Nonlinear Flutter Calculations Using Finite Elements in a Direct Eulerian-Lagrangian Formulation

AIAA Journal ◽  
2008 ◽  
Vol 46 (6) ◽  
pp. 1331-1341 ◽  
Author(s):  
Guclu Seber ◽  
Oddvar O. Bendiksen
Keyword(s):  
Finite Elements ◽  
Lagrangian Formulation ◽  
Nonlinear Flutter

Nonlinear Flutter of Composite Panels Under Yawed Supersonic Flow Using Finite Elements

AIAA Journal ◽  
10.2514/2.818 ◽  
1999 ◽  
Vol 37 (9) ◽  
pp. 1025-1032 ◽  
Author(s):  
K. Abdel-Motaglay ◽  
R. Chen ◽  
C. Mei
Keyword(s):  
Supersonic Flow ◽  
Finite Elements ◽  
Composite Panels ◽  
Nonlinear Flutter

Nonlinear flutter of composite panels under yawed supersonic flow using finite elements

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 1025-1032
Author(s):  
K. Abdel-Motaglay ◽  
R. Chen ◽  
C. Mei
Keyword(s):  
Supersonic Flow ◽  
Finite Elements ◽  
Composite Panels ◽  
Nonlinear Flutter

scholarly journals UPDATED LAGRANGIAN FORMULATION FOR CORRECTED SMOOTH PARTICLE HYDRODYNAMICS

2006 ◽  
Vol 03 (04) ◽  
pp. 383-399 ◽  
Author(s):  
ANTONIO HUERTA ◽  
YOLANDA VIDAL ◽  
JAVIER BONET
Keyword(s):  
Finite Elements ◽  
Lagrangian Formulation ◽  
Smooth Particle Hydrodynamics ◽  
Improved Method ◽  
Zero Energy ◽  
Particle Hydrodynamics ◽  
Large Distortion ◽  
Updated Lagrangian Formulation ◽  
Updated Lagrangian ◽  
Stabilization Technique

Smooth Particle Hydrodynamics (SPH) are, in general, more robust than finite elements for large distortion problems. Nevertheless, updating the reference configuration may be necessary in some problems involving extremely large distortions. If a standard updated formulation is implemented in SPH zero energy modes are activated and spoil the solution. It is important to note that the updated Lagrangian does not present tension instability but only zero energy modes. Here an stabilization technique is incorporated to the updated formulation to obtain an improved method without mechanisms.

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