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

Povzetek

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.

Ključne besede

gradbeništvo;konstrukcije;modeliranje;gubanje površine;numerični modeli;sfere z jedrom in trdim ovojem;disipacija energije;civil engineering;structures;modeling;surface wrinkling;finite element models;core-shell spheres;energy-decaying;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FGG - Fakulteta za gradbeništvo in geodezijo
UDK: 624.07:004
COBISS: 29398019 Povezava se bo odprla v novem oknu
ISSN: 0020-7462
Št. ogledov: 402
Št. prenosov: 87
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: gradbeništvo;konstrukcije;modeliranje;gubanje površine;numerični modeli;sfere z jedrom in trdim ovojem;disipacija energije;
Vrsta dela (COBISS): Znanstveno delo
Konec prepovedi (OpenAIRE): 0000-00-00
Strani: str. 1-24
Letnik: ǂLetn. ǂ127
Zvezek: ǂšt. ǂdec. - 103611
Čas izdaje: 2020
DOI: 10.1016/j.ijnonlinmec.2020.103611
ID: 12048585