A comparison of computational models for wrinkling of pressurized shell-core systems

Brank, Boštjan (avtor), Veldin, Tomo (avtor), Lavrenčič, Marko (avtor), Brojan, Miha (avtor)

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 models are static formulations and the other two are derived in the dynamic framework. For the latter, the energy-decaying time-stepping algorithm is applied, which is suitable for numerically stiff problems, such as shell-core systems, characterized by stiff membrane and soft wrinkling deformation modes. In all cases the core is modeled by elastic springs. As a comparative problem we choose the surface wrinkling of pressurized shell-core spheres. In particular, five systems with different material and geometric properties are computed, which have different wrinkle patterns. A good agreement is found between the results of the models as well as with the relevant references, which provide numerical and experimental results. However, it has been observed that our reduced-order models are blind to the prediction of the secondary transformation % from the dimple-like pattern to the labyrinthine pattern. Another conclusion is that a non-tailored (i.e. standard) shell finite element on an elastic foundation combined with the energy-decaying scheme, provides excellent predictions of the surface wrinkle patterns.

• Jezik: Angleški jezik
• Ključne besede: civil engineering, structures, modeling, surface wrinkling, finite element models, core-shell spheres, energy-decaying
• Vrsta gradiva: Znanstveno delo
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Leto izida: 2020
• Št. strani: Str. 1-24
• Številčenje: Letn. , št.
• PID: 20.500.12556/RUL-121012
• UDK: 624.07:004
• ISSN pri članku: 0020-7462
• DOI: 10.1016/j.ijnonlinmec.2020.103611
• COBISS.SI-ID: 29398019
• Datum objave v RUL: 28.09.2020

Gradivo je del revije

• Naslov: International journal of non-linear mechanics
• Skrajšan naslov: Int. j. non-linear mech.
• Založnik: Pergamon
• ISSN: 0020-7462
• COBISS.SI-ID: 25650432

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
• Začetek licenciranja: 28.09.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: gradbeništvo, konstrukcije, modeliranje, gubanje površine, numerični modeli, sfere z jedrom in trdim ovojem, disipacija energije

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: J2-1722
• Naslov: Numerično modeliranje širjenja razpok v krhkih in duktilnih konstrukcijah