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Finite element simulations of sheet metal forming under complex strain paths

CHEN Wei, YANG Jichang, WU Xiaofeng, LU Dun, GUO Weigang

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4, Pages 399-403 doi: 10.1007/s11465-007-0069-8

Abstract: Fracture is a common defect in sheet metal forming and it is essentially caused by tensile instabilityThis paper analyzes some experiments and theories for building forming limit diagrams of sheet metalthis, a method that integrates the finite element simulation and experiment was used to research the formingFinally, the forming method of the rear hanger is confirmed.complex strain paths and different strain paths will have great impacts on the result of the sheet metal forming

Keywords： dangerous forming method different hanger forming

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Digital high-efficiency print forming method and device for multi-material casting molds

Zhongde SHAN, Zhi GUO, Dong DU, Feng LIU, Wenjiang LI

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2, Pages 328-337 doi: 10.1007/s11465-019-0574-6

Abstract: This study proposes a novel high-efficiency print forming method and device for multi-material castingThe proposed method is specifically related to the integrated forming of two-way coating and printingThese processes can realize the high-efficiency print forming of high-performance sand molds.The integrated forming method for layered heating and roller compaction presented in this study effectively

Keywords： multi-material casting mold 3D printing efficient print forming method

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Formation mechanism and modeling of surface waviness in incremental sheet forming

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0679-1

Abstract: Improving and controlling surface quality has always been a challenge for incremental sheet forming (

Keywords： surface waviness incremental sheet forming numerical simulation formation mechanism deformation history

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FEM-based strain analysis study for multilayer sheet forming process

Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 373-379 doi: 10.1007/s11465-015-0371-9

Abstract: Different forming modes such as wrinkling and fracture are discussed by using experimental and numericalHydroforming is used for multilayer forming.

Keywords： finite element method (FEM) strain analysis multilayer sheet forming

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Hybrid forming mechanism of patternless casting and laser cladding

Zhongde SHAN, Fuzhen SUN, Yang LIU

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4, Pages 393-401 doi: 10.1007/s11465-019-0550-1

Abstract: In accordance with the requirement of manufacturing dies quickly and economically, a hybrid forming methodAn experimental study is conducted on the hybrid forming process and its trial production and application

Keywords： patternless casting laser cladding hybrid forming rapid tooling

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Highlight yield forming and innovative technologies in tropical crops

Wenquan WANG

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 4, Pages 283-284 doi: 10.15302/J-FASE-2016128

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Properties and effect of forming sewage sludge into lightweight ceramics

Min YUE, Qinyan YUE, Yuanfeng QI, Baoyu GAO, Hui YU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1, Pages 117-124 doi: 10.1007/s11783-010-0220-3

Abstract: In this work we investigated the chemical, thermal and toxic properties of dried sewage sludge (DSS), the preparation and properties of lightweight sludge ceramic (LSC) and the mechanisms of action of the organic and inorganic foaming agents (OFAs and IFAs). The chemical components and thermal properties of the raw materials were studied by Energy Dispersive X-ray Detection (EDX) and Thermogravimetric Analysis and Differential Scanning Calorimetry (DSC/TGA). The mineral phases of the raw materials and the formed ceramics were determined by X-ray Diffraction (XRD). The leaching characteristics of heavy metals were investigated with Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). Different ratios of DSS and clay were mixed and pressed into raw pellets. After drying and preheating treatment, the raw pellets were sintered at 1150°C for 10 min. The physical properties of LSC (50 wt% DSS added) were tested. The results showed that when the addition of DSS was above 50 wt%, LSC began to shrink, and a maximum density occurred. The environmental safety of LSC was satisfactory. XRD showed that some new mineral phases formed in the LSC. Observation of the microstructure by Scanning Electron Microscope (SEM) indicated that the body of LSC was porous.

