-rate on forming limit in biaxial

Abstract High-speed biaxial stretching apparatus was developed,where the punch was driven by a drop weight.Effect of the strain-rate on the forming limit strain of thin aluminum A1050 and A5052 sheets was inspected for various strain ratios.Strain-rate was about 100 /s in the high-speed test.It was from 0.0003 to 0.1 /s in the low-speed test.Effect of warm forming conditions on AZ31B flow behaviour Effect of warm forming conditions on AZ31B flow behaviour and microstructural characteristics.International Journal of Material Forming,2011 Effect of warm forming conditions on AZ31B flow behaviour and microstructural characteristics. Modified texture and room temperature formability of magnesium alloy sheet by Li addition.Effects of Strain Rate and Temperature on the Work ·[6] P.Verleysena,et al.,Effect of strain rate on the forming behaviour of sheet metals,Journal of Materials Processing Technology,2011 [7] B.Rossi Mechanical behavior of ferritic grade 3Cr12 stainless steel--Part 2 Yield locus and hardening laws,ScienceDirect 2010

Effects of Strain Rate and Temperature on the Work

2003-01-0516 Effects of Strain Rate and Temperature on the Work Hardening Behavior of High Strength Sheet Steels Todd M.Link and Brandon M.HanceEffects of biaxial tensile on the deformation behavior of Dec 14,2017·The pre-strain in the same direction of high rate increased the forming limit of the final deformation under complex strain paths conditions,but the pre-strain in the vertical direction decreased the minor strain under the high strain rate.Effects of temperature and blank holding force on biaxial Jun 01,2004·Biaxial forming behavior is investigated for three aluminum sheet alloys (Al 5182 containing 1% Mn (5182+Mn),Al 5754,and 6111-T4) using a heated die and punch in the warm forming temperature range of 200350 °C.It is found that,while all three alloys exhibit significant improvement in their formability compared with that at room temperature,the non-heat-treatable alloys 5182 + Mn and

Estimated Reading Time 10 minsEffect of strain rate on the forming behaviour of sheet

The investigation about strain rate effects on forming limit diagrams conducted by Verleysen et al.[16] shows a non-negligible effect of the strain rate.The increase of strain rates on the S235 Estimated Reading Time 12 minsSome strain-rate and anisotropy effects in the stretch DOI 10.1016/0020-7357(65)90005-3 Corpus ID 110789760.Some strain-rate and anisotropy effects in the stretch-forming of steel sheet @article{Bramley1965SomeSA,title={Some strain-rate and anisotropy effects in the stretch-forming of steel sheet},author={A.Bramley and P.Mellor},journal={International Journal of Machine Tool Design and Research},year={1965},volume={5},Experimental and Numerical Analysis on Dual Phase Steel Nov 05,2020·The present study is aimed at analyzing the forming behavior and microstructure evolution of a dual phase steel,DP780,at different strain paths.The forming behavior of this steel was analyzed in terms of forming limit diagram (FLD) using Nakazima tests and finite element method.Various necking criteria were used to construct the FLD.

High Strain Rate Behavior of Steel Alloy for Sheet

High Strain Rate Behavior of Steel Alloy for Sheet Metal Forming Processes Graziano Ubertalli 1 ,Paolo Matteis 1 ,Sara Ferraris 1,*,Caterina Marcianò 2 ,Fabio DAiuto 3 ,MATERIAL BEHAVIOR IN METAL FORMINGtemperatures of hot working,flow stress depends on strain rate.The effect of strain rate on strength properties is known as strain-rate sensitivity.The effect can be seen in Figure.As strain rate is increased,resistance to deformation increases.This usually plots approximately asOVERVIEW AND ASSESSMENT OF FORMABILITY EFFECTof sheet metals is greater,the thinning should be smaller and thus the formability is better.However,a greater r-value does not satisfy all sheet metal forming processes such as necking and bending,meaning that each forming process should have individual forming properties related

The Effect of Strain Rate on the Forming Limit Diagram for

Jan 01,1980·Necking is strongly dependent on the strain hardening exponent,lower values leading to earlier failure.Test results show that the strain hardening exponent falls as the strain rate increases.A proportionate reduction in the forming limit does not occur,however.The Effect of Strain Rate on the Strain to Fracture of a The present investigation was undertaken as a preliminary study into the influence of strain rate on the forming limit diagram for low carbon steel.For a variation in strain rate from 10 3 s 1 to 70 s 1 experiments have shown that,in the positive quadrant of the forming limit diagram,the position of the forming limit curve is