Naslov
Damage modeling using strain gradient based finite element formulation

Autori
Putar, Filip ; Sorić, Jurica ; Lesičar, Tomislav ; Tonković, Zdenko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
ECCOMAS Congress 2016 : Proceedings (e-book). Vol. 4 / Papadrakakis, M. ; Papadopoulos, V. ; Stefanou, G. ; Plevris, V. - Atena : Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens (NTUA), Greece, 2016, 6711-6720

ISBN
978-618-82844-0-1

Skup
ECCOMAS Congress

Mjesto i datum
Hersonissos, Grčka, 05.06.2016. - 10.06.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Damage, Softening, C1 Continuity Finite Element, Strain Gradient Theory, Heterogeneous Material

Sažetak
The present study deals with the modeling of quasi-brittle softening phenomena using the two dimensional C1 continuity triangular finite element. The formulation of damage model is based on an isotropic damage law applied to the higher-order stress-strain constitutive relations originating from the full strain gradient theory. Both homogeneous and heterogeneous materials are considered by employing the second-order homogenization procedure to obtain the required constitutive matrices. For this purpose, two different heterogeneous representative volume elements are employed, where the results of the softening analyses are compared with those obtained for the corresponding homogeneous materials with equivalent internal length scales. The derived finite element formulation is implemented into the finite element program ABAQUS using user subroutines. Finally, accuracy and efficiency of the proposed higher-order gradient model are demonstrated by the modeling of a stretched plate weakened in the middle, usually used as a benchmark in strain softening analyses.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA