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.

scholarly journals A 6-parameter triangular flat shell element for nonlinear analysis

2019 ◽  
pp. 237-268 ◽  
Author(s):  
Professor Mohammad Rezaiee-Pajand ◽  
Amir R. Masoodi ◽  
E. Arabi
Keyword(s):  
Degrees Of Freedom ◽  
Shell Element ◽  
Geometrically Nonlinear ◽  
Nonlinear Analyses ◽  
Six Degrees Of Freedom ◽  
Triangular Shell Element ◽  
Rotation Method ◽  
Flat Shell Element ◽  
Rotational Degrees Of Freedom ◽  
Convergence Study

In this paper, an improved flat triangular shell element is proposed. This element has three nodes, and in each node, six degrees of freedom are considered. Since there are three rotational degrees of freedom at each node, the drilling effect can be incorporated in authors' formulation. A new procedure is also suggested for updating the director vectors about which the rotational degrees of freedom are defined. In order to study large displacements and rotations, Total Lagrangian principles are employed. In addition, updating the rotational degrees of freedom is implemented using enriched updated director vectors, which are formulated based on the finite rotation method. On the other hand, small strains are considered in this formulation. By utilizing MITC method, shear and membrane locking is mitigated from new element. To examine the performance, the element passes three basic tests, including isotropy, and patch test. Moreover, a convergence study is also implemented to show the elemental behavior. Several popular benchmarks are considered to illustrate the accuracy and capability of the suggested element in geometrically nonlinear analyses.    

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