Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Sophoclis Patsias"'
Autor:
Junyi Zhou, Yuan Xu, Maureen Aceves Lopez, Lukasz Farbaniec, Sophoclis Patsias, Duncan Macdougall, Julian Reed, Nik Petrinic, Daniel Eakins, Clive Siviour, Antonio Pellegrino
In this paper, we present the dynamic response of commercially pure copper subjected to combined tension-torsion loads representative of real case impact scenarios. Experiments were conducted both quasi statically, at a strain rate equal to 10−3 s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7c17cbfc409e39e6b8ce98aa5ae8f22
https://ora.ox.ac.uk/objects/uuid:4c5e8602-cb65-471a-82ec-7658901ec1df
https://ora.ox.ac.uk/objects/uuid:4c5e8602-cb65-471a-82ec-7658901ec1df
Autor:
Antonio Pellegrino, Macdougall Duncan A, Junyi Zhou, Yuan Xu, Nik Petrinic, Sophoclis Patsias, Clive R. Siviour, Daniel E. Eakins, Julian Mark Reed, Lukasz Farbaniec
Publikováno v:
EPJ Web of Conferences, Vol 250, p 01025 (2021)
The Photon Doppler Velocimetry (PDV) technique is used to capture simultaneously propagating elastic waves of longitudinal and shear nature in a Tension-Torsion Hopkinson Bar (TTHB) apparatus. The system uses a pair of probes per velocity measurement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10ccf440d145f61beb7d4d0d446dffe1
https://www.epj-conferences.org/articles/epjconf/pdf/2021/04/epjconf_dymat2021_01025.pdf
https://www.epj-conferences.org/articles/epjconf/pdf/2021/04/epjconf_dymat2021_01025.pdf
Autor:
Neriman Ozada, Fabrizio Scarpa, Mostafa Ranjbar, Sophoclis Patsias, Luca Boldrin, Mohammad Sadegh Mazloomi
Publikováno v:
Composite Structures. 187:593-603
This paper describes the vibroacoustic behavior of sandwich panels with a novel core topology made from 2-dimensionally gradient auxetic hexagonal honeycombs. The 2D gradient core enables a tailoring of localized mechanical properties of the sandwich
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7283104f6e8da6b7e6a4dae4b1c521b7
https://doi.org/10.1016/j.compstruct.2017.10.077
https://doi.org/10.1016/j.compstruct.2017.10.077
Autor:
Loic Salles, Sophoclis Patsias, Amin Chabchoub, Norbert Hoffmann, Alan R Champneys, Aurélien Grolet, Francesco Fontanela
Publikováno v:
Mechanical Systems and Signal Processing
Mechanical Systems and Signal Processing, Elsevier, 2019, 117, pp.280-292. ⟨10.1016/j.ymssp.2018.08.011⟩
Fontanela, F, Grolet, A, Salles, L, Chabchoub, A, Champneys, A R, Patsias, S & Hoffmann, N 2019, ' Dissipative solitons in forced cyclic and symmetric structures ', Mechanical Systems and Signal Processing, vol. 117, pp. 280-292 . https://doi.org/10.1016/j.ymssp.2018.08.011
Mechanical Systems and Signal Processing, Elsevier, 2019, 117, pp.280-292. ⟨10.1016/j.ymssp.2018.08.011⟩
Fontanela, F, Grolet, A, Salles, L, Chabchoub, A, Champneys, A R, Patsias, S & Hoffmann, N 2019, ' Dissipative solitons in forced cyclic and symmetric structures ', Mechanical Systems and Signal Processing, vol. 117, pp. 280-292 . https://doi.org/10.1016/j.ymssp.2018.08.011
The emergence of localised vibrations in cyclic and symmetric rotating struc-tures, such as bladed disks of aircraft engines, has challenged engineers in thepast few decades. In the linear regime, localised states may arise due to alack of symmetry,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d2a53ca52491d157c523e6881894486
https://hal.archives-ouvertes.fr/hal-02290246/file/LISPEN_MSSP_2019_GROLET.pdf
https://hal.archives-ouvertes.fr/hal-02290246/file/LISPEN_MSSP_2019_GROLET.pdf
Publikováno v:
Model Validation and Uncertainty Quantification, Volume 3 ISBN: 9783319747927
