Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Rafal Wróbel"'
Autor:
Jian Tang, Rafal Wróbel, Pooriya Scheel, Willy Gaechter, Christian Leinenbach, Ehsan Hosseini
Publikováno v:
Additive Manufacturing Letters, Vol 9, Iss , Pp 100203- (2024)
Meltpool dimensions play a pivotal role in defining the defects and microstructure state of Laser Powder Bed Fusion (LPBF) builds. Therefore, it is crucial to investigate variations in meltpool geometries under different process conditions. In this w
Externí odkaz:
https://doaj.org/article/d9b3f672444e470daf5b14b146c42fff
Autor:
Vigneashwara Pandiyan, Antonios Baganis, Roland Axel Richter, Rafał Wróbel, Christian Leinenbach
Publikováno v:
Virtual and Physical Prototyping, Vol 19, Iss 1 (2024)
ABSTRACTGrowing demand for multi-material Laser Powder Bed Fusion (LPBF) faces process control and quality monitoring challenges, particularly in ensuring precise material composition. This study explores optical and acoustic emission signals during
Externí odkaz:
https://doaj.org/article/610abd788992460895b96b0a354132ca
Publikováno v:
Materials & Design, Vol 241, Iss , Pp 112919- (2024)
Small scale (∼1:30–1:40) Reinforced Concrete is useful for centrifuge testing. However, manufacturing the reinforcing cages by hand at this scale is practically difficult. This paper suggests that small scale reinforcement can be manufactured usi
Externí odkaz:
https://doaj.org/article/75af99f47d524a608f1186b03b096b08
Autor:
Vigneashwara Pandiyan, Rafał Wróbel, Roland Axel Richter, Marc Leparoux, Christian Leinenbach, Sergey Shevchik
Publikováno v:
Materials & Design, Vol 235, Iss , Pp 112458- (2023)
This study presents a self-supervised Bayesian Neural Network (BNN) framework using air-borne Acoustic Emission (AE) to identify different Laser Powder Bed Fusion (LPBF) process regimes such as Lack of Fusion, conduction mode, and keyhole without gro
Externí odkaz:
https://doaj.org/article/095c3f45da764145aa753e6f0cb652db
Autor:
Pooriya Gh Ghanbari, Patrik Markovic, Steven Van Petegem, Malgorzata Grazyna Makowska, Rafal Wrobel, Thomas Mayer, Christian Leinenbach, Edoardo Mazza, Ehsan Hosseini
Publikováno v:
Additive Manufacturing Letters, Vol 6, Iss , Pp 100150- (2023)
In laser powder bed fusion (LPBF), complex components are manufactured layer-by-layer via scanning the cross-sections of a 3D CAD model using a high intensity laser. Throughout this process, the material is exposed to temperature profiles that signif
Externí odkaz:
https://doaj.org/article/23e62e79bc41485c918fa22cca67e1f9
Publikováno v:
Applied Sciences, Vol 14, Iss 6, p 2658 (2024)
This paper investigates innovative methods for enhancing heat transfer efficiency in high-power permanent magnet electrical machines. The objectives are to quantify the effects of increasing the air speed, increasing the turbulence intensity, and int
Externí odkaz:
https://doaj.org/article/c2dce443e64f4ee483271e98957805e2
Autor:
Rafal Wrobel
Publikováno v:
Archives of Electrical Engineering, Vol vol. 71, Iss No 1, Pp 175-187 (2022)
The continuous drive towards electrified propulsion systems has been imposing ever more demanding performance and cost targets for the future power electronics, machines and drives (PEMDs). This is particularly evident when exploring various technolo
Externí odkaz:
https://doaj.org/article/755dfebf5f5647f39865389a06f1b45d
Autor:
Rafał Wróbel, Ilona Kiga Wróbel
Publikováno v:
Safety & Fire Technology, Vol 57, Iss 1, Pp 50-62 (2021)
Purpose: The paper presents the results of the review of literature and of the legal regulations in the field of the protection of critical infrastructure in Poland during the COVID-19 pandemic. The assumed main goal was to determine the requirements
Externí odkaz:
https://doaj.org/article/52eaa5b3ae404f678c007fdd6bcd81e1
Autor:
Robert Piec, Marcin Cisek, Rafał Wróbel, Michał Sowa, Marcin Wiechetek, Wiktor Gawroński, Barbara Szykuła-Piec, Katarzyna Michalak
Publikováno v:
Safety & Fire Technology, Vol 56, Iss 2, Pp 40-60 (2020)
Aim: The article presents the results of research on the evacuation times of passengers of three different trains used by the Warsaw metro. In emergency situations on metro trains, fast and safe evacuation is crucial for saving passengers’ health a
Externí odkaz:
https://doaj.org/article/1448c3aed7374a60aeb056e989621331
Autor:
Pawel Gromek, Rafal Wrobel
Publikováno v:
Communications, Vol 22, Iss 4, Pp 173-181 (2020)
The paper presents a fire service determined picture of road safety in Poland in its operational (non-system and system) dimensions. It focuses on the road risk assessment, using data related to interventions conducted in 2015-2019 by entities of the
Externí odkaz:
https://doaj.org/article/1da871b25c6545efb43477f1f68ebe53