Some Factors Influencing Friction Brake Performance: Part 3—Computer Simulation of the Lining Wear Process in Friction Brakes

1989 ◽  
Vol 111 (1) ◽  
pp. 13-18
Author(s):  
Z. Barecki ◽  
S. F. Scieszka
Keyword(s):  
Computer Simulation ◽  
Mechanical Characteristics ◽  
Friction Materials ◽  
Wear Process ◽  
Factors Influencing ◽  
Modelling Procedure ◽  
Brake Performance ◽  
Friction Brake ◽  
Friction Lining ◽  
Simulative Model

In this paper the simulative model of the friction lining wear process in a winding gear, post type, brake is presented. In the modelling procedure, the wear characteristics of the friction materials and the brake variables typical for winding brakes, for example, the elastic property of the brake elements were taken into consideration. The modelling of the friction lining wear process was used to predict associated changes in the pressure distribution, and other mechanical characteristics of the brake system.

Some Factors Influencing Friction Brake Performance: Part 1—Investigation of Full-scale Brake Systems

1989 ◽  
Vol 111 (1) ◽  
pp. 2-7
Author(s):  
Z. Barecki ◽  
S. F. Scieszka
Keyword(s):  
Pressure Distribution ◽  
Elastic Deformation ◽  
Full Scale ◽  
Factors Influencing ◽  
Braking Torque ◽  
Brake Performance ◽  
Friction Brake ◽  
Friction Lining

In this paper the effect on braking torque of the geometry of contact between brake shoes and drums is presented. It is shown that elastic deformation as well as errors in dimensional and assembly errors substantially affect the value of the braking torque. Investigations of pressure distribution on friction lining, brake factor, brake element deformation, and wear of linings carried out on mine winder installations are presented.

Wear Factors of Tillage Machines Working Tools

2013 ◽  
Vol 379 ◽  
pp. 32-35
Author(s):  
A.V. Eremeev
Keyword(s):  
Abrasive Wear ◽  
Wear Resistant ◽  
Wear Process ◽  
Factors Influencing

The paper provides brief classification of wear types of tillage machines working tools. Also factors influencing abrasive wear process are determined in the case of cultivator shank of Kuzbass 8.5 seeding machine. Principles of development of wear-resistant materials and coatings are discussed.

scholarly journals Verification of the flexion and shear behavior in masonry panels accordance to ABNT NBR 15961-1 (2011), EN 1996-1-1 (2005) and ACI TMS 530 (2013)

2018 ◽  
Vol 11 (4) ◽  
pp. 673-685
Author(s):  
R. C. MATA ◽  
C. S. RAMOS ◽  
M. L. C. SILVA
Keyword(s):  
Computer Simulation ◽  
Finite Element ◽  
Numerical Model ◽  
Design Criteria ◽  
Two Dimensional ◽  
Finite Element Software ◽  
Modelling Procedure ◽  
Increasing Trend ◽  
American Standard ◽  
Compression Level

Abstract This paper presents a numerical analysis of the mechanical behavior of structural masonry panels submitted to horizontal and vertical stresses. To evaluate the design process of these structures, the results obtained by the computer simulations were compared with the results determined by the design criteria of ABNT NBR 15961-1 (2011), ACI TMS 530 (2013) and EN 1996-1-1 (2005). The finite element software DIANA v.9.3 was used to simulate two-dimensional models with the simplified micro modelling procedure. The results obtained by the normative standards were more conservative than the results of the numerical model, as expected. With the increase of the pre-compression level, the computer simulation has demonstrated the increasing trend of the values of resistant forces, besides the change of the way of rupture of the panels. Among the three standards evaluated, the American Standard was the most conservative.

Analysis of mechanical behaviors of internal helically wound strand wires of stranded wire helical spring

2017 ◽  
Vol 232 (6) ◽  
pp. 1009-1019 ◽  
Author(s):  
Xiaoyong Li ◽  
Liang Liang ◽  
Shijing Wu
Keyword(s):  
Contact Force ◽  
Axial Load ◽  
Mechanical Characteristics ◽  
Helix Angle ◽  
Wire Rope ◽  
Helical Spring ◽  
Core Wire ◽  
Mechanical Behaviors ◽  
Factors Influencing ◽  
Design And Manufacturing

A stranded wire helical spring is a cylindrical helical spring, which is usually composed of an optional core wire and several layers of twisted external wires. The mechanical behavior of the internal helically wound strand wire is critical to determining the spring performance. Based on the previous studies of the mechanical properties of wire rope, a mathematical model to calculate the curvature of the helically wound strand wires, twist, and contact force among the adjacent wires of strand wires spring is established when the spring is subjected to axial load. The proposed kinematics is based on the assumption that there is no friction among the adjacent wires. Furthermore, a parametric study of factors influencing the curvature, twist, and contact force, such as the helix angle of spring and strand and deformation types, is committed for understanding of the mechanical characteristics of the helically wound strand wires with different geometric parameters. It is found that the curvature and twist are strongly dependent upon the two angles. Moreover, this study can provide significant reference for the design and manufacturing of the spring to control the contact force among external wires.

scholarly journals Use of the Fuzzy-Logic for Control of Accuracy and Increase of Production Quality

2018 ◽  
pp. 52-57
Author(s):  
I. Hrihorenko ◽  
S. Hrihorenko ◽  
E. Bezborodyi
Keyword(s):  
Computer Simulation ◽  
Fuzzy Logic ◽  
User Interface ◽  
Technological Process ◽  
Production Quality ◽  
Fuzzy Logic System ◽  
Factors Influencing ◽  
Definition Of ◽  
Logic System

The paper deals with the solution of the scientific and practical task of controlling the accuracy of the parameters of the process of making kefir and improving its quality by creating a heuristic analyzer based on the user interface of the fuzzy logic system. The factors influencing the accuracy of the operation of the digital meter are analyzed, the possibility of using the fuzzy logic apparatus has been proved to determine the parameters of the technological process that ensure the maximum quality of the product. Computer simulation was carried out, which confirmed that the creation of a heuristic analyzer for determining the quality of yogurt is appropriate and necessary in order to prevent the production of low-quality products through the definition of the stage of production on which there is a deviation of the technology and timely eliminate the violation.

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