scholarly journals Finite element analysis of large deformations of hyperelastic solids in principal axes

2009 ◽  
Vol 2 (1) ◽  
pp. 19-37 ◽  
Author(s):  
A.I. Golovanov
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformations ◽  
Element Analysis ◽  
Principal Axes

scholarly journals Vertical Stiffness Functions of Rigid Skirted Caissons Supporting Offshore Wind Turbines

2021 ◽  
Vol 9 (6) ◽  
pp. 573
Author(s):  
AbdelRahman Salem ◽  
Saleh Jalbi ◽  
Subhamoy Bhattacharya
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Offshore Wind ◽  
Element Analysis ◽  
Vertical Stiffness ◽  
Closed Form Solutions ◽  
Principal Axes ◽  
Modes Of Vibration ◽  
Bending Modes ◽  
Tower Vibration

Suction Bucket Jackets (SBJs) need to be fundamentally designed to avoid rocking modes of vibration about the principal axes of the set of foundations and engineered towards sway-bending modes of tower vibration. Whether or not such type of jackets exhibit rocking modes depends on the vertical stiffness of the caissons supporting them. This paper therefore derives closed form solutions for vertical stiffness in three types of ground profiles: linear, homogenous, and parabolic. The expressions are applicable to suction caissons having an aspect ratio (depth: diameter) between 0.2 and 2 (i.e., 0.2 < L/D < 2). The work is based on finite element analysis followed by non-linear regression. The derived expressions are then validated and verified using studies available in literature. Finally, an example problem is taken to demonstrate the application of the methodology whereby fundamental natural frequency of SBJ can be obtained. These formulae can be used for preliminary design and can also be used to verify rigorous finite element analysis during detailed design.

Finite Element Analysis of the Crimping Process of the Piston-slipper Component in Hydraulic Pumps

1999 ◽  
Vol 122 (3) ◽  
pp. 337-342 ◽  
Author(s):  
Y. Yao ◽  
A. Z. Qamhiyah ◽  
X. D. Fang
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformations ◽  
Manufacturing Processes ◽  
Hydraulic Pump ◽  
Element Analysis ◽  
Die Geometry ◽  
Simulation Procedure ◽  
Finite Element Package

Hydraulic pumps and motors are widely used in mobile equipment for construction, mining and agriculture. The piston-slipper component is one of the critical parts of a hydraulic pump. A crimping process is used for connecting the piston to the slipper component. Like most of the manufacturing processes that involve large deformations, high stresses are created in the slipper and piston during the crimping process. This paper presents a finite element method for the analysis of the stresses, strains, and forces associated with the crimping process. This method can be used in the optimization of the piston, slipper and die designs. The commercial finite element package ANSYS was used to simulate the crimping process. The simulation procedure is used to obtain a better understanding of the effect of the die geometry on the crimping process. [S1050-0472(00)00303-2]

scholarly journals Rail Vehicle Cab Car Collision and Corner Post Designs According to APTA S-034 Requirements

2003 ◽  
Author(s):  
Ronald A. Mayville ◽  
Kent N. Johnson ◽  
David C. Tyrell ◽  
Richard G. Stringfellow
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformation ◽  
North American ◽  
Public Transportation ◽  
Large Deformations ◽  
Deformation Capacity ◽  
Element Analysis ◽  
Rail Vehicle ◽  
The Past

The American Public Transportation Association standard for rail passenger equipment, S-034, includes requirements for the collision and corner posts of cab cars that are consistent with new federal requirements and substantially different than what has been required in the past. This paper describes the development and evaluation of two cab car end frame designs that were generated to investigate the implications on crashworthiness and operations of the new standards. A review was undertaken of prior cab car crashworthiness research and of existing and planned cab car designs for North American operation. The two designs were then generated and both hand and finite element analysis, including analysis for large deformations, was conducted to demonstrate that the designs meet the requirements. Of particular interest is the issue of providing large deformation capacity of the posts and the implications of eliminating the stairwell to meet the strength requirements.

Finite Element Analysis of Elastomers Using ANSYS

2012 ◽  
Author(s):  
Manoj Kunnil ◽  
David Yamarthi ◽  
Santhosh K. Kompally
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Material Characterization ◽  
Vibration Isolation ◽  
Large Deformations ◽  
Elastic Solids ◽  
Element Analysis ◽  
Linear Elastic ◽  
Elastomeric Materials ◽  
Isolation Systems

Elastomeric materials have a capability to withstand large deformations and still be able to fully recover their original dimensions. Natural and synthetic elastomers and their derivatives can reach strains as high as 500–1000%. Engineering materials, such as crystalline metals are classified as linear elastic solids, whereas elastomeric materials are considered as nonlinear elastic solids. Elastomers present a very complicated mechanical behavior that exceed the linear elastic theory and contain large deformations, plastic and viscoelastic properties. Finite element (FE) is a powerful tool to analyze such elastomers. Design of elastomeric systems in an industrial scenario generally requires (i) reliability and (ii) a minimum cycle time. This paper starts with a review of the hyperelastic theory, followed by a detailed discussion on the process involved in the material characterization of hyperelastic material like DuPont™ Viton® fluoroelastomer and polyacrylic elastomer in industrial application point of view. The paper also discusses guidelines to be followed in the various stages of material characterization such as testing, sampling and finite element simulation. Numerical stability issues associated with elastomeric modeling in finite element context and a set of guidelines to be followed in finite element analysis of elastomers are illustrated through a DuPont™ Viton® fluoroelastomer and polyacrylic elastomer pad vibration isolation systems. The above technique has been applied for designing vibration isolation systems for generators.

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