Keywords： sludge foaming agents ceramics preheating process

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Transient performance comparison of grid-forming converters with different FRT control strategies

Frontiers in Energy 2023, Volume 17, Issue 2, Pages 239-250 doi: 10.1007/s11708-022-0856-2

Abstract: Grid-forming converters (GFMs) are faced with the threat of transient inrush current and synchronization

Keywords： grid-forming converters (GFMs) fault ride through (FRT) transient stability transient inrush current

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Fundamentals and Processes of Fluid Pressure Forming Technology for Complex Thin-Walled Components Review

Shijian Yuan

Engineering 2021, Volume 7, Issue 3, Pages 358-366 doi: 10.1016/j.eng.2020.08.014

Abstract:

A new generation of fluid pressure forming technology has been developed for the three typical structureshydroforming of sheet components, die-less hydroforming of ellipsoidal shells, and dual hardening hot medium formingIn addition, future development directions of fluid pressure forming technology are discussed, includinghyper lower-loading forming for ultra-large non-uniform components, precision forming for intermetallic

Keywords： Fluid pressure forming Hydroforming Hot medium pressure forming Thin-walled components Stress state

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Automobile Lightweight Technology: Development Trends of Aluminum/Magnesium Alloys and Their Forming

Fu Penghuai,Peng Liming and Ding Wenjiang

Strategic Study of CAE 2018, Volume 20, Issue 1, Pages 84-90 doi: 10.15302/J-SSCAE-2018.01.012

Abstract: justify;">This study reviews the development of aluminum and magnesium alloys, including new materials, forming

Keywords： automobile lightweight aluminum alloy magnesium alloy forming technology development trend

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Fundamentals of the Unified Technology Combining Plastic Forming and Heat Treatment of Materials

Xu Zuyao (T. Y. Hsu)

Strategic Study of CAE 2004, Volume 6, Issue 1, Pages 16-21

Abstract:

Fundamentals of the unified technology combining plastic forming and heat treatment of materials mainly

Keywords： plastic forming-heat treatment transformation under stresses transformation modeling structural simulation

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A New Technology of Plastic Forming Plate by Laser Peening

Zhou Jianzhong,Zhang Xingquan,Wang Guanglong,Yang Chaojun,Zhang Yongkang

Strategic Study of CAE 2005, Volume 7, Issue 11, Pages 94-97

Abstract:

Laser peening forming is an emerging modern process developed from laser shock strengthening.Laser peening forming is a flexible technology, which can form tight radii in thick material with high

Keywords： laser peening forming plate residual stress

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Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 308-311 doi: 10.1007/s11465-011-0233-z

Abstract:

Ductile fracture criterion is key limitation parameter in material forming.The comparing results show that metal forming process under high triaxiality can be estimated successively

Keywords： ductile fracture criteria metal forming process material experiment stress triaxiality

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Research of Glasses Forming Ability of Bulk Metallic Glasses Based on Kinetics

Cai Anhui,Pan Ye,Sun Guoxiong,Ruan Xuping

Strategic Study of CAE 2004, Volume 6, Issue 1, Pages 68-73

Abstract:

The key step of exploiting new type BMG is to judge quickly the glass forming ability (GFA) of bulkThe minimum of T_rg for forming the BMG was 0.4066, at the same time, two theory optimum T<

Keywords： kinetics bulk metal glasses glass forming ability addition principle stability

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The lean forming technology for auto sheet metal

Lin Zhongqin,Li Shuhui,Wang Wurong,Lai Xinmin

Strategic Study of CAE 2009, Volume 11, Issue 11, Pages 22-29

Abstract:

The lean forming technology for auto sheet metal has been proposed, whichconsists of a proper material selection method considering the forming characteristic, a hybrid optimizationAiming at decreasing the forming sensitivity to variation in materials and process, a forming robustThe technical framework for auto sheet metal lean forming was constructed based on the idea of proper

Keywords： auto sheet metal lean forming proper material selection process optimization robust control