Res. Agr. Eng., 2013, 59(3):114-119 | DOI: 10.17221/23/2012-RAE

Computer simulation of the teat-cup liner stress and strain tensorOriginal Paper

I. Karas, R. Gálik, Š. Pogran, M. Šesták
Department of Production Engineering, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic

The three-notch black pressed teat-cup liners were selected into the set of the analysed teat-cup liners, and, for comparison purposes, teat-cup liners produced from silicone mixture. Wall thicknesses of the analysed teat-cup liners were adjusted by smoothing of the middle working part in length of 30 mm. The working part thickness thus changed from the original 2.37 to 0.41 mm for a teat-cup liner produced from black mixture and from the original thickness of 2.30 to 0.40 mm for a silicone teat-cup liner. A possibility of maximum closure of teat-cup liners in the pressing tact was assessed at the working suction of 50 kPa, the flow of distilled water through a measurement device reached the value of 4.4 l/min. Under laboratory conditions, with the above criteria fulfilled, the following stress relations were detected at teat tips: black teat-cup liner 30.25 kPa, silicone teat-cup liner 23.14 kPa. From the acquired results follows that the silicone teat-cup liner showed, from the aspect of suction loss, a more favourable value by 7.11 kPa. Physical-mechanical qualities of the analysed teat-cup liners were further used for the computer simulation of the teat-cup liners stress and strain tensor.

Keywords: tensile test; suction; closing stopper; reduced stress

Published: September 30, 2013  Show citation

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Karas I, Gálik R, Pogran Š, Šesták M. Computer simulation of the teat-cup liner stress and strain tensor. Res. Agr. Eng. 2013;59(3):114-119. doi: 10.17221/23/2012-RAE.
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