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Microstructure and forming mechanism of metals subjected to ultrasonic vibration plastic forming: A mini review
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作者 Qinghe Cui Xuefeng Liu +4 位作者 Wenjing Wang Shaojie Tian Vasili Rubanik Vasili Rubanik Jr. Dzmitry Bahrets 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第6期1322-1332,共11页
Compared with traditional plastic forming,ultrasonic vibration plastic forming has the advantages of reducing the forming force and improving the surface quality of the workpiece.This technology has a very broad appli... Compared with traditional plastic forming,ultrasonic vibration plastic forming has the advantages of reducing the forming force and improving the surface quality of the workpiece.This technology has a very broad application prospect in industrial manufactur-ing.Researchers have conducted extensive research on the ultrasonic vibration plastic forming of metals and laid a deep foundation for the development of this field.In this review,metals were classified according to their crystal structures.The effects of ultrasonic vibration on the microstructure of face-centered cubic,body-centered cubic,and hexagonal close-packed metals during plastic forming and the mech-anism underlying ultrasonic vibration forming were reviewed.The main challenges and future research direction of the ultrasonic vibra-tion plastic forming of metals were also discussed. 展开更多
关键词 ultrasonic vibration plastic forming crystal structure MICROSTRUCTURE forming mechanism
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Advance and trend of friction study in plastic forming 被引量:9
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作者 王丹 杨合 李恒 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第5期1263-1272,共10页
Friction is a critical issue in plastic forming which influences forming force, metal flow, forming quality and service life of die. Since friction is a highly nonlinear physical phenomenon which is interactively affe... Friction is a critical issue in plastic forming which influences forming force, metal flow, forming quality and service life of die. Since friction is a highly nonlinear physical phenomenon which is interactively affected by so many factors, great efforts have been made to study the friction mechanism and controlling. The research progress of friction issues in plastic forming was summarized and discussed from four aspects: testing, characterizing, modeling and optimization/controlling. Considering urgent demands for green, efficient and precise forming of high-performance, lightweight and complex components in high-tech industries such as aerospace and automotive, the trends and challenges of friction study in plastic forming were proposed. 展开更多
关键词 plastic forming friction model LUBRICANT friction coefficient
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Plastic forming simulations of cold isostatic pressing of selective laser sintered components 被引量:1
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作者 杜艳迎 史玉升 魏青松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第5期1118-1122,共5页
A combined method of selective laser sintering (SLS) and cold isostatic pressing (CIP) was applied to manufacturing metal parts rapidly. Finite element method was used to predict final dimensions and decrease cost... A combined method of selective laser sintering (SLS) and cold isostatic pressing (CIP) was applied to manufacturing metal parts rapidly. Finite element method was used to predict final dimensions and decrease cost. The simulations of CIP of selective laser sintered parts were carried out by Drucker-Prager-Cap constitutive model with ABAQUS computer program. The property of metal powder was measured by CIP experiments. The results show the rubber bag and the friction coefficient have little influence on results of simulations. The parts only have uniform shrinkage and have no obvious distortion in shape. The results of simulations show a good agreement with the experimental results and the calculated results, indicating that the Drucker-Prager-Cap model is an effective model to simulate CIP process. The simulations could give a useful direction to forming process of the CIP of selective laser sintered components. K 展开更多
关键词 cold isostatic pressing stainless steel plastic forming SIMULATION
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STUDY ON SYNCHRONIZER HUB PLASTIC FORMING 被引量:1
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作者 B. H. Zhang and Z. M. Zhang North China Institute of Technology, Taiyuan 030051, China Mancuscript received 30 July 1999 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第2期446-450,共5页
Metal flowing has been numerically simulated for synchronizer hub at different forming conditions. The influences of billet shape, frictional factor,deformation degree and radius of rounded corner on form- ing for be... Metal flowing has been numerically simulated for synchronizer hub at different forming conditions. The influences of billet shape, frictional factor,deformation degree and radius of rounded corner on form- ing for been studied and the processing parameters have been optimized. On the basis, a new technol- ogy of refilling multiplicity forming has been put forward and workpiece that meets the requirement of synchronizer hub has been manufactured. 展开更多
