scholarly journals Constructive Optimization of Vulcanization Installations in Order to Improve the Performance of Conveyor Belts

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3607 ◽  
Author(s):  
Dan Dobrota ◽  
Valentin Petrescu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Mechanical Characteristics ◽  
Fem Analysis ◽  
Rubber Matrix ◽  
Special Importance ◽  
The Finite Element Method ◽  
Type Defect ◽  
Conveyor Belts ◽  
Last Stage

Conveyor belts of special importance must have superior mechanical characteristics. The joining by vulcanization of the conveyor belts allows to obtain superior performances, but it has been found that at the vulcanizing joint of the conveyor belts, there is a “bell”-type defect. This type of defect can cause the quick removal of the conveyor belts from use; thus, within this paper, we realized the constructive optimization of vulcanization installations using the finite element method (FEM). Thus, the FEM analysis was performed for the installation used at the present time, which has four spacers for stiffening, moving to the next stage to a stiffening system with seven spacers and, in the last stage, it was proposed to use a stiffening plate. The joined conveyor belts were of type ST 2000, and by the constructive optimization of the vulcanizing press type DSLQ, the bell-type defect was greatly reduced. Also, an analysis of the effects that the constructive optimization of the vulcanization installation has on the resistance to extraction of the metallic insert from the rubber matrix of the costs determined by the proposed constructive modifications, has been performed.

scholarly journals Bioengineering Methods of Analysis and Medical Devices: A Current Trends and State of the Art

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 797
Author(s):  
Marco Cicciù
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Mechanical Characteristics ◽  
New Technologies ◽  
Fem Analysis ◽  
Load Cycle ◽  
Anatomical Structures ◽  
Infinite Elements ◽  
Current Trends ◽  
Element Method

Implantology, prosthodontics, and orthodontics in all their variants, are medical and rehabilitative medical fields that have greatly benefited from bioengineering devices of investigation to improve the predictability of clinical rehabilitations. The finite element method involves the simulation of mechanical forces from an environment with infinite elements, to a simulation with finite elements. This editorial aims to point out all the progress made in the field of bioengineering and medicine. Instrumental investigations, such as finite element method (FEM), are an excellent tool that allows the evaluation of anatomical structures and any facilities for rehabilitation before moving on to experimentation on animals, so as to have mechanical characteristics and satisfactory load cycle testing. FEM analysis contributes substantially to the development of new technologies and new materials in the biomedical field. Thanks to the 3D technology and to the reconstructions of both the anatomical structures and eventually the alloplastic structures used in the rehabilitations it is possible to consider all the mechanical characteristics, so that they could be analyzed in detail and improved where necessary.

Virtual Experimental Analyzes of the Normal and Arthrotic Hip

2020 ◽  
Vol 896 ◽  
pp. 3-14 ◽  
Author(s):  
Daniel Cosmin Calin ◽  
Dragos Laurentiu Popa ◽  
Alexandru Florian Grecu
Keyword(s):  
Computed Tomography ◽  
Finite Element Method ◽  
Finite Element ◽  
Hip Joint ◽  
Special Importance ◽  
Virtual Model ◽  
The Finite Element Method ◽  
Normal Walking ◽  
Tomographic Images ◽  
Main Components

The hip joint is spheroidal type which allows three movement axes, with a special importance in statics and locomotion. The study of the hip joint by computerized tomography of a male, 52-year-old male patient at the Craiova County Emergency Clinical Hospital was started using Siemens equipment comprised of a magnetic resonance device and a computed tomography apparatus. Were analyzed: hip joint with the two main components of the femur and pelvic bones. To obtain the virtual components of the hip joint, 143 tomographic images from different planes were analyzed. CT images were used to define the normal hip joint. Also, the arthrotic hip virtual model was generated. These two virtual models were subjected to normal walking load and were simulated by the finite element method. The results were analyzed and compared, and important conclusions were finally drawn.

