The modal behavior of the MITC3+ triangular shell element

2015 ◽  
Vol 153 ◽  
pp. 148-164 ◽  
Author(s):  
Youngyu Lee ◽  
Hyeong-Min Jeon ◽  
Phill-Seung Lee ◽  
Klaus-Jürgen Bathe
Keyword(s):  
Shell Element ◽  
Triangular Shell Element ◽  
Modal Behavior

Triangular Shell Element for Large Rotations Analysis

AIAA Journal ◽  
2003 ◽  
Vol 41 (12) ◽  
pp. 2505-2508 ◽  
Author(s):  
R. Levy ◽  
E. Gal
Keyword(s):  
Shell Element ◽  
Triangular Shell Element ◽  
Large Rotations

Control Effectiveness of Segmented Actuators Laminated on Ring-Shells

1997 ◽  
Author(s):  
R. Ye ◽  
H. Bahrami ◽  
H. S. Tzou
Keyword(s):  
Finite Element ◽  
Distributed Control ◽  
Piezoelectric Actuators ◽  
Shell Element ◽  
Circular Ring ◽  
Control Effectiveness ◽  
Triangular Shell Element ◽  
Circular Ring Shell ◽  
System Equations ◽  
Ring Shell

Abstract Distributed control effectiveness of ring-shells laminated with segmented actuators is investigated in this paper. A new laminated quadratic piezoelastic triangular shell FE is developed using the layerwise constant shear angle theory. Element and system equations are also derived. The developed piezoelastic triangular shell element is used to model a semi-circular ring shell with various segments of distributed piezoelectric actuators. Finite element (triangular shell FE) solutions are compared with the theoretical, experimental, and finite element first. Natural frequencies and distributed control effects of the ring shell with different length of piezoelectric actuators are also studied. Control effectiveness is evaluated and optimal length of the actuator is recommended.

Elastic Analysis of a Skull

1973 ◽  
Vol 40 (4) ◽  
pp. 838-842 ◽  
Author(s):  
C. H. Hardy ◽  
P. V. Marcal
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Elastic Stress ◽  
Shell Element ◽  
Elastic Analysis ◽  
Triangular Shell Element ◽  
Skull Measurements ◽  
Doubly Curved

A finite-element elastic analysis is made of a skull. Measurements were made of the geometry and thickness of a skull. The skull was then idealized with a doubly curved and arbitrary triangular shell element. Results suggest that the skull is well built for resistance to front loads. The importance of using a composite material through the thickness of the shell was established. On the basis of tensile cracking at maximum elastic stress, loads of 3500 lb and 1400 lb were predicted for the first cracking of the skull due to front and side loading, respectively.

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