期刊文献+
共找到1,089篇文章
< 1 2 55 >
每页显示 20 50 100
Flexible-die forming process with solid granule medium on sheet metal 被引量:13
1
作者 董国疆 赵长财 曹秒艳 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第9期2666-2677,共12页
Certain non-metallic granules (NMG) were selected as the research object. It was proposed to conduct the volume compression experiments as well as those on the NMG physical properties at high stress levels. Then, no... Certain non-metallic granules (NMG) were selected as the research object. It was proposed to conduct the volume compression experiments as well as those on the NMG physical properties at high stress levels. Then, not only the volume compression ratio curve but also the extended Drucker-Prager linear model were obtained. In addition, through the friction strength tests, parameters of the Mohr-Coulomb model were gained, which proved in basic agreement with those of the extended Drucker-Prager linear model. Additionally, curves of the friction coefficients between the NMG and the sheet metal trader different pressures were also obtained. Based on the material performance experiments, numerical analysis in respect of flexible-die forming process with solid granule medium (SGM) was conducted. The die and device for experiments of solid granule medium forming (SGMF) on sheet metal were designed and manufactured. Typical parabolic parts were successfully trial-produced. The tests and simulation results show that the sheet formability is significantly improved for the extraordinary friction performance during interaction between the SGM and the sheet metal surface. The process control and die structure are simple, and the shaped work-pieces enjoy many advantages, such as satisfactory surface quality and favorable die fitability, which offers a brand-new method and means for processing and preparation of sheet metals. 展开更多
关键词 solid granules medium forming DRAWING sheet metal finite element simulation
下载PDF
Sheet Metal Forming Simulation and Its Application in Stamping Process of Automobile Panels 被引量:4
2
作者 张扬 张连洪 +1 位作者 李双义 王洪志 《Transactions of Tianjin University》 EI CAS 2002年第4期269-272,共4页
The paper starts with a brief overview to the necessity of sheet metal forming simulation and the complexity of automobile panel forming, then leads to finite element analysis (FEA) which is a powerful simulation too... The paper starts with a brief overview to the necessity of sheet metal forming simulation and the complexity of automobile panel forming, then leads to finite element analysis (FEA) which is a powerful simulation tool for analyzing complex three-dimensional sheet metal forming problems. The theory and features of the dynamic explicit finite element methods are introduced and the available various commercial finite element method codes used for sheet metal forming simulation in the world are discussed,and the civil and international status quo of automobile panel simulation as well. The front door outer panel of one certain new automobile is regarded as one example that the dynamic explicit FEM code Dynaform is used for the simulation of the front door outer panel forming process. Process defects such as ruptures are predicted. The improving methods can be given according to the simulation results. Foreground of sheet metal forming simulation is outlined. 展开更多
关键词 finite element analysis dynamic explicit methods sheet metal forming finite element method codes automobile panel computer simulation APPLICATION
下载PDF
Multi-Point Forming Technology for Sheet Metal 被引量:10
3
作者 LI Ming-zhe, CAI Zhong-yi, SUI Zhen, YAN Qing-guang (Roll Forging Institute, Jilin University of Technology, Changchun 130025, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期17-,共1页
Multi-point forming (MPF) is an advanced manufacturing technology for three-dimensional sheet metal parts. In this paper, the MPF integrated system is described that can form a variety of part shapes without the need ... Multi-point forming (MPF) is an advanced manufacturing technology for three-dimensional sheet metal parts. In this paper, the MPF integrated system is described that can form a variety of part shapes without the need for solid dies, and given only geometry and material information about the desired part. The central component of this system is a pair of matrices of punches, and the desired discrete die surface is constructed by changing the positions of punches though the CAD and control system. The basic MPF process is introduced and the typical application examples show the applicability of the MPF technology. Wrinkle and dimple are the major forming defects in MPF process, numerical simulation is a feasible way to predict forming defects in MPF. In conventional stamping, the mode to form sheet metal with blankholder is an