Zobrazeno 1 - 10
of 216
pro vyhledávání: '"J. Politis"'
Autor:
Xiao Yang, Heli Liu, Lemeng Zhang, Yiran Hu, Denis J. Politis, Mohammad M. Gharbi, Liliang Wang
Publikováno v:
Friction, Vol 12, Iss 3, Pp 375-395 (2023)
Abstract The accurate representation of tribological boundary conditions at the tool-workpiece interface is crucial for analysis and optimization of formability, material flow, and surface quality of components during metal forming processes. It has
Externí odkaz:
https://doaj.org/article/f69610683ec44158bb4a2b9a20abab05
Autor:
Xiao Yang, Heli Liu, Saksham Dhawan, Denis J. Politis, Jie Zhang, Daniele Dini, Lan Hu, Mohammad M. Gharbi, Liliang Wang
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
The digital transformation and Industry 4.0 technologies are rapidly shaping the future of manufacturing. Here, authors use reliable big data to quantitatively evaluate lubricants performance and select desirable candidates for application in target
Externí odkaz:
https://doaj.org/article/b37a93725b0442a595932c936678f402
Autor:
Mingqing Zhu, Yixian C. Lim, Xiaochuan Liu, Zhaoheng Cai, Saksham Dhawan, Haoxiang Gao, Denis J. Politis
Publikováno v:
International Journal of Lightweight Materials and Manufacture, Vol 4, Iss 3, Pp 269-280 (2021)
The prediction of failure and optimisation of the initial blank shape of a component formed under the complex thermal and mechanical conditions could not simply rely on its thinning or strain. In contrast, the prediction of forming limit of material
Externí odkaz:
https://doaj.org/article/94cf6b88fe0c4b31b3a4c111d345d2b2
Publikováno v:
Frontiers in Mechanical Engineering, Vol 8 (2022)
Tube hydroforming has been widely applied by the automotive sector to produce hollow parts. As a popular tube hydroforming test method, tube hydro-bulging needs an analytical failure model to analyze the formability of tubular materials. In the prese
Externí odkaz:
https://doaj.org/article/6efe4351c86c4f7e93ca6b99a64ecf8f
Autor:
Mateusz Kopec, Denis J. Politis
Publikováno v:
Materials, Vol 16, Iss 9, p 3293 (2023)
With the continuously growing need for more fuel-efficient and sustainable vehicles, the characterization and modeling of metal-forming processes have been indispensable in the development of new products [...]
Externí odkaz:
https://doaj.org/article/836c220a8d9140aeadfef824340be96d
Autor:
Lemeng Zhang, Xiao Yang, Qunli Zhang, Yang Zheng, Xiaochuan Liu, Denis J. Politis, Omer El Fakir, Liliang Wang
Publikováno v:
Physical Sciences Forum, Vol 4, Iss 1, p 11 (2022)
The lubricant behaviour at elevated temperatures was investigated by conducting pin-on-disc tests between P20 tool steel and AA7075 aluminium alloy. The evolutions of coefficient of friction (COF) at elevated temperatures showed three distinct stages
Externí odkaz:
https://doaj.org/article/b3a42bb9060b4e70ab8247f7658219d5
Publikováno v:
Physical Sciences Forum, Vol 4, Iss 1, p 25 (2022)
In the present study, a new Design for Additive Manufacturing (DfAM) method for hot stamping dies is evaluated, namely lattice structured. In order to evaluate the benefits of the lattice structured method with regards to the thermal performance, a h
Externí odkaz:
https://doaj.org/article/39f20f5a1eb144509347ffcc3599a3f5
Autor:
Xiaochuan Liu, Bozhou Di, Xiangnan Yu, Heli Liu, Saksham Dhawan, Denis J. Politis, Mateusz Kopec, Liliang Wang
Publikováno v:
Materials, Vol 15, Iss 12, p 4140 (2022)
In the present work, the compatibility relationship on the failure criteria between aluminium and polymer was established, and a mechanics-based model for a three-layered sandwich panel was developed based on the M-K model to predict its Forming Limi
Externí odkaz:
https://doaj.org/article/f23fccfefd184b21a318561cd84e3dc9
Autor:
Grzegorz Szczęsny, Mateusz Kopec, Denis J. Politis, Zbigniew L. Kowalewski, Adam Łazarski, Tomasz Szolc
Publikováno v:
Materials, Vol 15, Iss 10, p 3622 (2022)
The principal features essential for the success of an orthopaedic implant are its shape, dimensional accuracy, and adequate mechanical properties. Unlike other manufactured products, chemical stability and toxicity are of increased importance due to
Externí odkaz:
https://doaj.org/article/23cd6e8034194d6486834ae3f891cffd
Autor:
Kehuan Wang, Mateusz Kopec, Shupeng Chang, Bao Qu, Jun Liu, Denis J. Politis, Liliang Wang, Gang Liu
Publikováno v:
Materials & Design, Vol 194, Iss , Pp 108948- (2020)
During hot stamping of titanium alloys, insufficient forming temperatures result in limited material formability, whereas temperatures approaching the β phase transus also result in reduced formability due to phase transformation, grain coarsening a
Externí odkaz:
https://doaj.org/article/5a2cbf4880ff4898abfb5600decf2701