Linear FE-models are commonly validated with measured data obtained from experimental test conducted under similar FE-simulated boundary conditions. However, measured data at higher or operational amplitudes of vibration often exhibit evidence of non
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b43d76acfeb11655ebbb9995a86cb699
https://doi.org/10.1007/978-3-319-74793-4_6
https://doi.org/10.1007/978-3-319-74793-4_6
We develop a real-coded constrained genetic algorithm (GA) and assess its performance for the case of selected classical optimisation problems. The proposed GA uses a roulette selection method, BLX-α crossover operation, non-uniform mutation along w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae4db998881122cdf7ea85fba693cdf2
http://hdl.handle.net/10044/1/56649
http://hdl.handle.net/10044/1/56649
Publikováno v:
Journal of Sound and Vibration. 350:185-198
© 2015 Elsevier Ltd.abstract The work describes an assessment of subset simulation (SubSim) techniques to increase the computational efficiency for the predictions of probabilistic dynamic behaviour in mistuned bladed disc systems. SubSim is an adap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b760f1233a81a8e1c0bed438a4590d08
https://doi.org/10.1016/j.jsv.2015.04.015
https://doi.org/10.1016/j.jsv.2015.04.015
Autor:
Giuliano Allegri, Jie Yuan, Fabrizio Scarpa, Ramesh Rajasekaran, Branislav Titurus, Sophoclis Patsias
Publikováno v:
Journal of Vibration and Acoustics. 139
The work investigates the application of a novel frame model to reduce computational cost of the mistuning analysis of bladed disk systems. A full-scale finite element (FE) model of the bladed disk is considered as benchmark. The frame configuration
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::efaa6714e64a3181871df558df543f6f
https://doi.org/10.1115/1.4036110
https://doi.org/10.1115/1.4036110
Autor:
Ramesh Rajasekaran, Giuliano Allegri, Sophoclis Patsias, Jie Yuan, Fabrizio Scarpa, Branislav Titurus
Publikováno v:
Yuan, J, Scarpa, F, Allegri, G, Titurus, B, Patsias, S & Rajasekaran, R 2017, ' Efficient computational techniques for mistuning analysis of bladed discs : A review ', Mechanical Systems and Signal Processing, vol. 87 Part A, pp. 71–90 . https://doi.org/10.1016/j.ymssp.2016.09.041
This paper describes a review of the relevant literature about mistuning problems in bladed disc systems, and their implications for the uncertainty propagation associated to the dynamics of aeroengine systems. An emphasis of the review is placed on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9e07aacfaf081d0ddaabef8ddc407dc
https://strathprints.strath.ac.uk/74940/1/Yuan_etal_MSSP_2016_Efficient_computational_techniques_for_mistuning_analysis.pdf
https://strathprints.strath.ac.uk/74940/1/Yuan_etal_MSSP_2016_Efficient_computational_techniques_for_mistuning_analysis.pdf
Publikováno v:
Ranjbar, M, Boldrin, L, Scarpa, F, Neild, S A & Patsias, S 2016, ' Vibroacoustic optimization of anti-tetrachiral and auxetic hexagonal sandwich panels with gradient geometry ', Smart Materials and Structures, vol. 25, no. 5, 054012 . https://doi.org/10.1088/0964-1726/25/5/054012
The work describes the vibroacoustic behavior of anti-tetrachiral and auxetic hexagonal gradient sandwich panels using homogenized finite element models to determine the mechanical properties of the auxetic structures, the natural frequencies and rad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56f5b036819132463eb8984f228e462e
https://hdl.handle.net/1983/cd8787b7-2909-4b59-b59c-7625ba2dac88
https://hdl.handle.net/1983/cd8787b7-2909-4b59-b59c-7625ba2dac88