effective way to suppress wrinkling; the same is true in MPF. A MPF press with flexible blankholder was developed, and the forming results indicated the forming stability of this technique. Based on the flexibility of MPF, varying deformation path MPF and sectional MPF were explored that cannot be realized in conventional stamping. By controlling each punch in real-time, a sheet part can be manufactured along a specific forming path. When the path of deformation in MPF is designed properly, forming defects will be avoided completely and lager deformation is achieved. A work piece can be formed section by section though the sectional MPF, and this technique makes it possible to manufacture large size parts in a small MPF press. Some critical experiments were performed that confirmed the validity of two special MPF techniques. 展开更多
关键词 sheet metal multi-point forming flexible forming forming path WRINKLING forming defects
下载PDF
SIX SIGMA OPTIMIZATION IN SHEET METAL FORMING BASED ON DUAL RESPONSE SURFACE MODEL 被引量:13
4
作者 LI Yuqiang CUI Zhenshan ZHANG Dongjuan RUAN Xueyu CHEN Jun 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第2期251-255,共5页
Iterations in optimization and numerical simulation for the sheet metal forming process may lead to extensive computation. In addition, uncertainties in materials or processing parameters may have great influence on t... Iterations in optimization and numerical simulation for the sheet metal forming process may lead to extensive computation. In addition, uncertainties in materials or processing parameters may have great influence on the design quality. A six sigma optimization method is proposed, by combining the dual response surface method (DRSM) and six sigma philosophy, to save computation cost and improve reliability and robustness of parts. Using this method, statistical technology, including the design of experiment and analysis of variance, approximate model and six sigma philosophy are integrated together to achieve improved quality. Two sheet metal forming processes are provided as examples to illustrate the proposed method. 展开更多
关键词 six sigma optimization sheet metal forming Dual response surface
下载PDF
FAST ACCURATE PREDICTION OF BLANK SHAPE IN SHEET METAL FORMING 被引量:14
5
作者 LiuYuqi LiZhigang YahYakun 《Acta Mechanica Solida Sinica》 SCIE EI 2004年第1期58-64,共7页
By using the Finite Element Inverse Approach based on the Hill quadratic anisotrop-ically yield criterion and the quadrilateral element, a fast analyzing software-FASTAMP for the sheet metal forming is developed. The ... By using the Finite Element Inverse Approach based on the Hill quadratic anisotrop-ically yield criterion and the quadrilateral element, a fast analyzing software-FASTAMP for the sheet metal forming is developed. The blank shapes of three typical stampings are simulated and compared with numerical results given by the AUTOFORM software and experimental results, respectively. The comparison shows that the FASTAMP can predict blank shape and strain distribution of the stamping more precisely and quickly than those given by the traditional methods and the AUTOFORM. 展开更多
关键词 sheet metal forming Finite Element Inverse Approach blank shape FAsTAMP software
下载PDF
Sheet Metal Forming Optimization by Using Surrogate Modeling Techniques 被引量:6
6
作者 WANG Hu YE Fan +1 位作者 CHEN Lei LI Enying 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第1期22-36,共15页
Surrogate assisted optimization has been widely applied in sheet metal forming design due to its efficiency. Therefore, to improve the efficiency of design and reduce the product development cycle, it is important for... Surrogate assisted optimization has been widely applied in sheet metal forming design due to its efficiency. Therefore, to improve the efficiency of design and reduce the product development cycle, it is important for scholars and engineers to have some insight into the performance of each surrogate assisted optimization method and make them more flexible practically. For this purpose, the state-of-the-art surrogate assisted optimizations are investigated. Furthermore, in view of the bottleneck and development of the surrogate assisted optimization and sheet metal forming design, some important issues on the surrogate assisted optimization in support of the sheet metal forming design are analyzed and discussed, involving the description of the sheet metal forming design, off-line and online sampling strategies, space mapping algorithm, high dimensional problems, robust design, some challenges and potential feasible methods. Generally, this paper provides insightful observations into the performance and potential development of these methods in sheet metal forming design. 展开更多
关键词 surrogate OPTIMIZATION sheet metal forming
下载PDF
