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Experimental research on ductile fracture criterion in metal forming
Song YU, Weiming FENG
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 308-311 doi: 10.1007/s11465-011-0233-z
Ductile fracture criterion is key limitation parameter in material forming. Accuracy predicting surface and internal failure in plastic deformation process affects on the technology design of workpiece and die greatly. Tension, compression, torsion and shearing test on 45# steel are utilized for providing the experimental values of the critical values at fracture, and 11 widely used ductile fracture criterion are selected to simulate the physical experiments and their relative accuracy for predicting and quantifying fracture initiation sites are investigated. The comparing results show that metal forming process under high triaxiality can be estimated successively using both Normalized Cockcroft-latham and the Brozzo ductile fracture criteria, but the Ayada and general Rice-Tracey model work very well for the low triaxiality cases.
关键词: ductile fracture criteria metal forming process material experiment stress triaxiality
Finite element simulations of sheet metal forming under complex strain paths
CHEN Wei, YANG Jichang, WU Xiaofeng, LU Dun, GUO Weigang
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 399-403 doi: 10.1007/s11465-007-0069-8
Properties and effect of forming sewage sludge into lightweight ceramics
Min YUE, Qinyan YUE, Yuanfeng QI, Baoyu GAO, Hui YU
《环境科学与工程前沿(英文)》 2012年 第6卷 第1期 页码 117-124 doi: 10.1007/s11783-010-0220-3
Diffusion process in enzyme–metal hybrid catalysts
《化学科学与工程前沿(英文)》 2022年 第16卷 第6期 页码 921-929 doi: 10.1007/s11705-022-2144-4
关键词: enzyme–metal hybrid catalyst internal diffusion proximity effect kinetic model
蔡安辉,潘冶,孙国雄,阮许平
《中国工程科学》 2004年 第6卷 第1期 页码 68-73
快速判定大块金属玻璃(BMG)的玻璃形成能力(GFA)是开发新型BMG的关键。基于加和性原则,用动力学理论解释了约化玻璃转变温度Trg作为合金玻璃形成能力的可行性和局限性,为制备非晶合金提供了理论依据,合金能形成BMG的最低Trg为0.4066,同时找到了玻璃形成能力最佳的两个理论约化玻璃温度,即 Trg=1和Trg=0;提出了判定GFA大小及其稳定性的两个新的参量摩尔熔化热ΔHmg和稳定性CPS,并用它计算了BMG合金系的GFA大小及其稳定性,BMG的GFA大小顺序与井上明久(Inoue)的排列顺序吻合较好。同时,按照BMG合金Zmax和Rc的平均变化对其进行了检验,两者均吻合很好。ΔHmg的大小是一种快速评价BMG的GFA能力及其稳定性的好方法。
Digital high-efficiency print forming method and device for multi-material casting molds
Zhongde SHAN, Zhi GUO, Dong DU, Feng LIU, Wenjiang LI
《机械工程前沿(英文)》 2020年 第15卷 第2期 页码 328-337 doi: 10.1007/s11465-019-0574-6
关键词: multi-material casting mold 3D printing efficient print forming method
Omotoyosi H. FAMODIMU, Mark STANFORD, Chike F. ODUOZA, Lijuan ZHANG
《机械工程前沿(英文)》 2018年 第13卷 第4期 页码 520-527 doi: 10.1007/s11465-018-0521-y
Laser melting of aluminium alloy—AlSi10Mg has increasingly been used to create specialised products in various industrial applications, however, research on utilising laser melting of aluminium matrix composites in replacing specialised parts have been slow on the uptake. This has been attributed to the complexity of the laser melting process, metal/ceramic feedstock for the process and the reaction of the feedstock material to the laser. Thus, an understanding of the process, material microstructure and mechanical properties is important for its adoption as a manufacturing route of aluminium metal matrix composites. The effects of several parameters of the laser melting process on the mechanical blended composite were thus investigated in this research. This included single track formations of the matrix alloy and the composite alloyed with 5% and 10% respectively for their reaction to laser melting and the fabrication of density blocks to investigate the relative density and porosity over different scan speeds. The results from these experiments were utilised in determining a process window in fabricating near-fully dense parts.
