scholarly journals Application of Low-Cost Sensors for the Development of a Methodology to Design Front-End Loaders for Tractors

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
H. Malon ◽  
A. Ayuda ◽  
F. J. Garcia-Ramos ◽  
M. Vidal ◽  
J. Cuartero
Keyword(s):  
Finite Element Method ◽  
Low Cost ◽  
Strain Gauges ◽  
Second Phase ◽  
The Finite Element Method ◽  
Structural Behaviour ◽  
Experimental Phase ◽  
Front End ◽  
Accurate Design ◽  
Two Phases

Tractor front-end loaders are an essential part of the equipment used on farms. At present, there are an important number of small- and medium-sized companies involved in the manufacturing of this equipment. These companies rely heavily on experience for innovative designs, as in the vast majority of cases they lack access to adequate methodology for the optimal design of new front-end loaders. The study conducted has developed a methodology to design tractor front-end loaders with a view of obtaining their accurate design during the bucket loading process. The methodology comprises two phases: the first phase involves a numerical analysis of the structural behaviour of the front-end loader components by means of the Finite Element Method; the second phase, the experimental phase, makes use of low-cost sensors, in particular, strain gauges, to analyse existing strains at selected points in the front-end loader structure. The experimental results obtained by means of low-cost sensors fitted onto the front-end loader allow analysing the existing strains at the points measured, as well as validate the numerical model developed. This methodology is validated by applying it to a commercial front-end loader, more specifically to model 430E2 of the company Maquinaria Agrícola El León S.A (Spain).

An Overview of the Finite Element Method on the Tool-Soil Interacting Problem of Tillage

2014 ◽  
Vol 707 ◽  
pp. 397-400 ◽  
Author(s):  
Xiao Hong Liu ◽  
Yan Yu ◽  
Li Chun Qiu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Computer Aided Design ◽  
High Efficiency ◽  
Low Cost ◽  
Dynamic Effect ◽  
Research Progress ◽  
The Finite Element Method ◽  
Displacement Fields ◽  
Element Method

This article introduced the up-to-date research progress on the tool-soil interacting problem of tillage; and investigated the situation of constitutive relation usage in the finite element method (FEM). A review including the dynamic effect on the performance of tillage operation with FEM has been conducted. It showed that the virtual reality method with FEM had made much progress in evaluating the tool draft, distribution position of stress and strain, displacement fields and acceleration in soil-tool interactions, soft ware package of computer aided design of tillage tools; it will be a low cost and high efficiency assistive tool in the development procedure of tillage tools, and can be applied to study and analyze the performance of resulting prototypes.

scholarly journals Clinical Simulation in pediatrics and neonatology using EDISON: an educational innovation project

2021 ◽  
Author(s):  
José María Blasco ◽  
Evelin Balaguer-López ◽  
Pablo García-Molina ◽  
Enrique Sanchis-Sánchez ◽  
Pablo Buck-Sainz-Rozas ◽  
...  
Keyword(s):  
Educational Innovation ◽  
Training Intervention ◽  
Second Phase ◽  
Experimental Phase ◽  
Clinical Simulation ◽  
Safe Spaces ◽  
Innovation Project ◽  
Quasi Experimental ◽  
Two Phases ◽  
The One

Introduction: Clinical simulation is a tool that allows creating controlled and safe spaces that mimic reality, where students can acquire skills and abilities prior to facing real situations. Methodology: This is a study with two phases. The first quasi-experimental phase where 3 questionnaires were used; two of them to assess knowledge (pretest - posttest) and the other one to assess the satisfaction of the training action. And the second phase was analytical, where the effectiveness of a training intervention in a confinement context based on the use of audiovisual materials created through EDISON was evaluated. Results: In 2019 the average satisfaction of the students was 9.22 (SD 0.72) out of 10. The most valued item was the one related to the domain that the instructors had regarding the knowledge imparted, with 9.79 out of 10. The students' knowledge improved in 9 of the 11 questions. Conclusions: The satisfaction of the students and the knowledge acquired were remarkable, being clinical simulation a methodology that helps to consolidate the knowledge and skills put into practice.

