Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jarno J. J. Kaakkunen"'
Publikováno v:
Procedia Manufacturing. 25:55-61
A Micro Manufacturing Unit (MMU) used in this research is a digital twin research environment to study how to construct a digital twin and what kind of information is needed to describe the realistic behavior of the digital model of a micro manufactu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36cb528111dd12e9d694927976e75b99
https://doi.org/10.1016/j.promfg.2018.06.057
https://doi.org/10.1016/j.promfg.2018.06.057
Publikováno v:
Procedia Manufacturing. 25:435-442
Correctly designed nature inspired micrometer size grooves i.e. riblets can be used to reduce drag. There exist several methods to manufacture these structures but all of them have their own problems and disadvantages, wherefore they are not perfectl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b35dfe3ad597a7ca90d28a7d89a3e92
https://doi.org/10.1016/j.promfg.2018.06.114
https://doi.org/10.1016/j.promfg.2018.06.114
Autor:
Juho Ratava, Mika Lohtander, Elodie Garcia, Jarno Volotinen, Minna Lanz, Jarno J. J. Kaakkunen
Publikováno v:
Procedia Manufacturing. 17:468-475
A Micro Manufacturing Unit (MMU) used in this research is meant for digital twin research environment to study how to construct a digital twin from scratch and what kind of information is needed to describe the realistic behavior of the digital model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4bdb1ac56db7be18f8612f75301497c
https://doi.org/10.1016/j.promfg.2018.10.071
https://doi.org/10.1016/j.promfg.2018.10.071
Publikováno v:
Procedia Manufacturing. 17:14-21
In this paper a short i.e. nanosecond pulse laser ablation is utilized to fabricate trapezoidal shaped microstructures i.e. riblets that are known to reduce friction. They can be applied for example in turbomachinery applications to make system more
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7117da1e9c836d59b4c8889b2838dafa
https://doi.org/10.1016/j.promfg.2018.10.006
https://doi.org/10.1016/j.promfg.2018.10.006
Publikováno v:
Wlodarczyk, K, Kaakkunen, J J J, Vahimaa, P & Hand, D P 2014, ' Efficient speckle-free laser marking using a spatial light modulator ', Applied Physics A: Materials Science and Processing, vol. 116, no. 1, pp. 111-118 . https://doi.org/10.1007/s00339-013-8186-1
An approach for laser marking surfaces using a liquid–crystal-based spatial light modulator (LC-SLM) for beam patterning and manipulation is presented, designed to avoid the speckle interference problem which is a typical drawback of current SLM-ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5819902687cf60ceb30baab8e1d15b0e
https://doi.org/10.1007/s00339-013-8186-1
https://doi.org/10.1007/s00339-013-8186-1
Publikováno v:
Silvennoinen, M, Kaakkunen, J, Päiväsaari, K & Vahimaa, P 2013, ' Parallel Microstructuring using Femtosecond Laser and Spatial Light Modulator ', Physics Procedia, vol. 41, pp. 693-697 . https://doi.org/10.1016/j.phpro.2013.03.135
The spatial light modulator together with the computer generated holograms can be used to shape laser beam to correspond for specific need of the micromachining task. Especially dividing the original laser energy to beam array enables high degree of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25b8ab3064861569789e2f8c2ad37ebd
Publikováno v:
Applied Surface Science. 265:865-869
We have studied femtosecond ablation under sprayed thin water film and its influence and benefits compared with ablation in the air atmosphere. These have been studied in case of the hole and the groove ablation using IR femtosecond laser. Water enha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71ddd91134a8e63581c531341285652e
https://doi.org/10.1016/j.apsusc.2012.11.135
https://doi.org/10.1016/j.apsusc.2012.11.135
Autor:
Pasi Vahimaa, Kimmo Paivasaari, Anni Lehmuskero, Victor Moshchalkov, Jarno J. J. Kaakkunen, Victor Tikhomirov, Mikko Silvennoinen
Publikováno v:
Applied Surface Science. 257:6829-6832
The centimeter range one- and two-dimensional nanostructures of 70 nm pitch have been imprinted by hot pressing with a quartz, silicon or nickel mold, at 240 °C, onto the surface of Ge 20 As 20 Se 14 Te 46 semiconductor glass. Excellent glass stabil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df062dbda57105dcab7b7fbe5fb6d518
https://doi.org/10.1016/j.apsusc.2011.03.007
https://doi.org/10.1016/j.apsusc.2011.03.007
Publikováno v:
Applied Physics A. 103:267-270
We present a novel method to fabricate hole arrays by forming a four-beam interference pattern with two gratings. In this method a femtosecond laser beam is split into four and collected to interfere using two cascaded diffractive gratings. One benef
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2902f8bc38e8ec797955dea27ae5dc2
https://doi.org/10.1007/s00339-011-6366-4
https://doi.org/10.1007/s00339-011-6366-4
Publikováno v:
Applied Physics A. 94:215-220
Recently, the enhancing of bulk metals optical absorption with focused femtosecond pulses was demonstrated. This absorption enhancement is caused by different nano- and micro-structures which are formed during laser ablation with ultrashort pulses. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cad4ca09f51336be9c09981913f77592
https://doi.org/10.1007/s00339-008-4895-2
https://doi.org/10.1007/s00339-008-4895-2