Erratum to “Analytical and finite element method design of quartz tuning fork resonators and experimental test of samples manufactured using photolithography 1-significant design parameters affecting static capacitance C0”

In this study an attempt is made to predict displacements and stresses in face-hobbed spiral bevel gears by using the finite element method. A displacement type finite element method is applied with curved, 20-node isoparametric elements. A method is developed for the automatic finite element discretization of the pinion and the gear. The full theory of the generation of tooth surfaces of face-hobbed spiral bevel gears is applied to determine the nodal point coordinates on tooth surfaces. The boundary conditions for the pinion and the gear are set automatically as well. A computer program was developed to implement the formulation provided above. By using this program the influence of design parameters and load position on tooth deflections and fillet stresses is investigated. On the basis of the results, obtained by performing a big number of computer runs, by using regression analysis and interpolation functions, equations for the calculation of tooth deflections and fillet stresses are derived.

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Design of an Automated Multiposition Dynamic Wheelchair

Sensors ◽

10.3390/s21227533 ◽

2021 ◽

Vol 21 (22) ◽

pp. 7533

Author(s):

Luis Antonio Aguilar-Pérez ◽

Juan Carlos Paredes-Rojas ◽

Jose Israel Sanchez-Cruz ◽

Jose Alfredo Leal-Naranjo ◽

Armando Oropeza-Osornio ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Dynamic Analysis ◽

Experimental Test ◽

Pid Controller ◽

Critical Position ◽

Electric Actuator ◽

Manual Wheelchair ◽

Element Method

This work presents a design for an automatized multiposition dynamic wheelchair used to transport quadriplegic patients by reconfiguring a manual wheelchair structure. An electric actuator is attached to a four-bar mechanism fixed to each side of a wheelchair’s backrest to reach multiposition. The entire device is actuated through a PID controller. An experimental test is carried out in a simplified wheelchair structure. Finally, the structure of the wheelchair is evaluated through the Dynamic analysis and Finite Element Method under the payload computed with the most critical position reached by the mechanism.

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Structural Deformation and Stress Analysis of Aircraft Wing by Finite Element Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.906.318 ◽

2014 ◽

Vol 906 ◽

pp. 318-322 ◽

Cited By ~ 1

Author(s):

M. Fazlay Rabbey ◽

Anik Mahmood Rumi ◽

Farhan Hasan Nuri ◽

Hafez M. Monerujjaman ◽

M. Mehedi Hassan

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Structural Properties ◽

Structural Deformation ◽

Design Parameters ◽

Design Phase ◽

Aircraft Wing ◽

Detail Design ◽

The Cost ◽

Element Method

Wing of an aircraft is lift producing component. It makes aircraft airborne by generating lift>weight. The wing must take the full aircraft weight during flying. So, it is very sophisticated task for designing a wing by keeping consideration of every design parameters simultaneously. This paper contains analysis of structural properties of wing by using finite element method. For well-organized design all the variables must be considered from the beginning of the design phase. The design phases for aircraft are: conceptual, preliminary and detail design. Until the preliminary design phase the aircraft structure is not considered. During these phases the material of the wing should be selected in such a way so that it can perform efficiently with less unexpected phenomena (drag) for which responsible properties are displacement, stress etc. Currently the most focusing area for the aero-elastic investigation is to design wing with good aerodynamic shape which will associated with less dragging structural behavior. It helps to reduce SFC (Specific Fuel Consumption) and so the cost. The analysis on that has done through Computational means as well as simulation technique to develop knowledge about the variation of aircraft wing structural properties.

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Influence of Acetabular Liner Design on Periprosthetic Pressures during Daily Activities

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.601.159 ◽

2014 ◽

Vol 601 ◽

pp. 159-162

Author(s):

Mircea Krepelka ◽

Mirela Toth-Taşcău

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Contact Pressure ◽

Design Parameters ◽

Acetabular Liner ◽

Hip Prostheses ◽

Small Influence ◽

The Difference ◽

Contact Pressures ◽

Element Method

In this study, periacetabular pressures produced by different acetabular liner geometries were analyzed using Finite Element Method. The cup models consist of hemispherical metal shells fitted with normal and different chamfered polyethylene liner geometries, with the same degree of femoral head coverage. The aim of this study was to understand the influence of the design parameters of the chamfered liners, which are primarily designed to increase the range of motion (ROM) of the hip joint and reduce the risk of impingement, on the acetabular contact pressures. The cup models were loaded to simulate periacetabular pressures during routine activities. The proposed models have been analyzed considering a cup position of 40olateral abduction and 15oanteversion. The results show that the difference in contact pressure between the normal and chamfer models was not substantial in the given orientation of the cup. Also, the increase of the chamfer angle has a small influence on the maximum contact pressures, although that could be also dependent on the reduction of the polyethylene thickness. Pre-clinical testing of total hip prostheses using Finite Element Method enables the evaluation of contact pressures and stress distribution, and proves to be a valuable tool to analyze the parameters reducing the contact pressure.

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Robust Optimization for Tube Bending Process Based on Finite Element Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.531-532.746 ◽

2012 ◽

Vol 531-532 ◽

pp. 746-750

Author(s):

Xue Wen Chen ◽

Ze Hu Liu ◽

Jing Li Zhang

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Robust Design ◽

Process Parameters ◽

Design Method ◽

Design Parameters ◽

Tube Bending ◽

Performance Variation ◽

Bending Process ◽

Element Method

The main causes of performance variation in tube bending process are variations in the mechanical properties of material, initial tube thickness, coefficient of friction and other forming process parameters. In order to control this performance variation and to optimize the tube bending process parameters, a robust design method is proposed in this paper for the tube bending process, based on the finite element method and the Taguchi method. During the robust design process, the finite element analysis is incorporated to simulate the tube bending process and calculate the objective function value, the orthogonal design method is selected to arrange the simulation experiments and calculate the S/N ratio. Finally, a case study for the tube bending process is implemented. With the objective to control tube crack (reduce the maximum thinning ratio) and its variation, the robust design mathematical model is established. The optimal design parameters are obtained and the maximum thinning ratio has been reduced and its variation has been controlled.

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