Experimental Study on Mechanical Properties of Polyethylene HDPE in Conditions of Hydraulic Impact Simulation

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Experimental research on mechanical properties of hardened polyethylene HDPE, is developed in the paper. The conditions of hydraulic impact simulation, caused by sudden opening or closing of the valve or by working pomp were adopted in the model. The created in such conditions shock wave moves at a high speed causing additional dangerous dynamic loadings, which lead to faster pipe wear process. The aim of this study is to determine Young's modulus of the pipe material in the cyclic load conditions. The assumed amplitude and frequency of the applied load relates to variation of the impact wave pressure also the speed of the disturbances propagation are taken from experimental measurement of the real water hammer. The measured Young's modulus is higher than that obtained from a static tensile test. The presented study arises from the need to verify the actual value of pipe material mechanical properties, i.e. longitudinal stiffness, for designing of hydraulic pipes under conditions of water hammer.

Info:

Periodical:

Solid State Phenomena (Volume 240)

Edited by:

Pawel Pyrzanowski and Jacek Gadomski

Pages:

149-154

Citation:

S. Imiełowski et al., "Experimental Study on Mechanical Properties of Polyethylene HDPE in Conditions of Hydraulic Impact Simulation", Solid State Phenomena, Vol. 240, pp. 149-154, 2016

Online since:

August 2015

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$38.00

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[1] H. Ramos, B.A. de Almeida, Parametric Analysis of Water Hammer Effects in Small Hydro Schemes, Journal of Hydraulic Engineering, vol. 128, No 7 (2002) 689-696.

DOI: https://doi.org/10.1061/(asce)0733-9429(2002)128:7(689)

[2] Jo. A. Ilin: Water supply reliability analysis, Stroizdat, Moscow, 1987, (in Russish).

[3] V.L. Streeter, B. E. Wylie, K.W. Bedford: Fluid Mechanics, WCB McGraw-Hill, New York, (1998).

[4] M. Niełacny: Transient Flow in Water Supply Networks, WPP, Poznań 2005, (in Polish).

[5] V. L. Streeter, B.E. Wylie, K.W. Bedford: Fluid Mechanics, WCB McGraw-Hill, New York, (1998).

[6] PN-EN ISO 527 – 1: Plastic materials. Evaluation of mechanical properties in the static tensile test. General principles.