Pregled bibliografske jedinice broj: 481677
On an efficient MLPG formulation for shell analysis
On an efficient MLPG formulation for shell analysis // Book of Abstracts of the ICCES MM 2010 / Paik, J.K., Atluri, S.N. (ur.).
Busan: Pusan National University, 2010. str. 24-24 (pozvano predavanje, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 481677 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
On an efficient MLPG formulation for shell analysis
Autori
Jarak, Tomislav ; Sorić, Jurica
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Book of Abstracts of the ICCES MM 2010
/ Paik, J.K., Atluri, S.N. - Busan : Pusan National University, 2010, 24-24
Skup
ICCES Special Symposium on Meshless Methods : ICCES MM 2010
Mjesto i datum
Busan, Republika Koreja, 17.08.2010. - 21.08.2010
Vrsta sudjelovanja
Pozvano predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
MLPG method; shells; 3-D solid; mixed formulation; MLS
Sažetak
A meshless formulation based on the local Petrov- Galerkin approach is developed for analysis of shell structures. A 3-D solid concept usually used in the finite element formulations is adopted, and the exact shell geometry may be described. The shell continuum is discretized in the parametric space defined in the normalized coordinates by the nodes located on the upper and lower surfaces, and it is than mapped into the global Cartesian coordinates. According to the Petrov-Galerkin approach, the local weak form of the 3-D equilibrium equations is derived over both the cylindrical and the prismatic local sub-domains surrounding the couple of nodes positioned on the opposite surfaces in the parametric space. The mixed approach using the strain and the transversal stress interpolations is applied. The interpolation in the in-plane directions is performed by the modified moving least squares functions obeying Kronecker delta property with a high accuracy, while the linear polynomial functions are used for the approximation over the shell thickness. In order to derive a closed system of the global discretized equations with the displacements as unknown variables, the nodal strain and stress values are replaced by the displacement components using the independent displacement interpolation. The results obtained by means of the integration over the cylindrical and the prismatic local subdomains are compared one another. The superiority of the formulation using the prismatic integration domain is demonstrated, in which more stable solutions and monotonic convergence are exhibited. All undesired locking phenomena are suppressed by both approaches.
Izvorni jezik
Engleski
Znanstvena područja
Strojarstvo
POVEZANOST RADA
Projekti:
120-1201910-1812 - Numeričko modeliranje procesa deformiranja bioloških tkiva (Sorić, Jurica, MZOS ) ( CroRIS)
120-1201910-1906 - Modeliranje oštećenja i sigurnost konstrukcija (Tonković, Zdenko, MZOS ) ( CroRIS)
Ustanove:
Fakultet strojarstva i brodogradnje, Zagreb
