- Type of paper
: Paper in proceedings
Title: Isotropic plate and shell analysis under projectile impact
- Authors:
- KOŽAR, IVICA (146206)
- Editors
- Kos, Zorko
- Kos, Zorko
Proceedings title: Zbornik radova IX
Language: hrvatski
Place: Rijeka
Year: 1992
Pages: from 101 to 113
Summary: Paper describes development of a numerical model for
laminated plate analysis under impact load. Parabolic serendipity shell
elements are imployed toghether with elasto-plastic materijal model and
Newmark time integration scheeme. Numerical results are compared with
published experimental resultas and a good agreement has been established.
Keywords: laminated plates, shells, impact load, numerical analysis
- Type of paper
: Paper in proceedings
Title: New Finite-Rotation Solid Element
- Authors:
- KOŽAR, IVICA (146206)
- Ibrahimbegović, Adnan
- Editors
- Sorić, Jurica
- Vranković, Nikola
Proceedings title: Zbornik radova I.kongresa Hrvatskog društva za mehaniku
Language: engleski
Place: Pula
Year: 1994
ISBN/ISSN: 953-96243-0-4
Pages: from 7 to 14
Meeting: I. kongres Hrvatskog društva za mehaniku
Held: from 09/14/94 to 09/17/94
Summary: The paper describes development of an 8 node solid finite
element capable of undergoing both large displacements and large rotations.
Constitutive law chosen is for elastic materials.
Element is based on a sound variational basis and consistent linearization
is performed so that quadratic convergence rate is obtained (as it is
visible from examples).
Incompatible modes introduced by Wilson et al. in 1973 are employed to
produce 'locking' free performance.
Ibrahimbegović and Wilson Š1991Ć modified the method so that
the constant strain condition ('patch-test') is satisfied.
Further improvement regarding incompatible modes is use of operator split
technique that makes possible separate solution of equilibrium equations
which in turn drastically reduces demands for secondary storage.
Solid element developed in this article includes treatment of finite
rotations and can undergo large displacements as well as large rotations.
Rotation vector is chosen as a parameterization of large rotations and as a
consequence stiffness matrix is symmetric. Also, rotation vector is
expressed in a unique way so that it can be additively composed and the
update procedure is the simplest
one possible and without need for secondary storage.
Interpolation functions are introduced at the very end of the work so that
description is as element type independent as possible.
Correctness of the procedure is proved with a set of numerical examples.
Keywords: nonlinear analysis, large rotations, solid finite element
- Type of paper
: Paper in proceedings
Title: Curved Orthotropic Plate Analysis on Bridge Example
- Authors:
- KOŽAR, IVICA (146206)
- Editors
- Radić, Jure
Proceedings title: Graditelji u obnovi Hrvatske
Language: engleski
Place: Brijuni, Hrvatska
Year: 1992
Pages: from 171 to 182
Meeting: Graditelji u obnovi Hrvatske
Held: from 06/25/92 to 06/27/92
Summary: Paper describes anisotropic numerical analysis of curved
bridge decks. The developed method is based on isoparametric serendipity
elements and self-developed out of core block solver. Comparasions are made
with some other finite element codes (ex. SAP80) and with the measurement's
results. It has been noticed that the authors method has advantages over
other procedures.
Keywords: othotropic plates, finite elements, bridges
