Pregled bibliografske jedinice broj: 591993
On the numerical behavior of the MLPG mixed approach in structural analysis
On the numerical behavior of the MLPG mixed approach in structural analysis // Book of Abstracts of ICCES MM 2012 / Atluri, S.N. ; Vušanović, I. ; Šarler, B. (ur.).
Podgorica: University of Monte Negro, 2012. str. 15-15 (pozvano predavanje, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 591993 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
On the numerical behavior of the MLPG mixed approach in structural analysis
Autori
Jarak, Tomislav ; Sorić, Jurica
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Book of Abstracts of ICCES MM 2012
/ Atluri, S.N. ; Vušanović, I. ; Šarler, B. - Podgorica : University of Monte Negro, 2012, 15-15
ISBN
978-9940-527-25-9
Skup
ICCES MM 2012: ICCES Special symposium on Meshless & Other Novel Computational Methods
Mjesto i datum
Budva, Crna Gora, 02.09.2012. - 06.09.2012
Vrsta sudjelovanja
Pozvano predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
mixed MLPG method; structural analysis; accuracy; stability; locking
Sažetak
Although the mixed Meshless Local Petrov-Galerkin (MLPG) methods do not have to satisfy Ladyzhenskaja-Babuška-Brezzi (LBB) conditions to achieve stability, spurious oscillations in displacement and strain fields have sometimes been observed. In order to reveal the causes of such behavior, mixed formulations for 2-D linear elasticity will be considered in this contribution, whereby special attention will be dedicated to the stability and accuracy of solution. Various approximations techniques for the strains will be proposed, which could serve as a remedy for the alleviation of the above mentioned problems. These include using different sets of field nodes for the approximation of strains and displacements, and the imposition of compatibility conditions between the approximated strains and displacements at the strain field nodes via a collocation method. Alternatively, a strain smoothing technique will be proposed. The local weak form (LWF) of 2-D equilibrium equations will be derived over rectangular local sub-domains surrounding the nodes used for the approximation of displacements. The interpolating Moving Least Squares (MLS) technique will be applied, which allows a simple imposition of essential BCs, like in FEM. The performance of the presented algorithms will be demonstrated by numerical examples.
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