Modified Coronal Incision: Distribution of Stress in the Scalp and Cranium

1993 ◽  
Vol 30 (4) ◽  
pp. 382-386
Author(s):  
Sadanori Akita ◽  
Akiyoshi Hirano
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Distribution ◽  
Fem Analysis ◽  
Craniofacial Surgery ◽  
The Finite Element Method ◽  
Modified Method ◽  
Distribution Of Stress ◽  
Scalp Incision ◽  
Coronal Incision

Coronal incision or bitemporal incision is useful for wider visualization in craniofacial surgery. In volume-expanding surgery such as fronto-orbital advancement, however, the incisional scar in the temporal scalp is often undesirably wide and conspicuous. We modified the coronal incision to avoid the widened scar. Further, we analyzed the resulting stress distribution using the finite element method (FEM) to determine whether or not the modification we adapted was effective. The modified method of coronal scalp incision that we used for craniofacial surgery is practical and technically easy. FEM analysis showed that our method was effective in terms of mechanical strength. The simulated surgical craft model is presented and is concluded to be beneficial for further analysis in craniofacial surgery.

scholarly journals Improved Expression for Estimation of Leakage Inductance in E Core Transformer Using Energy Method

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Sivananda Reddy Thondapu ◽  
Mangesh B. Borage ◽  
Yashwant D. Wanmode ◽  
Purushottam Shrivastava
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Energy Method ◽  
Fem Analysis ◽  
Field Pattern ◽  
The Finite Element Method ◽  
Leakage Inductance ◽  
Accurate Expression ◽  
Element Method

This paper proposes a simpler and more accurate expression for estimation of leakage inductance in E core transformer, which is the most widely used transformer structure. The derived expression for leakage inductance accounts for the flux extending into air. The finite element method (FEM) analysis is made on the secondary shorted transformer to observe the H-field pattern. The results obtained from FEM analysis are used for approximating the field that is extending into air to derive an expression for leakage inductance. This expression is experimentally validated on prototype transformers of different core dimensions.

Method for the Determining Metal Mechanical Characteristics Using FEM

2021 ◽  
Vol 316 ◽  
pp. 917-922
Author(s):  
Irina Volokitina ◽  
Evgeniy Panin ◽  
Kanat Tolubaev
Keyword(s):  
Mathematical Modeling ◽  
Finite Element Method ◽  
Finite Element ◽  
Tensile Strength ◽  
Software Package ◽  
Mechanical Characteristics ◽  
Real Data ◽  
Micro Hardness ◽  
The Finite Element Method ◽  
Very High

In this paper the methods of mechanical testing of metal and the possibility of their implementation, using mathematical modeling by the finite element method in Deform software package, are considered. As the studied parameters, both the strength indicators (yield strength, tensile strength, Brinel micro-hardness), and the plasticity indicator (the number of kinks before the crack is formed), were studied. The values obtained in the simulation have a very high convergence with the real data.

scholarly journals Optimized Design of an ECAP Die Using the Finite Element Method for Obtaining Nanostructured Materials

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Patricia Ponce-Peña ◽  
Edgar López-Chipres ◽  
Edgar García-Sánchez ◽  
Miguel Angel Escobedo-Bretado ◽  
Brenda Xiomara Ochoa-Salazar ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Plastic Deformation ◽  
Finite Element ◽  
Tensile Strain ◽  
Fem Analysis ◽  
Optimized Design ◽  
The Finite Element Method ◽  
Angular Pressing ◽  
Cracking Tendency ◽  
Element Method

An alloy type A16060 was exposed to severe plastic deformation to study its reaction using the finite element method (FEM). To perform this, six different configurations were used in the design of the die’s channel for ECAP (equal channel angular pressing) to obtain nanostructure materials and to optimize the process. Thanks to simulation performed with FEM, it is possible to study the homogeneity in the deformation due to the variation of conditions affecting directly the material being processed using the ECAP technique, such as the friction coefficient, extrusion speed, and mainly the die’s channel geometry being utilized in the ECAP process. Due to the tensile strain area being located mainly in the upper part of the deformed test cylinder (plastic deformation area) which increases the fracture and cracking tendency preventing the processing through ECAP the die being utilized was modified to eliminate the tensile strain area favoring the appearance of compressive stress which reduces the cracking tendency and the fracture of the sample being processed. The FEM analysis demonstrated that the strain state changed significantly from tension to compression when the modified die was used, facilitating the processing of the piece by ECAP.

