a review - Acta Technica Corviniensis

CONTENT of
FASCICULE 2 / 2013
[APRIL–JUNE]
1. Juraj HUDÁK, Miroslav TOMÁŠ – SLOVAKIA
CREATION FORGING DIES’ FUNCTIONAL SURFACE USING PRESENT CAD/CAM SYSTEM 21
Abstract: Differences in shape of parts produced by forming in a large extent follow from used shape of incoming raw
product. Contribution deals with methods for creating functional surfaces of forming dies using CAD systems and
focuses to bulk forming processes – die forging. The source for functional surfaces design of forging die is solid model of
forged piece with defined mould joint, chamfers and radii. Next are presented two methods of forging dies creating
according to CAD systems possibilities – mould cavity mode and assembly mode (Merge-Cut Out command). Both method
are presented step by step and there are compared their advantages from the user’s view.
2. M. RAMU, Raja V. PRABHU – INDIA
METAMODEL BASED ANALYSIS AND ITS APPLICATIONS: A REVIEW 25
Abstract: Engineering analysis using computer based simulation is used extensively to predict the performance of a
system. Such engineering analyses rely on running expensive and complex computer codes. Approximation methods are
widely used to reduce the computational burden of engineering analysis. Statistical techniques such as design of
experiments and Response Surface Methodology (RSM) are widely used to construct approximate models of these costly
analysis codes which minimize the computational expense of running computer analyze. These models referred as
metamodels, are then used in place of the actual analysis codes to reduce the computational burden of engineering
analyses. Use of metamodels in the design and analysis of computer experiments has progressed remarkably in the past
three decades. This paper reviews the state of the art of constructing metamodels and its evolutions over the past
three decades.
3. Traian MAZILU – ROMANIA
USING THE GREEN’S FUNCTION METHOD TO ANALYSE THE RESPONSE OF AN INFINITE WIRE
ON VISCO-ELASTIC SUPPORT UNDER MOVING LOAD 35
Abstract: The paper herein deals with the response of an infinite wire on viscoelastic support under moving harmonic
load in order to point out the basic features of the overhead contact wire system (catenary). To this end, the Green’s
function method is applied. The wire response under a stationary harmonic load is similar to the one of the system with
a single degree of freedom, excepting the phase resonance. When the harmonic load moves at sub-critical velocities,
the resonance frequency decreases and the wire response becomes higher. At the over-critical velocities, the elastic
waves do not propagate in front of the harmonic load.
4. Abdelmajid Sadiki LAMARI, Anass El FATTOUH, Salah Eddine El QOUATLI,
Rachida NAJIH, Abdelilah CHTAINI – MAROCCO
ELECTROCHEMICAL DETECTION OF ASCORBIC ACID USING A POLYMER MODIFIED CARBON
PASTE ELECTRODE 39
Abstract: Ascorbic acid (Vitamin C) is a water soluble organic compound that participates in many biological processes.
This paper reports the synthesis of polymer modified carbon paste electrode and its application for the electrochemical
detection of ascorbic acid (AA). The cyclic voltammetry results obtained corrobate with square wave voltammetry. The
influence of variables such the concentration of ascorbic acid adsorbed onto polymer, and the pH of solution were
tested. The capacity of prepared electrode (P-CPE) for selective detection of AA was confirmed in a sufficient amount
of ascorbic acid. The observed linear range for the determination of AA concentration was from 0.2 mM to 9 mM. The
detection limit was estimated to be 5. 48 mM.
5. Miroslav GOMBÁR - SLOVAKIA
INSTALATION OF HIGH PRESSURE WATER PUMP FOR A WATER JET TECHNOLOGY – HIGH
PRESSURE WATER PUMP IN NON-CONVENTIONAL TECHNOLOGIES 43
Abstract: The technology water jet is complex hydrodynamic process at ultrahigh pressures, which can be characterized
at present days as the area of jet technologies. The process alone requires the most effective and economical utilisation
of energy of water jet. It directly is connected with the most convenient determination of production – technology
parameters of jet fluid, according to respect of basic physical properties of fluid as a cutting medium and the respect of
hydrodynamic rule.
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