Durability Evaluations of the Car Body for Rubber-Tired Light Rail Vehicles

2006 ◽  
Vol 321-323 ◽  
pp. 1487-1490
Author(s):  
Yeon Su Kim ◽  
Rag Gyo Jeong ◽  
Tae Kon Lim ◽  
Won Ju Hwang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Experimental Results ◽  
Strain Gauges ◽  
Light Rail ◽  
The Finite Element Method ◽  
Dynamic Stresses ◽  
Test Track ◽  
Car Body ◽  
Rail Vehicles

This study was aimed at evaluating the durability of the car body for rubber-tired light rail vehicles according to Korean-standardized specifications for light rail vehicles (size, strength, structure, weight, etc.). The strengths of the car body were analyzed under two weight conditions (tare weight and maximum passenger weight) by using the finite element method. Based on the results of the analysis, dynamic stresses were measured by using strain gauges, including rosette gauges, while the train was running on the test track. Various experimental results have verified the durability and safety of the car body.

Analysis of Front End Bending in Plate Rolling by The Finite Element Method

1997 ◽  
Vol 119 (3) ◽  
pp. 314-323 ◽  
Author(s):  
B. H. Park ◽  
S. M. Hwang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Empirical Model ◽  
The Finite Element Method ◽  
Roll Speed ◽  
Speed Difference ◽  
Front End ◽  
Plate Rolling ◽  
Element Simulation

This paper deals with the problem of the front end bending arising in plate rolling. The problem, which is caused by unbalanced rolling, is investigated by the finite element simulation technique. Discussions are made on the effect of various unbalanced rolling conditions on the deformation of the front end. In particular, an empirical model is developed for the prediction of the curvature of the front end rolled under the presence of the roll speed difference.

scholarly journals Analysis of beams on elastic foundations using Green's functions

2021 ◽  
Vol 37 (2) ◽  
Author(s):  
J. Molina-Villegas ◽  
J. Ortega ◽  
A. Toro
Keyword(s):  
Finite Element Method ◽  
Elastic Foundation ◽  
Low Cost ◽  
Retaining Walls ◽  
Complex Structures ◽  
The Finite Element Method ◽  
Elastic Foundations ◽  
Stiffness Method ◽  
Model Foundation ◽  
Beams On Elastic Foundation

Beams on elastic foundation are basic elements within structural analysis, which are used to model foundation beams, foundation piles, retaining walls, and more complex structures that include some of these elements. For their analysis, the finite element method is usually used [1], which produces an approximate solution of the problem; and the Green's function stiffness method [2], which produces an exact solution. This article presents a methodology 100% based on the use of Green function's (response to a unit point force), to obtain the exact response of beams on elastic foundation. The main advantage of this formulation is its computational low cost compared to the aforementioned alternatives, and even for a large number of problems, it can be expressed only by means of sums and integrals, which can be easily performed numerically. Also, a great variety of Green function's for finite and infinite beams on elastic foundations with different boundary conditions are also presented, as well as some examples with the implementation of the proposed methodology.

scholarly journals Multimodeling of multi-alterated structures in the Arlequin framework

2008 ◽  
pp. 969-980
Author(s):  
Hachmi Ben Dhia ◽  
Nadia Elkhodja ◽  
François-Xavier Roux
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Simple Structure ◽  
Low Cost ◽  
Numerical Results ◽  
Complex Structures ◽  
The Finite Element Method ◽  
Low Costs ◽  
Element Method

The goal of this work is the development of a numerical methodology for flexible and low-cost computation and/or design of complex structures that might have been obtained by a multialteration of a sound simple structure. The multimodel Arlequin framework is herein used to meet the flexibility and low-costs requirements. A preconditioned FETI-like solver is adapted to the solution of the discrete mixed Arlequin problems obtained by using the Finite Element Method. Enlightening numerical results are given.

scholarly journals Theoretical Modeling of Piezoelectric Cantilever MEMS Loudspeakers

2021 ◽  
Vol 11 (14) ◽  
pp. 6323
Author(s):  
Wei Liu ◽  
Jie Huang ◽  
Yong Shen ◽  
Jiazheng Cheng
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Equivalent Circuit ◽  
Sound Pressure ◽  
Low Cost ◽  
The Finite Element Method ◽  
Microelectromechanical System ◽  
Piezoelectric Cantilever ◽  
Equivalent Circuit Method ◽  
Electromechanical Conversion