关键词 synchronizer hub plastic forming numerical simulation
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Simulation of bulk metal forming processes using one-step finite element approach based on deformation theory of plasticity 被引量:2
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作者 王鹏 董湘怀 傅立军 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第2期276-282,共7页
The bulk metal forming processes were simulated by using a one-step finite element(FE)approach based on deformation theory of plasticity,which enables rapid prediction of final workpiece configurations and stress/stra... The bulk metal forming processes were simulated by using a one-step finite element(FE)approach based on deformation theory of plasticity,which enables rapid prediction of final workpiece configurations and stress/strain distributions.This approach was implemented to minimize the approximated plastic potential energy derived from the total plastic work and the equivalent external work in static equilibrium,for incompressibly rigid-plastic materials,by FE calculation based on the extremum work principle.The one-step forward simulations of compression and rolling processes were presented as examples,and the results were compared with those obtained by classical incremental FE simulation to verify the feasibility and validity of the proposed method. 展开更多
关键词 bulk metal forming plastic deformation theory finite element method one-step forward simulation rigid-plastic materials
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Research on Extrude-bulge Forming of Tee Tubes with Plastic Medium
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作者 王成录 吕炎 张毅 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1997年第4期83-85,共3页
This paper presents an experimental research on extrude-bulge forming of tee tubes with plastic medium,an universal device especially designed for this forming process and some parameters having effects on the forming... This paper presents an experimental research on extrude-bulge forming of tee tubes with plastic medium,an universal device especially designed for this forming process and some parameters having effects on the forming process.Comparison of results of the theoretical analysis with experimental results shows a very good agreement between them. 展开更多
关键词 Extrude-bulge forming TEE TUBES plastic MEDIUM
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Model-element Analytic Method for Plastic Forming of Material
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作者 王华昌 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2003年第1期44-46,共3页
MEM(model element method) is proposed to resolve the present difficulties and problems in CAE about plastic forming of material.There are four advantages when MEM is integrated with FEM(finite element method) and UBM(... MEM(model element method) is proposed to resolve the present difficulties and problems in CAE about plastic forming of material.There are four advantages when MEM is integrated with FEM(finite element method) and UBM(upper boundary element method).First,it can make full use of their own advantages and overcome their own disadvantages;second,it can analyse material plastic fluid expediently;third,it can optimize design;finally,it can improve technological content and application effect of CAE software.Based on introducing the principle of MEM briefly,features and applications of MEM are pointed out.In conclusion,a new analysis method for plastic forming comes forth. 展开更多
关键词 model element analytic method plastic forming plastic theory
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Novel AC Servo Rotating and Linear Composite Driving Device for Plastic Forming Equipment
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作者 Jin-Tao Liang Sheng-Dun Zhao +1 位作者 Yong-Yi Li Mu-Zhi Zhu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第4期843-853,共11页
The existing plastic forming equipment are mostly driven by traditional AC motors with long trans- mission chains, low efficiency, large size, low precision and poor dynamic response are the common disadvantages. In o... The existing plastic forming equipment are mostly driven by traditional AC motors with long trans- mission chains, low efficiency, large size, low precision and poor dynamic response are the common disadvantages. In order to realize high performance forming processes, the driving device should be improved, especially for com- plicated processing motions. Based on electric servo direct drive technology, a novel AC servo rotating and linear composite driving device is proposed, which features implementing both spindle rotation and feed motion with- out transmission, so that compact structure and precise control can be achieved. Flux switching topology is employed in the rotating drive component for strong robustness, and fractional slot is employed