A Study on Super Speed Forming of Metal Sheet by Laser Shock Waves 被引量:4
7
作者 ZHOU Jian-zhong 1, YANG Ji-chang 1, ZHANG Yong-kang 1, ZHOU Ming 2 (1. School of Mechanical Engineering, Jiangsu University, Zhenjiang, 21 2013 China 2. School of Material Science and Engineering, Jiangsu University, Zhenjiang 21 2000, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期127-128,共2页
Metal sheet plastic deformation or forming is gener at ed through a mechanical pressure or a thermal variation. These pressure variatio ns or thermal variations can be created by a variety of means such as press form ... Metal sheet plastic deformation or forming is gener at ed through a mechanical pressure or a thermal variation. These pressure variatio ns or thermal variations can be created by a variety of means such as press form ing, hydroforming, imploding detonation and so on. According to the magnitude of the strain rates all these forming methods can be divided into quasi-static fo rming and dynamical forming. Up to now there are no reports of forming methods w ith the strain rates above 10 5sec -1, even though the exploding forming. In this article, we work on a dynamic super-speed forming method driven by lase r shock waves and advanced a novel concept of laser shock forming. The initial o bservation of the laser shock forming is done through a bugle testing with speci mens of SUS430 sheet metal, using a neodymium-glass laser of pulse energy 10J~ 3 0J and duration of 20 ns (FWHM). The investigation revealed that the plastic de formation during the laser shock forming is characterized as ultrahigh strain ra te up to 10 7sec -1. We indicate that plastic deformation increases nonlin early when the energy density of the laser varies. By investigating the hardness and residual stress of the surfaces, we conclude that laser shock forming is a combination technique of laser shock strengthening and metal forming for introdu cing a strain harden and a compressive residual stress on the surface of the wor k-piece, and the treated surface by laser shock forming has good properties in fatigue and corrosion resistance. This technique can achieve forming wit h or without mould. 展开更多
关键词 laser shock wave metal sheet forming ultrahigh strain rate residual stresses
下载PDF
DEFORMATION ANALYSIS OF SHEET METAL SINGLE-POINT INCREMENTAL FORMING BY FINITE ELEMENT METHOD SIMULATION 被引量:3
8
作者 MA Linwei MO Jianhua 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第1期31-35,共5页
Single-point incremental forming (SPIF) is an innovational sheet metal forming method without dedicated dies, which belongs to rapid prototyping technology. In generalizing the SPIF of sheet metal, the deformation a... Single-point incremental forming (SPIF) is an innovational sheet metal forming method without dedicated dies, which belongs to rapid prototyping technology. In generalizing the SPIF of sheet metal, the deformation analysis on forming process becomes an important and useful method for the planning of shell products, the choice of material, the design of the forming process and the planning of the forming tool. Using solid brick elements, the finite element method(FEM) model of truncated pyramid was established. Based on the theory of anisotropy and assumed strain formulation, the SPIF processes with different parameters were simulated. The resulted comparison between the simulations and the experiments shows that the FEM model is feasible and effective. Then, according to the simulated forming process, the deformation pattern of SPIF can be summarized as the combination of plane-stretching deformation and bending deformation. And the study about the process parameters' impact on deformation shows that the process parameter of interlayer spacing is a dominant factor on the deformation. Decreasing interlayer spacing, the strain of one step decreases and the formability of blank will be improved. With bigger interlayer spacing, the plastic deformation zone increases and the forming force will be bigger. 展开更多
关键词 sheet metal incremental forming DEFORMATION Finite element method(FEM) Numerical simulation
下载PDF
NC INCREMENTAL SHEET METAL FORMING PROCESS AND VERTICAL WALL SQUARE BOX FORMING 被引量:2
9
作者 ZhouLiuru MoJianhua XiaoXiangzhi 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2004年第3期442-445,共4页
