Multilayered triangular and quadrilateral flat shell elements based on the Refined Zigzag Theory

2020 ◽  
Vol 233 ◽  
pp. 111629 ◽  
Author(s):  
Marco Gherlone ◽  
Daniele Versino ◽  
Vincenzo Zarra
Keyword(s):  
Shell Elements ◽  
Flat Shell ◽  
Zigzag Theory

The Effect of Explosion in a Tunnel Tube on its Damage

2018 ◽  
Vol 774 ◽  
pp. 265-270
Author(s):  
Petr P. Prochazka ◽  
Martin J. Válek
Keyword(s):  
Gas Dynamics ◽  
Solid Phase ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Structure ◽  
Air Velocity ◽  
Shell Elements ◽  
Final Volume ◽  
Flat Shell ◽  
The Impact ◽  
Geometric Compatibility

The aim of the work is to study the impact of an explosion in a tube on its damage. The theory of Landau-Liftschitz gas dynamics and the damage criterion by the Hoek-Brown in the structure are applied. If the charge is placed centrically in the tube, it is fairly easy to predict both the locations and damage levels. Therefore, the paper is oriented to the case where the charge is placed eccentrically. Air movement is described by the solution of non-linear Euler’s equations by final volume element method, while the response of the fiber reinforced concrete structure of the tube to impact waves is described by the time dependent 20-nodes flat shell elements. In order to ensure the geometric compatibility along the interface between the two media (structure, air), gas dynamics in the air is described by block elements, while the shell is approximated by the finite element. In this way, the problem solved is divided into a description of the air velocity and pressure and the velocity and stress in the solid phase, separately; interaction of the effects caused by the explosion initiated inside of the tube and its impact on the solid phase is concentrated along the interface between these two media. The calculation focuses on the early stages of interaction development when most likely damage is assumed.

Two refined non-conforming quadrilateral flat shell elements

2000 ◽  
Vol 49 (3) ◽  
pp. 355-382 ◽  
Author(s):  
Y. X. Zhang ◽  
Y. K. Cheung ◽  
W. J. Chen
Keyword(s):  
Shell Elements ◽  
Flat Shell

Heat conduction and radiative heat exchange in cellular structures using flat shell elements

2005 ◽  
Vol 22 (3) ◽  
pp. 167-180 ◽  
Author(s):  
J. B. Colliat ◽  
A. Ibrahimbegović ◽  
L. Davenne
Keyword(s):  
Heat Conduction ◽  
Heat Exchange ◽  
Radiative Heat ◽  
Cellular Structures ◽  
Radiative Heat Exchange ◽  
Shell Elements ◽  
Flat Shell

scholarly journals A New Method Applied to the Quadrilateral Membrane Element with Vertex Rigid Rotational Freedom

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Xiaowei Gao ◽  
Yunfei Liu ◽  
Jun Lv
Keyword(s):  
Shell Element ◽  
New Method ◽  
Membrane Element ◽  
Shell Elements ◽  
Local Coordinates ◽  
Flat Shell ◽  
Flat Shell Element ◽  
Cartesian Coordinate ◽  
Derivatives Of ◽  
Rotational Freedom

In order to improve the performance of the membrane element with vertex rigid rotational freedom, a new method to establish the local Cartesian coordinate system and calculate the derivatives of the shape functions with respect to the local coordinates is introduced in this paper. The membrane elements with vertex rigid rotational freedom such as GQ12 and GQ12M based on this new method can achieve higher precision results than traditional methods. The numerical results demonstrate that the elements GQ12 and GQ12M with this new method can provide better membrane elements for flat shell elements. Furthermore, this new method presented in this paper offers a new approach for other membrane elements used in flat shell element to improve the computing accuracy.

Refined triangular discrete Mindlin flat shell elements

2003 ◽  
Vol 33 (1) ◽  
pp. 52-60 ◽  
Author(s):  
G. Zengjie ◽  
C. Wanji
Keyword(s):  
Shell Elements ◽  
Flat Shell

Efficient remedy for membrane locking of 4-node flat shell elements by non-conforming modes

2003 ◽  
Vol 192 (16-18) ◽  
pp. 1961-1971 ◽  
Author(s):  
Chang-Koon Choi ◽  
Tae-Yeol Lee
Keyword(s):  
Shell Elements ◽  
Flat Shell

scholarly journals Nonlinear numerical analysis of composite slabs with steel decking

2019 ◽  
Vol 12 (5) ◽  
pp. 972-997
Author(s):  
A. R. SILVA ◽  
P. B. SILVA
Keyword(s):  
Numerical Analysis ◽  
Numerical Models ◽  
Concrete Slab ◽  
Beam Theory ◽  
Element Model ◽  
Interface Elements ◽  
Shell Elements ◽  
Composite Slabs ◽  
Flat Shell ◽  
Steel Deck

Abstract The composite slabs behavior is governed by longitudinal shear at the interface between the steel deck and concrete, which is developed in slabs under simple bending. The m-k method and the partial connection method, that are used in the evaluation of shear strength at the steel-concrete interface of composite slabs, are based on expensive and long-term experimental tests. The main objective of this work is to implement a finite element model for nonlinear numerical analysis of concrete slabs with steel decking. For this, flat shell elements are implemented, considering Reissner-Mindlin and Kirchoff plate theories, bar elements, considering the beam theory of Tymoshenko, and interface elements. In the numerical analyzes presented in the present work, the steel deck and the concrete slab, of thickness given by the total height of the slab less the height of the steel deck, are modeled with flat shell elements. The concrete rib is modeled with bar elements. The contact between steel deck and concrete is modeled through interface elements. The geometric and material nonlinearities are considered in the numerical analysis. The analyzed examples validate the numerical model suggested in this work, presenting the advantage of using a two-dimensional discretization of the problem while in comparative numerical models are uses a three-dimensional discretization of the concrete slab.

Implementation of the refined zigzag theory in shell elements with large displacements and rotations

2014 ◽  
Vol 118 ◽  
pp. 560-570 ◽  
Author(s):  
Fernando G. Flores
Keyword(s):  
Large Displacements ◽  
Shell Elements ◽  
Zigzag Theory
Sign in / Sign up

Export Citation Format

Share Document