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1
Content available remote The Thermal Data Interpolation in Data Reduction for Evaluation of Thermal Diffusivity Measured by Flash Method
Kopal I., Koštial P., Ruziak I., Švecová Z., Kučerová J., Mokryšová M.
Machine Dynamics Problems
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2006
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Vol. 30, No. 3
163-166
EN
The paper presents a powerful algorithm useful to solve the problem of experimental data values finding don't occur within the registered experimental data set by using the one-dimensional polynomial interpolation procedure via a cubic spline method. Described free algorithm is presented in the form of Matlab routine with short author's comments.
2
Content available remote The Optimization of Tyre Construction and the Construction Influence on the Rolling Resistance
Mokryšová M., Koštial P., Kopal I., Kučerová J., Švecová Z., Ružiak I.
Machine Dynamics Problems
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2006
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Vol. 30, No. 4
68-73
EN
The rolling resistance (RR) of tyres under vertical load can be measured in the laboratory on a large smooth rolling drum. We have determined the most suitable the steel belt angle. The higher steel belt angle leads to lower rolling resistance, to the better comfort and lower fuel consumption.
3
Content available remote The Fillers Distribution Influence on Rubber Compounds Thermal Conductivity
Koštial P., Ružiak I., Kučerová J., Mokryšová M., Švecová Z., Kopal I., Bezecný J., Osipcakova D.
Machine Dynamics Problems
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2006
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Vol. 30, No. 4
12-19
EN
In the paper we are presenting the study of fillers distribution influence on rubber compounds thermal conductivity. The inhomogeneity of fillers distribution is presented on the measurements of thermal diffusivity as well as the electrical conductivity of rubber compounds.
4
Content available remote New Admitance to the Quality Evaluation of Steel Components Refinement
Kučerová J., Letko I.
Machine Dynamics Problems
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2006
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Vol. 30, No. 4
20-28
EN
In terms of ISO 9001, art. 49 we can qualify the heat treatment as one of so called "special processes". With these, we need to find out the identity or non-identity of the products by means of qualified exams (control of fracture surfaces on SEM). This can remarkably increase safety and durability of parts after their converting, because it guarantees the optimal ratio of strenght, plastic and brittle fracture properties. Advantages of the applied method: - Existing verified method and sufficiently augmented instrument technique (SEM). - Operatively and objectivity of the test. - Unpretentiousness of sample preparation. Relatively low price, regarding the heat treatment batch price, or complaints expenses.
5
Content available remote Measurements of External Temperature in Rolling Tyre
Koštial P., Kučerová J., Mokryšová M., Švecová Z., Kopal I., Ružiak I.
Machine Dynamics Problems
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2006
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Vol. 30, No. 4
7-11
EN
In this paper we are presenting a complex system for the simultaneous contact-less measurement of external tyre temperatures. The measurement is fully automatic, controlled by a personal computer, and installed "in situ" on the car. The global position system, which is connected with the PC, allows simultaneous measurements of temperatures, pressure and also the car speed.
6
Content available remote Impact Analysis the Difference of Temperatures During Vulcanization in Relation to Parameter-Deformation Characteristics and Tyre Tarameters
Šuba I., Kučerová J., Letko I.
Machine Dynamics Problems
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2006
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Vol. 30, No. 4
146-151
EN
After processing the all six measurements on thermocouples and evaluation of Aramis measurement, I will mathematically simulate dependency the parameters setting of final tyre properties by preset the running of vulcanization process. In case of success, this will allow to change final characteristics of vulcanized product without a change of green tyre composition (to program type of characteristic the finished tyre in advance), naturally in predefined range of individual parameters.
7
Content available remote Contact Measurement of Thermal Transport Properties of Laminates in Vertical and Horizontal Direction by EDPS Method
Ružiak I., Kopal I., Koštial P., Mokryšová M., Švecová Z., Kučerová J.
Machine Dynamics Problems
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2006
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Vol. 30, No. 4
97-102
EN
In this paper we present the contact measurement of thermal transport properties of distinguished laminate using the extended dynamic plane source (EDPS) method. All used methods are appropriate for the determination of thermal transport properties of materials with low thermal conductivity. Measurement errors do not exceed five percent. We have measured thermal transport properties of laminate in vertical and horizontal directions.
8
Content available remote Effects of Various Aspects on Estimate Adhesion Polyester Cord to Rubber
Nemčok O., Kučerová J.
Machine Dynamics Problems
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2004
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Vol. 28, No. 4
41-46
EN
In this paper are inherented a various aspects following by those are changed the physical and chemical properties and the values of adhesion PES cord too. Near the surface modification of cord so-called system of resorcinol-formaldehyd-latex are given the methods of surface modification - especially the modification by plasma.
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