Contents of Journal of Mechanical Engineering 58, 6 (2007) 




MA, G. L., XU, H., CUI, W. Y.: Finite element analysis of load 
performance for truck radial tire                                       313

JAVADI, H., RAJABI, I., YAVARI, V., KADIVAR, M. H.: Three-dimensional
solutions for contact area in laminated composite pinned joints 
with symmetric and non-symmetric stacking sequences                     327

KORMANÍKOVÁ, E.: Optimal design of laminate circular cylindrical shell  340

BEREZIN, S. Y., CHUMAKOV, R. E.: Feasibility analysis of thread-forming
assembly processes                                                      351

Abstracts



Finite element analysis of load performance for truck radial tire

GAI-LING MA, HONG XU, WEN-YONG CUI

By building a Finite Element Model (FEM) of the 11.00R20 truck radial tire through MSC/MARC/MENTAT FEA software, deformations and load performances of the tire under static load and stable rolling are calculated. Under stable rolling, the effects of speed, load and pressure on contact normal force distribution on print area are analysed; and then, the load properties curves, the contact normal force distribution graphs and the changing trends of contact normal force with speed, load and pressure are obtained.

Three-dimensional solutions for contact area in laminated composite pinned joints with symmetric and non-symmetric stacking sequences

H. JAVADI, I. RAJABI, VAHID YAVARI, MOHAMED H. KADIVAR

The aim of this paper is computing and evaluating the behaviour of the laminated composite plate at the contact area in single lap, mechanically fastened joints. The analyses involve three-dimensional finite element models performed by ABAQUS 6.4-PR11 code to evaluate the stress distribution in contact surface, separation angle, the magnitude and location of maximum radial stress. Results are determined for composite laminates with different layer configurations and attempts are made to validate the models with previous works. For cross-ply and angle-ply configurations only symmetric stacking sequences are used while for quasi-isotropic laminate both symmetric and non-symmetric models are generated. In cross-ply laminate symmetric separation about bearing plane could be found while in quasi-isotropic and angle-ply laminates non-symmetric separation occurs. Also, the separation angle is less than 90° in symmetric laminates and greater than 90° in some plies of non-symmetric laminates.

Optimal design of laminate circular cylindrical shell

EVA KORMANÍKOVÁ

The paper deals with a numerical approach of modelling of laminate circular cylindrical shells and with their optimal design. The main idea of design optimization is based on finding a mathematical relationship between the objective function or constraints and design variables. The basic problem is the minimization of the weight function subject to thickness and displacement constraints. In the optimization process the modified feasible direction method is used. The analysis and optimization of the thickness of the shell roof fabricated from laminate is made by the finite element method in program COSMOS/M. In the illustrative example, numerical results of the optimization process are depicted.

Feasibility analysis of thread-forming assembly processes

SERGEY Y. BEREZIN, ROMAN E. CHUMAKOV

The paper presents a complex technique of efficiency evaluation of the thread-forming assembly based on feasibility analysis. Namely, it contains the structural analysis of the assembly processes, the factors that determine operation characteristics of ready-made threading connections, quality and economic efficiency of the process. There is also a comparative analysis of different ways to implement an assembly using different types of equipments and processes.