Contents of Journal of Mechanical Engineering 62, 3 (2011)

JANGHORBAN, M., ROSTAMSOWLAT, I.: Three-dimensional elasticity analysis 
of bi-directional functionally graded square plate using differential 
quadrature method                                                      129                                                      

CHANDRASHEKHAR BENDIGERI: Coupled field analysis of amplified piezo 
actuator by Finite Element Method                                      143

GOGA, V., JEDINÝ, T., KRALOVIČ, V., MATEJ, J.: Virtual mechatronic 
model of Electronic Differential System - EDS                          159                      

ZARE, A., JAVADI, H., PANAHI, B.: Floating structure response to 
underwater shock loading                                               171

Abstracts

Three-dimensional elasticity analysis of bi-directional functionally graded square plate using differential quadrature method

M. JANGHORBAN, I. ROSTAMSOWLAT

A three-dimensional elasticity analysis of bi-directional FG square plate subjected to mechanical loadings is investigated. The material properties are assumed to be graded in the thickness and longitudinal direction, which vary according to the simple power law distribution. The equations of equilibrium and the related boundary conditions are derived using the three-dimensional elasticity theory. Differential quadrature method (DQM) as an efficient and accurate numerical tool is adopted to solve the equilibrium equations. The accuracy of the method is demonstrated by comparing the results with those of the existing solutions. It should be mentioned that results for three-dimensional elasticity analyses of the FG and bi-directional FG square plate subjected to mechanical loadings by differential quadrature method are not available yet and the results can be used as benchmarks for the future works.

Coupled field analysis of amplified piezo actuator by Finite Element Method

CHANDRASHEKHAR BENDIGERI

In the modern world, smart materials play a very important role in technological evolution. Amplified piezo actuator is made of piezoelectric smart material and works on the mechanism of amplification displacement that is produced by piezo element. This has an advantage of producing higher displacement as compared to direct piezo actuator under the same operational conditions. The amplified piezo actuator is considered for the present study and finite element analysis is carried out. The methods of coupled field analysis adopted in present work are described for both static and dynamic analyses. This work contributes to understanding smart device involving piezoelectric materials and thereby helps to choose the smart device for suitable smart structure application.

Virtual mechatronic model of Electronic Differential System - EDS

V. GOGA, T. JEDINÝ, V. KRALOVIČ, J. MATEJ,

In modern science, computer analyses and simulations represent an essential part in the creation and design of mechatronic systems. This paper discusses a newly-designed virtual model of an electronic differential lock (EDS - Electronic Differential System) which consists of mechanical parts created in MSC.ADAMS/View simulation environment and a regulatory scheme designed in MATLAB/Simulink. The two interlinking programs form the base for a mechatronic model evaluation based on various driving conditions.

Floating structure response to underwater shock loading

A. ZARE, H. JAVADI, B. PANAHI

The paper presents an analysis of a floating structure response to underwater shock loading. An explicit finite element approach is used for the shock fluid-structure interaction. The floating structure modeled in this study is a scaled 3D ship. Underwater effects such as shock wave, bubble, cavitation and acceleration are considered. At the first part of this study, the model is checked with various experimental and theoretical results such as modal test results and peak pressures. After validation of the created model, the effects of shock wave, bubble and cavitation are investigated. This study shows that the shock factor can be used as a criterion of shock severity.