The forming principle and deformation analysis of NC incremental sheet metalforming process as well as the process planning, experiment and key process parameters of verticalwall square box forming are presented. Beca... The forming principle and deformation analysis of NC incremental sheet metalforming process as well as the process planning, experiment and key process parameters of verticalwall square box forming are presented. Because the deformation of sheet metal only occurs around thetool head and the deformed region is subjected to stretch deformation, the deformed region of sheetmetal thins, and surface area increases. Sheet metal forming stepwise is to lead to the whole sheetmetal deformation. The forming half-apex angle 9 and corner radius R are the main processparameters in NC incremental forming of vertical wall square box. According to sine law, a verticalwall square box can't be formed by NC incremental sheet metal forming process in a single process,rather, it must be formed in multi processes. Thus, the parallel line type tool path process methodis presented to form the vertical wall square box, and the experiment and analysis are made toverify it. 展开更多
关键词 sheet metal forming NC incremental forming Dieless forming Vertical wallsquare box forming
下载PDF
STUDY ON THE FINITE ELEMENT NUMERICAL SIMULATION OF SHEET METAL FORMING 被引量:2
10
作者 J.L.Song D.J.Hu +2 位作者 Z.L.Chang T.Y.Li Z.B.Jiang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2004年第3期299-302,共4页
Based on the Finite Element Theory of Rigid Plastic,relevant problems during plas-tic simulation on sheet metal forming were technologically studied and simplified;a simplified model of the blank holder during the dra... Based on the Finite Element Theory of Rigid Plastic,relevant problems during plas-tic simulation on sheet metal forming were technologically studied and simplified;a simplified model of the blank holder during the drawing process was established and the effects of related parameters on the forming processes were also studied.At the same time,a finite--element numerical simulation program SPID was developed.The distribution of strain and relationship of stress--stroke simulated were compared with experimented,the results are well coincided with each other.It is verified that the analytical program is reliable. 展开更多
关键词 sheet metal forming FINITE-ELEMENT numerical simulation
下载PDF
EXPERIMENTAL TESTING OF DRAW-BEAD RESTRAINING FORCE IN SHEET METAL FORMING 被引量:2
11
作者 J.H.Yang J.Chen +1 位作者 D.N.He X.Y.Ruan 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2003年第1期46-50,共5页
Due to complexities of draw-bead restraining force calculated according to theory and depending on sheet metal forming properties experiment testing system, a simplified method to calculate draw-bead restraining force... Due to complexities of draw-bead restraining force calculated according to theory and depending on sheet metal forming properties experiment testing system, a simplified method to calculate draw-bead restraining force is put forward by experimental method in cup-shaped drawing process. The experimental results were compared with numerical results and proved agreement. It shows the method is effective. 展开更多
关键词 sheet metal forming draw-bead restraining force numerical simulation
下载PDF
Experimental Investigation of the Effect of the Material Damage Induced in Sheet Metal Forming Process on the Service Performance of 22MnB5 Steel 被引量:7
12
作者 ZHUANG Weimin XIE Dongxuan CHEN Yanhong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第4期747-755,共9页
The use of ultra-high strength steels through sheet metal forming process offers a practical solution to the lightweight design of vehicles.However,sheet metal forming process not only produces desirable changes in ma... The use of ultra-high strength steels through sheet metal forming process offers a practical solution to the lightweight design of vehicles.However,sheet metal forming process not only produces desirable changes in material properties but also causes material damage that may adversely influence the service performance of the material formed.Thus,an investigation is conducted to experimentally quantify such influence for a commonly used steel(the 22MnB5 steel) based on the hot and cold forming processes.For each process,a number of samples are used to conduct a uniaxial tensile test to simulate the forming process.After that,some of the samples are trimmed into a standard shape and then uniaxially extended until fracture to simulate the service stage.Finally,a microstructure test is conducted to analyze the microdefects of the remaining samples.Based on the results of the first two tests,the effect of material damage on the service performance of 22MnB5 steel is analyzed.It is found that the material damages of both the hot and cold forming processes cause reductions in the service performance,such as the failure strain,the ultimate stress,the capacity of energy absorption and the ratio of residual strain.The reductions are generally lower and non-linear in the former process but higher and linear in the latter process.Additionally,it is found from the microstructure analysis that the difference in the reductions of the service performance of 22MnB5 by the two forming processes is driven by the difference in the micro damage mechanisms of the two processes.The findings of this research provide a useful reference in terms of the selection of sheet metal forming processes and the determination of forming parameters for 22MnB5. 展开更多
