Shell finite element models with local kinematic refinements based on Reissner’s Mixed Variational Theorem with layer-wise descriptions

2020 ◽  
Vol 250 ◽  
pp. 112587
Author(s):  
G. Li ◽  
E. Carrera
Keyword(s):  
Finite Element ◽  
Finite Element Models ◽  
Variational Theorem ◽  
Reissner’S Mixed Variational Theorem ◽  
Shell Finite Element

Fast and accurate specimen-specific simulation of trabecular bone elastic modulus using novel beam–shell finite element models

2011 ◽  
Vol 44 (8) ◽  
pp. 1566-1572 ◽  
Author(s):  
Jef Vanderoost ◽  
Siegfried V.N. Jaecques ◽  
Georges Van der Perre ◽  
Steven Boonen ◽  
Jan D'hooge ◽  
...  
Keyword(s):  
Finite Element ◽  
Elastic Modulus ◽  
Trabecular Bone ◽  
Finite Element Models ◽  
Shell Finite Element ◽  
Bone Elastic Modulus

Errors in shell finite element models for the vibration of circular cylinders

1975 ◽  
Vol 43 (3) ◽  
pp. 511-528
Author(s):  
G.M.L. Gladwell ◽  
D.K. Vijay
Keyword(s):  
Finite Element ◽  
Circular Cylinders ◽  
Finite Element Models ◽  
Shell Finite Element

INFLUENCE OF INCLINED STIFFENERS IN I-BEAM CONNECTIONS ON BIMOMENT TRANSFERRING

2021 ◽  
Vol 95 (3) ◽  
pp. 47-58
Author(s):  
I.N. SERPIK ◽  
◽  
R.O. SHKOLYARENKO ◽  
Keyword(s):  
Finite Element ◽  
Point Of View ◽  
Frame Structures ◽  
Engineering Practice ◽  
Finite Element Models ◽  
Free Theory ◽  
Scientific Papers ◽  
Thin Walled ◽  
Shell Finite Element ◽  
Finite Element Schemes

Shear-free theory of V.Z. Vlasov remains one of the most reasonable approaches to calculating thin-walled bars taking into account constrained torsion. At the same time, the use of this theory for the analysis of deformations of frame structures still requires research in terms of the conditions for transferring forces in bar connections. As noted in some scientific papers, the balance of bimoments can be significantly broken at the joints of thin-walled bars of an open profile in some designs. This paper deals with this phenomenon for steel I-beam profiles, associated with the presence of inclined stiffeners in joint units. Using shell finite element models, the influence of inclined stiffeners on the appearance of bimoment jumps at the pairwise connection of bars is shown. A dependence is derived that makes it possible to take into account the stiffness of the inclined edge in the bar models from the point of view of the restraint of cross-section warping. On the basis of numerical experiments, it was determined that the introduction of such stiffness into the bar finite element schemes of frame structures allows to reflect the condition of bars interaction in the transferring of bimoments with a sufficiently high accuracy for engineering practice.

Non-linear rotation-free shell finite-element models for aortic heart valves

2017 ◽  
Vol 50 ◽  
pp. 56-62 ◽  
Author(s):  
Anvar Gilmanov ◽  
Henryk Stolarski ◽  
Fotis Sotiropoulos
Keyword(s):  
Finite Element ◽  
Heart Valves ◽  
Finite Element Models ◽  
Non Linear ◽  
Shell Finite Element

Research on the Influence of the Stiffening Plates on the Stress of Hold Hoop of Bent Cap

2019 ◽  
Vol 815 ◽  
pp. 223-228
Author(s):  
Qin Tian ◽  
Cheng Hao Hang ◽  
Yun Peng Zou ◽  
Zi Xin Wan
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Stress Concentration ◽  
Structural Parameters ◽  
Great Influence ◽  
Finite Element Models ◽  
Finite Element Software ◽  
Bridge Steel ◽  
Calculation Results ◽  
Shell Finite Element

In order to improve the mechanical behaviour of bridge steel hoops, the plate shell finite element models of several steel hoops were established by using the general finite element software ABAQUS. Through changing the structural parameters of the stiffening plates, the influence of the stiffening plates on the mechanical properties of the steel hoops was explored. The calculation results show that the stress distribution at both ends of the steel hoop is uneven and there is a phenomenon of stress concentration. The spacing of stiffening plates has great influence on the mechanical properties of steel hoop. Some measures to improve the mechanical properties of steel hoop are given.

scholarly journals Simple and extensible plate and shell finite element models through automatic code generation tools

2018 ◽  
Vol 209 ◽  
pp. 163-181 ◽  
Author(s):  
Jack S. Hale ◽  
Matteo Brunetti ◽  
Stéphane P.A. Bordas ◽  
Corrado Maurini
Keyword(s):  
Finite Element ◽  
Code Generation ◽  
Automatic Code Generation ◽  
Finite Element Models ◽  
Plate And Shell ◽  
Shell Finite Element ◽  
Automatic Code

Evaluating the Effect of Nozzle Weld Stiffness When Using Shell Finite Element Models for ASME Code Evaluations

2012 ◽  
Author(s):  
Bryan Dunlap ◽  
Hassan Ziada ◽  
John Julyk
Keyword(s):  
Finite Element ◽  
Finite Elements ◽  
Shell Element ◽  
Finite Element Models ◽  
Shell Elements ◽  
Asme Code ◽  
Section Viii ◽  
Shell Finite Element ◽  
Code Compliance ◽  
Division 2

Typically the use of SHELL finite elements to model nozzle/vessel interfaces will not include details of the weld at the interface. The omission of the weld details from SHELL element models is due to the difficulty in implementing such details and the assumption that additional interface stiffness due to the weld will have a negligible effect on results at locations of interest for Code evaluation. This study will demonstrate a proposed method for modeling weld details with SHELL elements and then evaluate the magnitude of the weld stiffness effect on results and Code compliance. The method of modeling the weld details with SHELL elements used in this study will follow the guidance provided by ASME BPVC Section VIII, Division 2, Annex 5.A [2] for such interfaces. Models of nozzle/vessel interfaces will be shown comparing results of SOLID element models with and without the weld detail, and then SHELL element models both with and without the weld detail. The results from these models will be evaluated and recommendations for future modeling and evaluation of nozzle/shell interfaces with SHELL elements will be offered.

Elastoplastic analysis of thin-walled bars in the context of Generalised Beam Theory

2019 ◽  
Author(s):  
Miguel Abambres ◽  
Dinar Camotim ◽  
Nuno Silvestre
Keyword(s):  
Finite Element ◽  
Beam Theory ◽  
Finite Element Models ◽  
Inelastic Analysis ◽  
Arbitrary Loading ◽  
Steel Bars ◽  
Thin Walled ◽  
Shell Finite Element ◽  
Global Deformation ◽  
Generalised Beam Theory

A formulation of the Generalised Beam Theory (GBT) is presented for the 1st order inelastic analysis of thin-walled steel bars subjected to arbitrary loading and boundary conditions. Five illustrative examples are shown to validate the theory for cases involving global deformation only, namely uniform bending, non-uniform bending, combined bending and axial compression, and non-uniform torsion. Lastly, the results are validated against ABAQUS using beam and shell finite element models. The correlation is typically great concerning equilibrium paths, deformed configurations, and stress diagrams. In those cases where results do not compare so well, possible causes are pointed out.

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