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

Abstract

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.

Keywords

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;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
UDC: 624.07:004
COBISS: 29398019 Link will open in a new window
ISSN: 0020-7462
Views: 402
Downloads: 87
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: gradbeništvo;konstrukcije;modeliranje;gubanje površine;numerični modeli;sfere z jedrom in trdim ovojem;disipacija energije;
Type (COBISS): Scientific work
Embargo end date (OpenAIRE): 0000-00-00
Pages: str. 1-24
Volume: ǂLetn. ǂ127
Issue: ǂšt. ǂdec. - 103611
Chronology: 2020
DOI: 10.1016/j.ijnonlinmec.2020.103611
ID: 12048585