关键词 material damage sheet metal forming ultra-high strength steel 22MnB5 steel
下载PDF
QUANTITATIVE PREDICTION FOR SPRINGBACK OF UNLOADING AND TRIMMING IN SHEET METAL STAMPING FORMING 被引量:7
13
作者 LiuYuqi LiuJunhua +1 位作者 HuPing LiYunxing 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第2期190-192,196,共4页
Based on the elastic-plastic large deformation finite element formulation as well as the shell element combined discrete Kirchhoff theoretical plate element (DKT) with membrane square element, deep-drawing bending spr... Based on the elastic-plastic large deformation finite element formulation as well as the shell element combined discrete Kirchhoff theoretical plate element (DKT) with membrane square element, deep-drawing bending springback of typical U-pattern is studied. At the same time the springback values of the drawing of patterns' unloading and trimming about the satellite aerial reflecting surface are predicted and also compared with those of the practical punch. Above two springbacks all obtain satisfactory results, which provide a kind of effective quantitative pre-prediction of springback for the practical engineers. 展开更多
关键词 sheet metal stamping forming Unloading springback Trimming springback Discrete kirchhoff theory(DKT) Finite element method
下载PDF
TOOL PATH GENERATION BASED ON STL FILE FOR SHEET METAL DIELESS FORMING 被引量:1
14
作者 LiuJie MoJianhua 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2004年第2期230-232,共3页
Sheet metal dieless forming is a new metal forming technology. Thistechnology adopts the principle of rapid prototyping technology, so it can form sheet metal partswithout traditional die and moulds. According to the ... Sheet metal dieless forming is a new metal forming technology. Thistechnology adopts the principle of rapid prototyping technology, so it can form sheet metal partswithout traditional die and moulds. According to the characteristic of sheet metal dieless formingtechnology a new way of tool path generation based on the STL file for sheet metal dieless formingis proposed. 展开更多
关键词 sheet metal Ddieless forming Tool path sTL file
下载PDF
The Effect of Variable Blank-Holder Forces on the Formability of Aluminum Alloy Sheets during Sheet Metal Forming 被引量:1
15
作者 Sun Chengzhi Chen Guanlong Lin Zhongqin 《上海交通大学学报》 EI CAS CSCD 北大核心 2004年第z2期54-60,共7页
In this paper, the effect of variable Blank-holder forces (VBHF) on the strain path during sheet metal forming has been investigated by numerical simulation and experiments. The formability of select aluminum alloy sh... In this paper, the effect of variable Blank-holder forces (VBHF) on the strain path during sheet metal forming has been investigated by numerical simulation and experiments. The formability of select aluminum alloy sheet was evaluated by theory prediction of forming limit curve based on the M-K method. The effect of different VBHF on the formability was presented. In order to verify the predictions of strain path, experiments are being carried out using a recently-built multi-points variable blank-holder forces hydraulic press. The results show that large side BHF with small comer BHF during rectangular box deep drawing can improve the formability of the selected aluminum alloy 展开更多
关键词 sheet metal forming VARIABLE blank-holder force strain path forming LIMIT CURVE
下载PDF
IoT-enabled energy efficiency monitoring and analysis method for energy saving in sheet metal forming workshop 被引量:2
16
作者 GAN Lei HUANG Hai-hong +2 位作者 LI Lei XIONG Wei LIU Zhi-feng 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第1期239-258,共20页
Sheet metal forming,as a typical energy-intensive process,consumes massive energy.Due to the significant difference between sheet metal forming and machining,manufacturers still lack an effective method to monitor and... Sheet metal forming,as a typical energy-intensive process,consumes massive energy.Due to the significant difference between sheet metal forming and machining,manufacturers still lack an effective method to monitor and analyze the energy efficiency in the sheet metal forming workshop.To this end,an energy efficiency monitoring and analysis(EEMA)method,which is supported by Internet of Things(IoT),is proposed.The characteristics in a forming workshop are first analyzed,and then the architecture of the method is expatiated-detailedly.Energy efficiency indicators at machine level,process level,and workshop level are defined,respectively.Finally,a sheet metal forming workshop for the deformation of panels of forklift was investigated to validate the effectiveness and benefits of the proposed method.With the application of the IoT-enabled method,various energy-saving decisions can be made by the management of the enterprises for energy efficiency improvement and energy consumption reduction(EEIECR)in the sheet metal forming workshop. 展开更多
