scholarly journals The issues of designing of construction features of the internal combustion cam engine

2017 ◽  
Vol 171 (4) ◽  
pp. 259-264
Author(s):  
Tomasz BOROWCZYK ◽  
Mikołaj SPADŁO
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Internal Combustion ◽  
Constant Volume ◽  
The Finite Element Method ◽  
Starting Point ◽  
Piston Mechanism ◽  
Crank Mechanism ◽  
Element Method

On the pages of the article described cam-piston mechanism developed as an alternative to piston crank mechanism. The main feature of this mechanism is that the piston is dwell in the TDC by the 30°CA and thus allows combustion of the fuel in constant volume. Authors presented the process of designing an analytical cam. The starting point for the calculation was the displacement of piston graph and the limits of acceleration and velocity values obtained. The results of strength calculations of the cam with regard to fatigue problems are also presented. Calculations were carried out in order to reduce the weight of the cam. For this purpose, the Finite Element Method was used.

Simulation of Thermo Mechanical Behavior of Structures by the Numerical Resolution of Direct Problem

2011 ◽  
Vol 61 ◽  
pp. 85-93
Author(s):  
B. Aouragh ◽  
J. Chaoufi ◽  
H. Fatmaoui ◽  
Jean Christophe Dupré ◽  
Claude Vallée ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Infrared Thermography ◽  
Direct Problem ◽  
The Finite Element Method ◽  
Numerical Techniques ◽  
Numerical Resolution ◽  
Starting Point ◽  
Experimental And Numerical Modeling ◽  
Element Method

The aim of our study is to develop an approach to both experimental and numerical modeling to the thermal behavior of a material by identifying these thermal parameters. The theoretical part is based on the finite element method which is a starting point to solve a two-dimensional inverse heat. The experimental measurements are performed by infrared thermography. All these experimental and numerical techniques give this method properties valued in the industrial world as the non-intrusive measurements and real-time calculations. For this, we have supported a system of equations and the temperature field, so before starting the inverse problem, we addressed the direct problem by finite element method that has been compared to measures experimental infrared thermography well to check the validity of equations, so it’s the purpose of this work.

scholarly journals Biomechanical Analysis Of The Intervertebral Disc Implant Using The Finite Element Method

2015 ◽  
Vol 15 (3) ◽  
pp. 57-66
Author(s):  
W. Kajzer ◽  
A. Kajzer ◽  
I. Pindycki
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Intervertebral Disc ◽  
Vertebral Column ◽  
Motor Vehicle ◽  
Biomechanical Analysis ◽  
The Finite Element Method ◽  
Starting Point ◽  
Locomotive Activity ◽  
Element Method

Abstract Dysfunctions of the vertebral column belong to a group of civilisation diseases and they affect approximately 80% of population. The underlying cause is modern (sedentary) lifestyle, low locomotive activity of people and frequent motor vehicle and sports accidents. Despite civilisation’s progress, no injury prophylactics or prevention of dysfunctions of the vertebral column have been introduced. The key element influencing function of the vertebral column is the intervertebral disc. It enables multidimensional movements and constitutes a basic connective element between the joints of the vertebral column. It also enables performing basic daily activities. Acting as a “damper”, it cushions vibrations and transmits loads between the vertebrae. One of the diseases affecting the intervertebral disc is discopathy. This is the most common degenerative disease, which can be treated by both conservative and surgical treatment. After removal of the damaged disc, it can be replaced by an adequate implant, which will assume its function. The implant will be expected to restore the vertebral column motor function, as well as to eliminate the pain resulting from compression of the spine caused by the damaged disc. This paper presents a biomechanical analysis using the finite element method for the L2-L3 vertebrae system with natural intervertebral disc, and the L2-L3 – implant of the intervertebral disc system. Two cases of the system vertebrae-implant were analysed which differed in the placement of the artificial disc in the intervertebral space. Within the conducted analysis, the state of displacement, strain and stress of reduced analysed systems and their individual elements was determined. A comparative analysis of the results and calculations was performed, also conclusions and observations were formulated, constituting a starting point for building more advanced calculation models and further analyses of such implants.

Method for calculating the load capacity of a cycloidal gear reducer with plastic satellites

2020 ◽  
pp. 15-20
Author(s):  
A.S. Ivanov ◽  
M.M. Ermolaev ◽  
A.V. Chirkin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Calculation Method ◽  
Load Capacity ◽  
System Of Equations ◽  
The Finite Element Method ◽  
Crank Mechanism ◽  
Elastic Characteristics ◽  
Element Method

A method for calculating the load capacity of cycloidal gear reducers with a parallel crank mechanism is described, taking into account the elastic characteristics of the parts and the clearance in engagement. The calculation can also be used for cycloidal gear reducers of other types due to the use of the finite element method (FEM) and modifications of the system of equations used in the FEM. An example of calculating of a reducer with a satellite made of polyamide is given. Keywords cycloidal gear reducer, calculation method, finite element method, satellite from plastic. [email protected]

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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