in the linear direct drive component for large force capability. Then the mechanical structure for compositing rotation and linear motion is designed. A device prototype is manufactured, machining of each component and the whole assembly are presented respectively. Commercial servo amplifiers are utilized to construct the control system of the proposed device. To validate the effectiveness of the proposed composite driving device, experimental study on thedynamic test benches are conducted. The results indicate that the output torque can attain to 420 N-m and the dynamic tracking errors are less than about 0.3 rad in the rotating drive, the dynamic tracking errors are less than about 1.6 mm in the linear feed. The proposed research provides a method to construct high efficiency and accu- racy direct driving device in plastic forming equipment. 展开更多
关键词 plastic forming Direct drive - Permanentmagnet motor Linear feeding Servo control
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Creating Technology and Numerical Analysis of Warm Plastic Forming for Non-symmetrical Axostyle
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作者 徐新成 沈永刚 《Journal of Donghua University(English Edition)》 EI CAS 2010年第4期584-588,共5页
A creating technology of the part forming was discussed and finite volume method(FVM)was used to simulate the forming process of the non-symmetrical axostyle spring core-bar.The results show that the no-even radial fl... A creating technology of the part forming was discussed and finite volume method(FVM)was used to simulate the forming process of the non-symmetrical axostyle spring core-bar.The results show that the no-even radial flange on the top part of the eccentric peachy surface can remarkably block the metal flow and the eccentric peachy can be filled contentedly.Increasing the radius of punch near the inner pocket,the head bulge also can be filled contentedly.The temperature distribution in the part and the forming force,which helps to decide the forming temperature and to select the equipment,was also analyzed.The comparison between the simulation and the experiment result shows that they are accordant. 展开更多
关键词 warm plastic forming finite volume method(FVM) non-symmetrical axostyle
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Humanoid Based Intelligence Control Strategy of Plastic Cement Die Press Work-Piece Forming Process for Polymer Plastics
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作者 Dekuan Liu Shuang Jin Hu Xu 《Journal of Materials Science and Chemical Engineering》 2016年第6期9-16,共8页
The plastic cement belongs to a sort of polymer material, the chemical composition is very complex, and the plastic cement work-piece is generally manufactured by die press forming. Aimed at being difficult to control... The plastic cement belongs to a sort of polymer material, the chemical composition is very complex, and the plastic cement work-piece is generally manufactured by die press forming. Aimed at being difficult to control in parameters of forming process, the paper explored the humanoid based intelligence control strategy. In the paper, it made the anatomy in control puzzle resulted in uncertainty such as chemical component of plastic cement etc., summarized up the characteristic of cybernetics in forming process, researched on the humanoid based intelligence control strategy, and constructed the control algorithm of forming process in plastic cement work-piece. Taking the process experiment of temperature and pressure control as an example, it validated the good dynamic and static control quality through simulation of control algorithm constructed in this paper. The experimental results show that the control algorithm explored in this paper is reasonably available. 展开更多
关键词 plastic Cement Polymer plastics Die Press Work-Piece forming Process Humanoid Based Intelligence Control
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Numerical simulation of ductile fracture behavior for aluminum alloy sheet under cyclic plastic deformation 被引量:3
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作者 胡星 赵亦希 +1 位作者 李淑慧 林忠钦 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第7期1595-1601,共7页
A numerical analysis of mechanical behavior of aluminum alloy sheet under cyclic plastic deformation was investigated.Forming limit at fracture was derived from Cockcroft-Latham ductile damage criterion.The strain pat... A numerical analysis of mechanical behavior of aluminum alloy sheet under cyclic plastic deformation was investigated.Forming limit at fracture was derived from Cockcroft-Latham ductile damage criterion.The strain path of bending center of incremental roller hemming could be accepted as a kind of plane strain bending deformation process.Incremental rope roller hemming could be used to alleviate ductile fracture behavior by changing the stress state of the hemming-effected area.SEM observation on the fracture surface indicates that cyclic plastic deformation affects ductile fracture mechanism. 展开更多
关键词 aluminum alloy ductile damage incremental forming cyclic plastic deformation
