检索范围:
排序: 展示方式:
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
Precision forging technology for aluminum alloy
Lei DENG, Xinyun WANG, Junsong JIN, Juchen XIA
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 25-36 doi: 10.1007/s11465-018-0477-y
Aluminum alloy is a preferred metal material for lightweight part manufacturing in aerospace, automobile, and weapon industries due to its good physical properties, such as low density, high specific strength, and good corrosion resistance. However, during forging processes, underfilling, folding, broken streamline, crack, coarse grain, and other macro- or microdefects are easily generated because of the deformation characteristics of aluminum alloys, including narrow forgeable temperature region, fast heat dissipation to dies, strong adhesion, high strain rate sensitivity, and large flow resistance. Thus, it is seriously restricted for the forged part to obtain precision shape and enhanced property. In this paper, progresses in precision forging technologies of aluminum alloy parts were reviewed. Several advanced precision forging technologies have been developed, including closed die forging, isothermal die forging, local loading forging, metal flow forging with relief cavity, auxiliary force or vibration loading, casting-forging hybrid forming, and stamping-forging hybrid forming. High-precision aluminum alloy parts can be realized by controlling the forging processes and parameters or combining precision forging technologies with other forming technologies. The development of these technologies is beneficial to promote the application of aluminum alloys in manufacturing of lightweight parts.
关键词: precision forging aluminum alloy closed die forging flow control forging hybrid-forming technology
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
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
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
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
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
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
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
复杂曲面薄壁构件流体压力成形理论与技术研究进展 Review
苑世剑
《工程(英文)》 2021年 第7卷 第3期 页码 358-366 doi: 10.1016/j.eng.2020.08.014
面向航空航天、汽车和高速列车等工业领域迫切需求的管、板和壳三类典型结构以及难变形材料构件,新一代流体压力成形技术得到迅速发展。本文系统介绍了管类构件低载荷液压成形、板类构件双向加压成形、椭球壳体无模液压成形和难变形材料双调热介质成形理论与工艺的最新研究进展,重点阐述了变形行为、应力调控、缺陷控制和典型应用。此外,本文还展望了流体压力成形技术的未来发展方向,包括超大尺度非均质构件超低载荷成形、金属间化合物和高熵合金构件精密成形、智能化流体压力成形工艺与装备,以及非均质强各向异性薄壳的精确有限元仿真。
徐祖耀
《中国工程科学》 2004年 第6卷 第1期 页码 16-21
材料塑性成形与热处理一体化工程的理论基础,主要为应力—相变—形变间冶金交互作用和力学交互作用的机制、建模以及组织与性能变化的模拟。以钢为例,介绍了应力下铁素体、珠光体相变的文献工作,并提出0.38C-Cr-Mo钢在应力下铁素体形成和珠光体相变的动力学模型以及组织变化的计算机模拟;讨论了Scheil相加性原则的不足及其修正途径;略述应力对钢中贝氏体相变及马氏体相变的影响;简介相场理论及其应用。对材料在应力下相变理论、建模与组织模拟的后续研究工作提出了展望。
Intelligent hybrid power generation system using new hybrid fuzzy-neural for photovoltaic system and
Alireza REZVANI,Ali ESMAEILY,Hasan ETAATI,Mohammad MOHAMMADINODOUSHAN
《能源前沿(英文)》 2019年 第13卷 第1期 页码 131-148 doi: 10.1007/s11708-017-0446-x
关键词: photovoltaic wind turbine hybrid system fuzzy logic controller genetic algorithm RBFNSM
周建忠,张兴权,王广龙,杨超君,张永康
《中国工程科学》 2005年 第7卷 第11期 页码 94-97
激光喷丸塑性成形金属板料是从激光强化发展起来的新技术。当激光诱导冲击波的峰值超过材料的 动态屈服极限时,板料冲击区的表层发生微观塑性变形,导致了板料厚度方向上不均勻应力分布,使板料发生 宏观变形。不同的激光脉冲参数在板料内部产生不同的残余应力,不同的残余应力使板料发生不同的变形,通 过控制喷丸的工艺参数来控制板料内部应力场的精确分布,就可实现板料的精确变形。其显著特点是成形精确, 且表层留有有益的残余压应力。
Robust ensemble of metamodels based on the hybrid error measure
《机械工程前沿(英文)》 2021年 第16卷 第3期 页码 623-634 doi: 10.1007/s11465-021-0641-7
关键词: metamodel ensemble of metamodels hybrid error measure stochastic problem
标题 作者 时间 类型 操作
Hybrid forming mechanism of patternless casting and laser cladding
Zhongde SHAN, Fuzhen SUN, Yang LIU
期刊论文
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
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
FEM-based strain analysis study for multilayer sheet forming process
Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR
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
Transient performance comparison of grid-forming converters with different FRT control strategies
期刊论文
Intelligent hybrid power generation system using new hybrid fuzzy-neural for photovoltaic system and
Alireza REZVANI,Ali ESMAEILY,Hasan ETAATI,Mohammad MOHAMMADINODOUSHAN
期刊论文