Comparison of Performance between Concentrated and Rhombic Windings for a Slotless Brushless DC Motor

2011 ◽  
Vol 130-134 ◽  
pp. 2832-2835
Author(s):  
Chang Chou Hwang ◽  
Ping Lun Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fem Analysis ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
The Finite Element Method ◽  
Brushless Dc ◽  
Three Phase ◽  
Element Method

This paper presents and compares the performance of a two-pole, three-phase slotless brushless DC motor with two types of winding configuration: concentrated and rhombic windings. Application of the finite element method (FEM) analysis to their performance calculations is performed.

scholarly journals Comparative Numerical Analysis between Two Types of Orthodontic Wire for the Lingual Technique, Using the Finite Element Method

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Rosa Alicia Hernández-Vázquez ◽  
Rodrigo Arturo Marquet-Rivera ◽  
Octavio Alejandro Mastache-Miranda ◽  
Angel Javier Vázquez-López ◽  
Salvador Cruz-López ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Clinical Trial ◽  
Finite Element ◽  
3D Imaging ◽  
Fem Analysis ◽  
The Finite Element Method ◽  
Mandibular Bone ◽  
Orthodontic Wire ◽  
Lingual Technique ◽  
The Comparative Study

In the lingual orthodontic technique, there are two paradigms regarding the type of wire used. Regardless of the material or gauge, some orthodontists choose to use the straight wire and resin and bond it to the surface of the tooth; they call it compensations. Other orthodontists prefer to bend the wire, giving it a mushroom shape. There is no specific indication for the use of each type of wire, so orthodontists use them according to their criteria. The present study establishes the bases so that it is possible to find the indications for each type of wire. A clinical trial of a lingual orthodontic patient was used. To carry out the comparative study, a straight arch was placed in his right arch and a mushroom arch in the left arch. Using 3D imaging, a high-biofidelity biomodel of the patient’s mandible was generated, with which the FEM analysis was performed, which allowed comparing the reactions of the mandibular bone and appliances with the different arches. It was found that, on the side with the straight arch, there were greater deformations, and in the mushroom arch, there were greater stresses. With this, it is possible to find which clinical cases in each type of wire are indicated.

scholarly journals Self-propelled inspection vehicle on omni wheels

2019 ◽  
Vol 254 ◽  
pp. 02002
Author(s):  
Jarosław Selech ◽  
Dariusz Ulbrich ◽  
Konrad Włodarczyk ◽  
Żaneta Staszak ◽  
Jacek Marcinkiewicz ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Control System ◽  
Power Supply ◽  
Fem Analysis ◽  
Vehicle Control ◽  
Radio Waves ◽  
The Finite Element Method ◽  
Ventilation Ducts ◽  
Vehicle Movement

In the article design of a self-propelled vehicle for inspecting ventilation ducts and ceiling structures in buildings equipped with omni wheels was presented. Such vehicles are used in places that are hard to reach for people. The vehicle was designed using the vehicle control system – ARDUINO. For this system dedicated program was written, which is used to operate it. The vehicle is remotely controlled by radio waves. Its range is about 100 meters and the power supply is a 12 V battery. The vehicle operator has joysticks (controllers) modelled on those used in game controllers that are used for precise vehicle control. The vehicle is equipped with cameras that allow to view the image in real time. The omni wheels have also been tested for strength by the finite element method (FEM). Carried out FEM analysis as part of the work allowed to determine the strength of omni wheels on the acting forces during vehicle movement.

scholarly journals Analysis of the friction (spin) welding – preliminary study

2019 ◽  
Vol 254 ◽  
pp. 02036 ◽  
Author(s):  
Michał Pietrzak ◽  
Krzysztof Wałęsa ◽  
Jan Górecki ◽  
Maciej Berdychowski
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Additional Data ◽  
Theoretical Calculations ◽  
Welding Process ◽  
Fem Analysis ◽  
Welding Parameters ◽  
The Finite Element Method ◽  
Friction Heat ◽  
Preliminary Study

This article applies to the glue-free bonding of the components made of thermoplastics, specific techniques that use friction heat to plasticize and then join two surfaces. The featured technique is a friction (spin) welding process. Welding parameters were investigated and presented. Spin welding is known to consist of four phases. Analytical calculations were made for the first step. They are focused on the changeability of welding parameters depending on weld velocity. In the next part of this article, calculations including the finite element method were performed. This provided additional data and visualization of the process, which were not available in analytical calculations. Final results of both methods were compared. This made it possible to verify the correctness of theoretical calculations and exactness of FEM analysis.

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