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Medium-Mn steels for hot forming application in the automotive industry 被引量:8
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作者 Shuo-shuo Li Hai-wen Luo 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2021年第5期741-753,共13页
Advanced high-strength steels have been widely used to improve the crashworthiness and lightweight of vehicles.Different from the popular cold stamping,hot forming of boron-alloyed manganese steels,such as 22MnB5,coul... Advanced high-strength steels have been widely used to improve the crashworthiness and lightweight of vehicles.Different from the popular cold stamping,hot forming of boron-alloyed manganese steels,such as 22MnB5,could produce ultra-high-strength steel parts without springback and with accurate control of dimensions.Moreover,hot-formed medium-Mn steels could have many advantages,including better mechanical properties and lower production cost,over hot-formed 22MnB5.This paper reviews the hot forming process in the automotive industry,hot-formed steel grades,and medium-Mn steel grades and their application in hot forming in depth.In particular,the adaptabilities of medium-Mn steels and the presently popular 22MnB5 into hot forming were compared thoroughly.Future research should focus on the technological issues encountered in hot forming of medium-Mn steels to promote their commercialization. 展开更多
关键词 medium-Mn transformation-induced plasticity steel hot forming mechanical properties retained austenite BAKING
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Theory and Method of Optimum Path Forming for Sheet Metal 被引量:2
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作者 蔡中义 李明哲 冯肇华 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2001年第2期118-122,共5页
Ideal forming results will be achieved if the sheet metal is formed along an optimum forming path. Such a path can be realized by multi-point forming technique. On the basis of the theory of the ideal forming path (or... Ideal forming results will be achieved if the sheet metal is formed along an optimum forming path. Such a path can be realized by multi-point forming technique. On the basis of the theory of the ideal forming path (or minimum plastic work path), the concept of an optimum forming path is proposed in this paper. The forming path can be described by the initial configuration, objective configuration and a series of intermediate configurations. According to the deformation theory and constitutive equation in ideal path forming, a finite element method to calculate the initial configuration is set up. The functional to determinate intermediate configurations is introduced and the numerical method to solve the configuration is presented. Based on the method presented in the paper, multi-step multi-point forming tests for sheet metal are designed. The test results demonstrate that when the sheet is deformed along an approximate optimum forming path, the maximum deformation curvature for the sphere objective shape and saddle objective shape are 11%∼40% and 15%∼50% greater than those of a sheet deformed along a common path respectively. 展开更多
关键词 Finite element method Metal forming Numerical methods plastic deformation
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Zr-Co(Cu)-Al bulk metallic glasses with optimal glass-forming ability and their compressive properties 被引量:3
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作者 Masoud MOHAMMADI RAHVARD Morteza TAMIZIFAR Seyed Mohammad Ali BOUTORABI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第8期1543-1552,共10页
The formation of bulk metallic glasses(BMGs) in the ternary Zr(56) Co(28-x)Al(16) and quaternary Zr(56) Co(28-x)CuxAl16(x=2, 4, 5, 6, 7, mole fraction, %) glassy alloys was investigated via the copper mo... The formation of bulk metallic glasses(BMGs) in the ternary Zr(56) Co(28-x)Al(16) and quaternary Zr(56) Co(28-x)CuxAl16(x=2, 4, 5, 6, 7, mole fraction, %) glassy alloys was investigated via the copper mold suction casting method. The main purpose of this work was to locate the optimal BMG-forming composition for the quaternary Zr Co(Cu)Al alloys and to improve the plasticity of the parent alloy. The X-ray diffractometry(XRD), transmission electron microscopy(TEM) and differential scanning calorimetry(DSC) were used to investigate the glassy alloys structure and their glass forming ability(GFA). In addition, the compression test, microhardness, nano-indentation and scanning electron microscopy(SEM) were utilized to discuss the possible mechanisms involved in the enhanced plasticity achievement. The highest GFA among Cu-containing alloys was found for the Zr(56) Co(22) Cu6 Al(16) alloy, which was similar to that of the base alloy. Furthermore, the plasticity of the base alloy increased significantly from 3.3% to 6% for the Zr(56) Co(22) Cu)6 Al(16) BMG. The variations in the plasticity and GFA of the alloys were discussed by considering the positive heat of mixing within Cu and Co elements. 展开更多
关键词 bulk metallic glass zirconium base alloy glass forming ability plasticITY