关键词 sheet metal forming workshop energy efficiency monitoring Internet of Things(IoT)
下载PDF
Surface topography evolvement of galvanized steels in sheet metal forming 被引量:3
17
作者 侯英岢 于忠奇 +2 位作者 张卫刚 蒋浩民 林忠钦 《中国有色金属学会会刊:英文版》 EI CSCD 2009年第2期305-310,共6页
U-channel forming tests were performed to investigate the surface topography evolvement of hot-dip galvanized(GI) and galvannealed(GA) steels and the effects of die hardness on sheet metal forming(SMF). Experimental r... U-channel forming tests were performed to investigate the surface topography evolvement of hot-dip galvanized(GI) and galvannealed(GA) steels and the effects of die hardness on sheet metal forming(SMF). Experimental results indicate that the surface roughness values of the two galvanized steels increase with the number of forming,i.e.,the surface topographies of galvanized steels are roughened in SMF. Moreover,GI steel has a better ability of damage-resistance than GA steel. The mechanisms of topography evolvement are different in the forming of GI and GA steels. Scratch is the main form of surface damage in the forming of GI steels. The severity of scratch can be decreased by increasing die hardness. GA steel results in exfoliating of the coating firstly and then severe scratching. The surface topography of galvannealed steels can be improved by increasing die hardness. However,the hardness should not be too high. 展开更多
关键词 表面粗糙度值 金属板料成形 镀锌钢材 形貌演变 合金化热镀锌 表面地形 单模光纤 形貌演化
下载PDF
Plasma-Jet Forming of Sheet Metal Shapes 被引量:1
18
作者 A.T.Male Y.W.Chen +1 位作者 P.J.Li C.Pan and Y.M.Zhang Center for Robottes and Manufacturing Systems, University of Kentucky, Lexington, KY 40506-0108, USA 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第1期115-116,共2页
Plasma-jet forming is a newly proposed flexible sheet metal forming process. A non-transferred arc plasma torch is used as a controllable heat source to produce internal stress in sheet metals, causing plastic deforma... Plasma-jet forming is a newly proposed flexible sheet metal forming process. A non-transferred arc plasma torch is used as a controllable heat source to produce internal stress in sheet metals, causing plastic deformation without the necessity of hard tooling. This method has potential for rapid prototyping of sheet metal parts by reducing development costs and lead times. A robotic system has been used to perform simple linear bends in several different alloys. In order to develop a controllable process and to improve the forming accuracy, the effects of various process parameters on the obtained shape changes and on the resulting structure and properties have been studied. The overall goal is to understand the roles of the forming parameters and their inter-relationship in optimizing the forming procedure-a high forming speed without damage to the material structure or properties. 展开更多
关键词 CIRP Plasma-Jet forming of sheet metal shapes CHEN
下载PDF
Numerical simulation of temperature field in plasma-arc flexible forming of laminated-composite metal sheets 被引量:3
19
作者 宋文庆 徐文骥 +2 位作者 王续跃 孟建兵 李洪友 《中国有色金属学会会刊:英文版》 CSCD 2009年第B09期61-67,共7页
Flexible forming of laminated-composite metal sheets (LCMS) using plasma arc is a latest technique, which produces LCMS components by thermal stress without mould and external force. Considering that the controllable ... Flexible forming of laminated-composite metal sheets (LCMS) using plasma arc is a latest technique, which produces LCMS components by thermal stress without mould and external force. Considering that the controllable temperature field is the key during the forming process, a three-layer FEM model, based on the characteristics along LCMS thickness direction, was developed to study the variation rules of temperature field, which was verified robustness by experimental validation. Besides, the influences of process parameters such as plasma arc power, scanning speed and plasma arc diameter on LCMS temperature field were performed. The comparisons of LCMS with single layer metal sheet (SLMS) show the temperature difference of LCMS along thickness direction is smaller than that of SLMS, but the heat-affected zone of LCMS along X axis is wider than that of SLMS under the same process parameters. 展开更多
关键词 电弧温度场 复合金属 弹性夹层 数值模拟 内容管理系统 板成形 血浆 等离子弧
下载PDF
PREDICTION OF PATH-DEPENDENT FAILURE IN ALUMINUM SHEET METALS UNDER FORMING OPERATIONS
20
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
下载PDF
上一页 1 2 55 下一页 到第
使用帮助 返回顶部