Piezoelectric microelectromechanical system (MEMS) loudspeakers have received extensive attention in recent years. In particular, the piezoelectric cantilever MEMS loudspeaker, which uses multilayer piezoelectric cantilever actuators (MPCAs), has attracted attention because of its small size, low cost, ease of manufacture, and desirable piston movement. However, owing to the complex driving principles of MPCAs, no adequately efficient and appropriate method currently exists that can be used to analyze and predict the performance of piezoelectric cantilever MEMS loudspeakers. In this study, the equivalent circuit method (ECM) is adopted to theoretically model piezoelectric cantilever MEMS loudspeakers, and an ECM model with a special MPCA transformer for electromechanical conversion is proposed. With the proposed ECM model, the performance characteristics of piezoelectric cantilever MEMS loudspeakers, such as the displacement and sound pressure response, can be calculated efficiently and conveniently. To verify the accuracy of the ECM model, the finite element method is adopted for simulation, and the simulated results are compared with those of the ECM models. A satisfactory agreement was found, which verifies the accuracy of the proposed ECM model.

scholarly journals The global analysis of a structure on the basis of precast building

2019 ◽  
Author(s):  
Teresa Grabiec-Mizera ◽  
Michał Kaczmarczyk ◽  
Mieczysław Kuczma
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Analytical Method ◽  
Global Analysis ◽  
Design Stage ◽  
Building Structure ◽  
The Finite Element Method ◽  
Structural Behaviour ◽  
Load Bearing ◽  
Element Method

The aim of the paper is to present a global analysis of a precast, reinforced building structure. At the design stage, information about structural behaviour of particular elements and the whole structure as well as its response to applied loads are obtained. While solving the problem, the load-bearing elements and the type and deformability of connections have to be defined. The latter is especially significant in the case of precast structure models. Calculations according to the analytical method are going to be verified by the finite element method.

scholarly journals Measuring scheme for determination of loads acting on the side frame of the bogie from a wheelset

2021 ◽  
Vol 264 ◽  
pp. 05035
Author(s):  
Rustam Rahimov ◽  
Anastasia Nekrasova ◽  
Larisa Ogorodnikova ◽  
Grigory Lisovsky ◽  
Dilfuza Zairova ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Strain Gauges ◽  
Theoretical Studies ◽  
The Finite Element Method ◽  
Dynamic Tests ◽  
Accuracy Of Measurements ◽  
Measuring Scheme ◽  
Element Method

The study aims to develop a measuring circuit to determine the loads acting on the side frame of the bogie from the wheelset when the wagon is moving. The paper reviews and analyzes experimental methods for measuring the vertical and lateral forces acting on the side frame of the bogie from the wheelset when the wagon is moving. Theoretical studies of the stress-strain state of the side frame of a freight wagon bogie were carried out using the finite element method under the action of loads on the axle opening from the wheelset. As a result of theoretical studies by the finite element method, the places for the installation of strain gauges were determined, and a method for processing the received signals was selected. The developed measuring scheme makes it possible to determine the spatial force effect acting on the side frame of the bogie from the wheelset, which makes it possible, without increasing the number of measuring channels in the equipment, to reduce the number of strain gauges for measuring the considered loads while running dynamic tests. In addition, it improves the accuracy of measurements of vertical loads, with the help of which the coefficient of dynamic addition of unsprung parts of the bogie is calculated.

Testing and Analysis of the Inner Stress in Adhesive Coating Layer Using Strain Gauges and Finite Element Method

2005 ◽  
Vol 490-491 ◽  
pp. 667-671 ◽  
Author(s):  
Xiao Ling Zheng ◽  
Min You ◽  
Yong Zheng ◽  
Hai Zhou Yu ◽  
Chun Mei Yang
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Adhesive Layer ◽  
Epoxy Adhesive ◽  
Strain Gauges ◽  
The Finite Element Method ◽  
Curing Procedure ◽  
Adhesive Coating ◽  
Element Method

The residual stress in epoxy adhesive layer deposited on metal and other substrate at room temperature is studied. With embedded strain gauges in arranged depth of epoxy layer, the strain changes in the adhesive layer induced by the curing procedure and the changes of ambient temperature were measured to evaluate the changes of residual stress in place during a period after the curing procedure finished. The actual strain in epoxy adhesive layer from curing is used to estimate the residual stresses in it. While taking the strain obtained from the surface of the adhesive layer as free strain, the residual stress can be calculated and presented a strongly cyclic variation with a period of 24 h. The inner stress is also analyzed using the finite element method.

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