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Numerical study on forming complex fitting body on end of integrated stainless steel pipe without welds 被引量:2
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作者 张大伟 赵升吨 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第2期269-276,共8页
It is necessary to use the integrated stainless steel pipe having two fitting bodies without welds while train travelling at high speed. In order to form this type of integrated stainless steel pipe, the method of pre... It is necessary to use the integrated stainless steel pipe having two fitting bodies without welds while train travelling at high speed. In order to form this type of integrated stainless steel pipe, the method of preforming combined finish forming process is developed. The preforming process is characterized by flaring combined upsetting for left fitting body which is like a flange, and is characterized by tube axial compressive process under die constraint for right fitting body which is like a double-wall pipe. The finite element simulations of the processes are carried out by software package DEFORM, and the results indicate that: 1) left or right fitting body can be formed by a two-step forming process without folding and under-filling defects; 2) by using two-step forming, strain and stress in left fitting body are larger than those in right fitting body, and deformation in right fitting body is more homogenous than the deformation in left fitting body; 3) two or more preforming steps may be needed for left fitting body considering the distributions of strain and stress. 展开更多
关键词 plastic forming hot forming flange joint integrated steel pipe finite element analysis
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Water-Jet Cavitation Shock Bulging as Novel Microforming Technique 被引量:2
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作者 Fuzhu Li Haiyang Fan +5 位作者 Yuqin Guo Zhipeng Chen Xu Wang Ruitao Li Hong Liu Yun Wang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2021年第1期199-209,共11页
With the continuous expansion of the application range of microelectromechanical systems,microdevice forming technology has achieved remarkable results.However,it is challenging to develop new microforming processes t... With the continuous expansion of the application range of microelectromechanical systems,microdevice forming technology has achieved remarkable results.However,it is challenging to develop new microforming processes that are low cost,environmentally friendly,and highly flexible;the high-energy shock wave in a cavitation bubble's collapse process is used as the loading force.Herein,a new process for the microbulging of the water-jet cavitation is proposed.A series of experiments involving the water-jet cavitation shock microbulging process for TA2 titanium foil is performed on an experimental system.The microforming feasibility of the water-jet cavitation is investigated by characterizing the shape of the formed part.Subsequently,the effects of the main parameters of the water-jet cavitation on the bulging profile,forming depth,surface roughness,and bulging thickness distribution of TA2 titanium foil are revealed.The results show that the plastic deformation increases nonlinearly with the incident pressure.When the incident pressure is 20 MPa,the maximum deformation exceeds 240 pm,and the thickness thinning ratio changes within 10%.The microbulging feasibility of water-jet cavitation is verified by this phenomenon. 展开更多
关键词 Water-jet cavitation Microbulging TA2 titanium foil Shock forming plastic deformation
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Recent research and development on forming for large magnesium alloy components with high mechanical properties 被引量:2
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作者 Zhimin Zhang Jianmin Yu +3 位作者 Yong Xue Beibei Dong Xi Zhao Qiang Wang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2023年第11期4054-4081,共28页
The lightweight of high-end equipment relies on high mechanical properties magnesium(Mg) alloy structural components, because it is the best way to improve equipment service performance and reduce energy consumption. ... The lightweight of high-end equipment relies on high mechanical properties magnesium(Mg) alloy structural components, because it is the best way to improve equipment service performance and reduce energy consumption. This article summarizes the current progress and characteristics of large-scale high-performance Mg alloy components by analyzing the strengthening-toughening mechanisms, characteristics of plastic forming, and the preparation of large high mechanical properties forging blanks. Due to the lack of breakthroughs in the key technologies for forming large-scale Mg alloy components, their uniformity of mechanical properties and consistency are poor, the forming accuracy of components is low, and the production cost is high, which limit their engineering application and restrict the lightweight level of high-end equipment. In view of the above problems, the forming trends and research directions of large-scale and high mechanical properties Mg alloy components are proposed in this paper. It can provide help for the breakthrough of the key technology of large-scale Mg alloy components with high mechanical properties and expand the application of Mg alloy in high-end products. 展开更多