关键词: selective laser melting additive manufacturing mechanical alloying powder metallurgy aluminium metal matrix composite
Formation mechanism and modeling of surface waviness in incremental sheet forming
《机械工程前沿(英文)》 2022年 第17卷 第2期 doi: 10.1007/s11465-022-0679-1
关键词: surface waviness incremental sheet forming numerical simulation formation mechanism deformation history
Interfacial heat transfer coefficient between metal and die during high pressure die casting process
GUO Zhipeng, XIONG Shoumei, CHO SangHyun, CHOI JeongKil
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 283-287 doi: 10.1007/s11465-007-0049-z
FEM-based strain analysis study for multilayer sheet forming process
Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 373-379 doi: 10.1007/s11465-015-0371-9
Fiber metal laminates have many advantages over traditional laminates (e.g., any type of fiber and resin material can be placed anywhere between the metallic layers without risk of failure of the composite fabric sheets). Furthermore, the process requirements to strictly control the temperature and punch force in fiber metal laminates are also less stringent than those in traditional laminates. To further explore the novel method, this study conducts a finite element method-based (FEM-based) strain analysis on multilayer blanks by using the 3A method. Different forming modes such as wrinkling and fracture are discussed by using experimental and numerical studies. Hydroforming is used for multilayer forming. The Barlat 2000 yield criteria and DYNAFORM/LS-DYNA are used for the simulations. Optimal process parameters are determined on the basis of fixed die-binder gap and variable cavity pressure. The results of this study will enhance the knowledge on the mechanics of multilayer structures formed by using the 3A method and expand its commercial applications.
关键词: finite element method (FEM) strain analysis multilayer sheet forming
Fatih Ilhan, Kubra Ulucan-Altuntas, Yasar Avsar, Ugur Kurt, Arslan Saral
《环境科学与工程前沿(英文)》 2019年 第13卷 第5期 doi: 10.1007/s11783-019-1152-1
关键词: Electrochemical treatment Heavy metals Kinetic modeling Pseudo first order kinetic Pseudo second order kinetic
Hybrid forming mechanism of patternless casting and laser cladding
Zhongde SHAN, Fuzhen SUN, Yang LIU
《机械工程前沿(英文)》 2019年 第14卷 第4期 页码 393-401 doi: 10.1007/s11465-019-0550-1
关键词: patternless casting laser cladding hybrid forming rapid tooling
Highlight yield forming and innovative technologies in tropical crops
Wenquan WANG
《农业科学与工程前沿(英文)》 2016年 第3卷 第4期 页码 283-284 doi: 10.15302/J-FASE-2016128
Transient performance comparison of grid-forming converters with different FRT control strategies
《能源前沿(英文)》 2023年 第17卷 第2期 页码 239-250 doi: 10.1007/s11708-022-0856-2
关键词: grid-forming converters (GFMs) fault ride through (FRT) transient stability transient inrush current transient modeling
标题 作者 时间 类型 操作
Finite element simulations of sheet metal forming under complex strain paths
CHEN Wei, YANG Jichang, WU Xiaofeng, LU Dun, GUO Weigang
期刊论文
Properties and effect of forming sewage sludge into lightweight ceramics
Min YUE, Qinyan YUE, Yuanfeng QI, Baoyu GAO, Hui YU
期刊论文
Digital high-efficiency print forming method and device for multi-material casting molds
Zhongde SHAN, Zhi GUO, Dong DU, Feng LIU, Wenjiang LI
期刊论文
Effect of process parameters on the density and porosity of laser melted AlSi10Mg/SiC metal matrix composite
Omotoyosi H. FAMODIMU, Mark STANFORD, Chike F. ODUOZA, Lijuan ZHANG
期刊论文
Interfacial heat transfer coefficient between metal and die during high pressure die casting process
GUO Zhipeng, XIONG Shoumei, CHO SangHyun, CHOI JeongKil
期刊论文
FEM-based strain analysis study for multilayer sheet forming process
Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR
期刊论文
Electrocoagulation process for the treatment of metal-plating wastewater: Kinetic modeling and energy
Fatih Ilhan, Kubra Ulucan-Altuntas, Yasar Avsar, Ugur Kurt, Arslan Saral
期刊论文
Hybrid forming mechanism of patternless casting and laser cladding
Zhongde SHAN, Fuzhen SUN, Yang LIU
期刊论文