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Avtorstvo: Boštjan BRANK // 1.08 Objavljeno predavanje na znanstveni konferenci
Leto: 2002
Citat: BRANK, Boštjan, KORELC, Jože, IBRAHIMBEGOVIĆ, Adnan. Shell formulations with through-the-thickness stretching. V: MANG, H. A. (ur.), RAMMERSTORFER, F. G. (ur.), EBERHARDSTEINER, J. (ur.). Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria. Vienna, 2002: University of technology, Institute for strenght of materials, Institute for lightweight structures and aerospace engineering, str. 1-10, graf. prikazi.
Povzetek: In this paper we discuss a nonlinear shell model accounting for through-the-thickness stretching and direct use of 3d constituive equations. In such formulation the normal strain in the thickness direction should be varying at least lineary through the thickness. This can be achieved either by assuming a quadratic distribution of displacements through the shell thickness, which leads to a 7-parameter shell model, or by enriching the through-the-thickness strain of conventional shell model by using enhanced assumed strain method or incompatible models method, which lead to a 6-parameter model. In this work we focus on two questions. First we study a difference between a 7-parameter model (with 3 displacements of the mid-surface, 2 additively updated rotations of the shell director and 2 through-the-thickness parameters) with exact expression for the Green-Lagrangestrains and a 7-parameter model where usual simplifications are carried out by neglecting certain terms. The former of these two models can be developed without difficulty mainly by using the symbolic manipulation. [COBISS.SI-ID 1684065]
Tipologija: 1.08 Objavljeno predavanje na znanstveni konferenci
COBISS ID 1684065 Polni zapis iz sistema COBISS
Vpisal 2009/06/10 11:56