Contents of Journal of Mechanical Engineering 64, 1 (2013)


                                                                       
PAULECH, J., GOGA, V., VÁRY, M.: Various solutions to determine cooling
of electric copper conductor with PVC insulation                               1

TESAR, A.: Tuned vibration control  in aeroelasticity of  slender carbon 
fiber vs laminated wood bridges                                               17

GOGA, V.: Determination of plane stress using finite element method and
by experimental measurement                                                   38                                                         

CHMELKO, V., KRŠŠÁK, P.: The elasto-plastic state solution of a heavy-wall
cylindrical pressure vessel using bilinear stress-strain model. 
Part 1: Derivation of analytical relations                                    51

CHMELKO, V., ŠULKO, M., GARAN, M.: The elasto-plastic state solution 
of a heavy-wall cylindrical pressure vessel using bilinear stress-strain 
model. Part 2: Application - calculation and verification of the burst 
pressure of the vessel                                                        63

Abstracts

Various solutions to determine cooling of electric copper conductor with PVC insulation

J. PAULECH, V. GOGA, M. VÁRY

This paper deals with calculation of cooling process of electric Cu conductor with PVC insulation. Various types of solutions were performed. Analytical solution considers free convection and radiation effects during heat transfer. Numerical solution was performed by Finite Element Method (FEM) using software ANSYS Workbench, and fluid flow solution was performed by Computational Fluid Dynamics (CFD) analysis with software ANSYS CFX. All obtained results were compared with results of the experimental measurement.

Tuned vibration control in aeroelasticity of slender carbon fiber vs laminated wood bridges

A. TESAR

Tuned vibration control in aeroelasticity of slender carbon fiber and laminated wood bridges is treated in the present paper. The approach suggested takes into account multiple functions in aeroelastic analysis and flutter of such slender bridges subjected to laminar and turbulent wind flow. Tuned vibration control approach is presented with application on an actual bridge. Some results obtained are discussed.

Determination of plane stress using finite element method and by experimental measurement

V. GOGA

The paper presents the use of finite element method to assess the strength of the structure in the state of plane stress. Determination of plane stress was performed by static structural finite element analysis, by finite element simulation of strain gauge measurement, and by experimental measurement. Thin aluminium specimen with specific shape was tested. Results of finite element analyses and simulations were compared with experimental measurements results.

The elasto-plastic state solution of a heavy-wall cylindrical pressure vessel using bilinear stress-strain model.
Part 1: Derivation of analytical relations

V. CHMELKO, P. KRŠŠÁK

This article presents the solution of an elastic-plastic state of a heavy-wall cylindrical pressure vessel. The solution is based on the constant volume theorem for a plastic strain process where as a material model a bilinear model for the stress-strain intensity is considered. In this paper, terms of stresses in the wall of a heavy-wall cylindrical pressure vessel with flat bottoms (without reducing the wall thickness) were derived using the bilinear material model without considering the influence of pipeline shell nearby the bottom of the vessel.

The elasto-plastic state solution of a heavy-wall cylindrical pressure vessel using bilinear stress-strain model.
Part 2: Application - calculation and verification of the burst pressure of the vessel

V. CHMELKO, M. ŠULKO, M. GARAN

This article presents the derivation of analytical solution of the burst pressure of cylindrical vessel with hardening material model. The material model is considered a bilinear model for stress-strain intensity. Solution is based on the constant volume theorem for plastic strain process. Derived analytical equations have been verified by experimental measurement on pipe models in laboratory and also by the numerical modelling using the Finite Element Method. The experimental results comply with analytical solution.