关键词 Mg alloys Wrought Mg alloys components plastic forming Large-scale Mg alloys components High mechanical properties
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FEM equivalent model for press bend forming of aircraft integral panel 被引量:12
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作者 阎昱 万敏 王海波 《中国有色金属学会会刊:英文版》 EI CSCD 2009年第2期414-421,共8页
An original plastic equivalent model was proposed to solve the problem of excessive FEM simulation time when designing the press bend forming path and optimizing the process parameters of press bend forming of the int... An original plastic equivalent model was proposed to solve the problem of excessive FEM simulation time when designing the press bend forming path and optimizing the process parameters of press bend forming of the integrally stiffened aircraft panels. Based on the in-depth analysis of the mechanics of the bending and springback of the detailed model and the equivalent model of the integral panels,the plastic equivalent model of the virtual material with special initial yield stress and hardening coefficients was constructed. FEM results indicate that the objective of getting the similar contour with the same press bend forming path is achieved with the error less than 6%,and the efficiency of FEM simulation is improved by more than 80%. The plastic equivalent model is valuable and essential for the further research on the press bend forming process of large scale complicated integral panels. 展开更多
关键词 弯曲成形 有限元模型 飞机 有限元模拟 等效模型 组成 优化工艺参数 成形路径
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Non-Local Analysis of Forming Limits of Ductile Material Considering Void Growth
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作者 Youngsuk Kim 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2003年第4期294-299,共6页
The current study performed a finite element analysis of the strain localization behavior of a voided ductile material using a non-local plasticity formulation in which the yield strength depends on both an equivalent... The current study performed a finite element analysis of the strain localization behavior of a voided ductile material using a non-local plasticity formulation in which the yield strength depends on both an equivalent plastic strain measurement (hardening parameter) and Laplacian equivalent. The introduction of gradient terms to the yield function was found to play an important role in simulating the strain localization behavior of the voided ductile material. The effect of the mesh size and characteristic length on the strain localization were also investigated. An FEM simulation based on the proposed non-local plasticity revealed that the load-strain curves of the voided ductile material subjected to plane strain tension converged to one curve, regardless of the mesh size. In addition, the results using non-local plasticity also exhibited that the dependence of the deformation behavior of the material on the mesh size was much less sensitive than that with classical local plasticity and could be successfully eliminated through the introduction of a large value for the characteristic length. 展开更多
关键词 NON-LOCAL Characteristic length Vbid Damage growth Gradient-dependent plasticity forming limit Strain localization
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PREDICTION OF PATH-DEPENDENT FAILURE IN ALUMINUM SHEET METALS UNDER FORMING OPERATIONS
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作者 H.-M. Huang, J. Pan and S. C. Tang 1) Mechanical Engineering and Applied Mechanics, The University of Michigan Ann Arbor, MI 48109, USA 2) Ford Research Laboratory, Ford Motor Company Dearborn, MI 48121, USA 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第2期600-605,共6页
An approximate macroscopic yield criterion for anisotropic porous sheet metals is adopted in a failure prediction methodology that can be used to investigate the failure of sheet metals under forming operations. This... An approximate macroscopic yield criterion for anisotropic porous sheet metals is adopted in a failure prediction methodology that can be used to investigate the failure of sheet metals under forming operations. This failure prediction methodology is developed based on the Marciniak-Kuczynski approach by assuming a slightly higher void volume fraction inside randomly oriented imperfecte analysis. Here, a nonproportional deformation history including relative rotation of principal stretch directions is identified in a selected critical element of an aluminum sheet from a FEM fender forming simulation. Based on the failure prediction methodology, the failure of the critical sheet element is investigated under the non-proportional deformation history. The results show that thiven non-proportional deformation history. 展开更多
关键词 sheet metal forming aluminum alloy failure prediction plastic flow localization
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