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An integrity analysis of washing machine holders
Nenad Gubeljak, Matej Mejač, Jožef Predan, 2007, izvirni znanstveni članek

Opis: The paper deals with structure integrity analysis of the holder for the carrying cross of a washing machine drum. Premature fracture of the holder occurred between mechanical sustainable tests of washing machine in the factory. In order to prevent fracture, the task was to determine the reasons for premature fracture of the holder and to estimate the suitability of the new design of the holder cross. Input data for structure integriry analysis were obtained by material by mechanical testing of used materials. Stress and strain analysis of holder limit load was performed by finite element modeling of holder. Dynamic tests of holders with two different thicknesses were done on a servo-hydraulic machine in order to find dynamical strength and endurance of holder. Fracture behaviour of holders is defined as initiation and propagation of crack. The obtained behaviour confirmed that the new design of holders reduces stress concentration in the critical region. Consequently, the new holder subjected to the same dynamic load can endure a higher number of cycles until breakage. The total number of cycles overcomes industrial testing requirements.
Ključne besede: lomna mehanika, visokociklično utrujanje, preizkušanje lomne žilavosti, nosilci kadi pralnega stroja, mejna obremenitev, ocena celovitosti konstrukcije, fracture mechanics, high cycle fatigue, fracture toughness testing, washing machine holders, washing machine drums, structure integrity assessment, limit load
Objavljeno: 10.07.2015; Ogledov: 544; Prenosov: 45
.pdf Celotno besedilo (517,04 KB)
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3.
The influence of physico-chemical parameters on water scale precipitation on washing machines' heaters
Danijela Urbancl, Darko Goričanec, Jurij Krope, 2007, strokovni članek

Opis: The paper presents the results of analysis of physico - chemical parameters influence on the intensity of water scale precipitation on washing machines heaters. Washing machines of the same producer were, to this end, modified to an endless cycle of washing with the same amount of cotton fabric at the same conditions. On the basis of various experiments it was determined that water hardness, the amount of exceeded carbon dioxide, water turbulence around the heater, the amount of cotton fibres in water exceeded from fabrics, and heater specific heat strength have the key role in water scale building up in washing machines heaters.
Ključne besede: magnetic water treatment, magnetic hydrodynamics, water scale, calcium carbonate, scale prevention, washing machine, electrical heater
Objavljeno: 21.12.2015; Ogledov: 563; Prenosov: 36
.pdf Celotno besedilo (544,97 KB)
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