Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Marko Lavrenčič"'
Hybrid-Mixed Low-Order Finite Elements for Geometrically Exact Shell Models: Overview and Comparison
Autor:
Boštjan Brank, Marko Lavrenčič
Publikováno v:
Archives of Computational Methods in Engineering. 28:3917-3951
We critically review and compare fifteen mixed and mixed-hybrid nonlinear shell finite element formulations with 4 nodes in order to identify those that are closest to the “optimal” one. We consider formulations that are based either on Assumed N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3058069502232e6acb7ffa3980fe793
https://doi.org/10.1007/s11831-021-09537-2
https://doi.org/10.1007/s11831-021-09537-2
Autor:
Boštjan Brank, Marko Lavrenčič
Publikováno v:
Computational mechanics, vol. 65, no. 1, pp. 177-192, 2020.
We compare three nearly optimal quadrilateral finite elements for geometrically exact inextensible-director shell model. Two of them are revisited and one is novel. The assumed natural strain (ANS) element of Ko et al. (Comput Struct 185:1–14, 2017
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4956a4e877fa17a104247a8232fdebcd
https://repozitorij.uni-lj.si/IzpisGradiva.php?id=114876
https://repozitorij.uni-lj.si/IzpisGradiva.php?id=114876
Autor:
Marko Lavrenčič, Boštjan Brank
Publikováno v:
Thin-Walled Structures. 132:682-699
Shell buckling process is studied by implicit structural dynamics time-stepping schemes with numerical dissipation (in the high-frequency range), which fall into the class of Generalized energy-momentum method. In particular, modified Generalized- α
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fdbf6669236f4a1c7bdc2051f261382
https://doi.org/10.1016/j.tws.2018.08.010
https://doi.org/10.1016/j.tws.2018.08.010
Publikováno v:
Communications in Nonlinear Science and Numerical Simulation
Communications in nonlinear science and numerical simulation, vol. 101, no. 105897, 2021.
Communications in nonlinear science and numerical simulation, vol. 101, no. 105897, 2021.
Many shape memory alloy (SMA) applications, such as biomedical devices, electromechanical actuators, and elastocaloric cooling devices, are based on thin-walled flat or shell-like structures. An advanced design of such structures requires the develop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92f6ff9674e3a5c5e4d203e2db2fa58b
https://doi.org/10.1016/j.cnsns.2021.105897
https://doi.org/10.1016/j.cnsns.2021.105897
Energy-decaying and momentum-conserving schemes for transient simulations with mixed finite elements
Autor:
Boštjan Brank, Marko Lavrenčič
Publikováno v:
Computer Methods in Applied Mechanics and Engineering. 375:113625
We present the four-field (of displacements, velocities, stresses and strains) and the three-field (of displacements, velocities and stresses) mixed variational formulations for structural dynamics, which can be used to derive in an elegant way the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3ca30e765963eb16672c907e56ad787
https://doi.org/10.1016/j.cma.2020.113625
https://doi.org/10.1016/j.cma.2020.113625
Publikováno v:
International Journal of Non-Linear Mechanics. 127:103611
Four nonlinear computational models for the surface wrinkling of curved shell-core systems under external pressure are presented. Three of the considered finite element models neglect the displacements tangential to the shell surface. Two of the mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2800cf237b6b01c1484eef721d655f4b
https://doi.org/10.1016/j.ijnonlinmec.2020.103611
https://doi.org/10.1016/j.ijnonlinmec.2020.103611
Autor:
Marko Lavrenčič, Boštjan Brank
Publikováno v:
Thin-walled structures, vol. 157, no. 107075, pp. 1-22, 2020.
We revisit some existing time-stepping schemes for structural dynamics with the algorithmic dissipation that fall either into the class of generalized- α methods or into the class of energy-decaying (and momentum-conserving) methods. Some of the con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1e0c219aa322d13e642b4b429eea82d
https://doi.org/10.1016/j.tws.2020.107075
https://doi.org/10.1016/j.tws.2020.107075
Publikováno v:
Thin-walled structures, vol. 150, no. 1, 106700, pp. 1-12, 2020.
We propose an efficient computational model for predicting the surface wrinkling in axially compressed bi-layer cylindrical shell-substrate composites. To capture the transitions between the wrinkling modes in the far post-buckling regime, we use imp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::925d9cb1600a64957058a2f244340380
https://doi.org/10.1016/j.tws.2020.106700
https://doi.org/10.1016/j.tws.2020.106700
Autor:
Boštjan Brank, Marko Lavrenčič
Publikováno v:
Advanced Structured Materials ISBN: 9783030177461
Two topics are addressed: (i) hybrid-mixed formulations for geometrically exact shell models, and (ii) post-buckling analysis of shells by implicit dynamics schemes. As for the hybrid-mixed elements, seven formulations are compared. The one with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94ab6015aed5ef30d89a2463bcca11e0
https://doi.org/10.1007/978-3-030-17747-8_21
https://doi.org/10.1007/978-3-030-17747-8_21
Publikováno v:
Arhivi. 2023, Vol. 46 Issue 2, p369-383. 15p.