Zobrazeno 1 - 10
of 131
pro vyhledávání: '"Harri Hakula"'
Autor:
Harri Hakula
Publikováno v:
Vibration, Vol 6, Iss 3, Pp 566-583 (2023)
New applications introduced capsule designs with features that have not been fully analysed in the literature. In this study, thin shells of revolution are used to model drug delivery capsules both with closed and open designs including perforations.
Externí odkaz:
https://doaj.org/article/fcc25afa52074fc5bab6c98d112526a6
Autor:
Harri Hakula
Publikováno v:
Eng, Vol 4, Iss 1, Pp 884-902 (2023)
Shell structures have a rich family of boundary layers including internal layers. Each layer has its own characteristic length scale, which depends on the thickness of the shell. Some of these length scales are long, something that is not commonly co
Externí odkaz:
https://doaj.org/article/44d69769e47446ab93f22b286ad77e49
Autor:
Harri Hakula
Publikováno v:
Applied Mechanics, Vol 3, Iss 3, Pp 974-994 (2022)
Engineering structures are often assembled from parts with different materials. When uncertainty quantification techniques are applied, the curse of dimensionality increases the computational complexity. Here, a stochastic Galerkin method for planar
Externí odkaz:
https://doaj.org/article/ec57c4f1d3394a8bba619827d29d249f
Autor:
Harri Hakula
Publikováno v:
Applied Mechanics, Vol 3, Iss 3, Pp 1091-1106 (2022)
Recent advances in drug delivery technology have led to renewed interest in shell structures with mixed kinematical constraints, one end clamped, another one free, the so-called sensitive shells. It is known that elliptic sensitive shell problems may
Externí odkaz:
https://doaj.org/article/91db7474f1b4472fbe8d2273bf465ba4
Autor:
Harri Hakula, Mikael Laaksonen
Publikováno v:
Applied Mechanics, Vol 3, Iss 1, Pp 1-13 (2021)
Stochastic eigenvalue problems are nonlinear and multiparametric. They require their own solution methods and remain one of the challenge problems in computational mechanics. For the simplest possible reference problems, the key is to have a cluster
Externí odkaz:
https://doaj.org/article/5d0a8289c7d1472791e89f3cdd4a46f0
Autor:
Harri Hakula
Publikováno v:
Applied Sciences, Vol 13, Iss 16, p 9232 (2023)
Biodegradable materials pose challenges over all aspects of computational mechanics. In this study, the focus is on the resulting domain uncertainty. Model structures or devices are shells of revolution subject to random variation of the outer surfac
Externí odkaz:
https://doaj.org/article/1f5f3fae553b42a0aa042c57a75eb50a
Autor:
Harri Hakula
Publikováno v:
Mathematical and Computational Applications, Vol 27, Iss 4, p 57 (2022)
In recent years, the standard numerical methods for partial differential equations have been extended with variants that address the issue of domain discretisation in complicated domains. Sometimes similar requirements are induced by local parameter-
Externí odkaz:
https://doaj.org/article/a45504758525447685ff8c6f800f9caa
Autor:
Harri Hakula, Mikael Laaksonen
Publikováno v:
Applied Sciences, Vol 12, Iss 7, p 3559 (2022)
Frequency response analysis under uncertainty is computationally expensive. Low-rank approximation techniques can significantly reduce the solution times. Thin perforated cylinders, as with all shells, have specific features affecting the approximati
Externí odkaz:
https://doaj.org/article/e37429f828ab44a7a053bf46ccd7dd3b
Autor:
Stefano Giani, Harri Hakula
Publikováno v:
Journal of Computational and Applied Mathematics, 2023, Vol.428, pp.115165 [Peer Reviewed Journal]
Funding Information: We would like to thank an anonymous referee for valuable comments that improved the quality of the paper. Publisher Copyright: © 2023 The Author(s) Sensitive shells are a class of constructions with specific and perhaps unintuit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b28d7b6ced365aa3609bfad1d2fb0a65
https://aaltodoc.aalto.fi/handle/123456789/120503
https://aaltodoc.aalto.fi/handle/123456789/120503
Publikováno v:
Shock and Vibration, Vol 2018 (2018)
Numerical simulation of thin solids remains one of the challenges in computational mechanics. The 3D elasticity problems of shells of revolution are dimensionally reduced in different ways depending on the symmetries of the configurations resulting i
Externí odkaz:
https://doaj.org/article/158cb06b1acc4ff0a0b66b0953869bd2