Mechanical Stresses Induced by Compression in Castings of the Load-carrying Grate
Autor: | B. Piekarski, J. Słowik, A. Drotlew |
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Rok vydání: | 2016 |
Předmět: |
Innovative Foundry Technologies and Materials
Materials science 020502 materials Grates Metals and Alloys Castings for Heat Treatment Plants 030206 dentistry 02 engineering and technology Compression (physics) Load carrying Industrial and Manufacturing Engineering 03 medical and health sciences 0302 clinical medicine 0205 materials engineering lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials Composite material |
Zdroj: | Archives of Foundry Engineering, Vol 16, Iss 2, Pp 51-54 (2016) |
ISSN: | 2299-2944 |
DOI: | 10.1515/afe-2016-0025 |
Popis: | The main aim of this study was to examine the compression-induced state of stress arising in castings of the guide grates during operation in pusher-type furnaces for heat treatment. The effect of grate compression is caused by its forced movement in the furnace. The introduction of flexible segments to the grate structure changes in a significant way the stress distribution, mainly by decreasing its value, and consequently considerably extends the lifetime of the grates. The stress distribution was examined in the grates with flexible segments arranged crosswise (normal to the direction of the grate compression) and lengthwise (following the direction of force). A regression equation was derived to describe the relationship between the stress level in a row of ribs in the grate and the number of flexible segments of a lengthwise orientation placed in this row. It was found that, regardless of the distribution of the flexible segments in a row, the stress values were similar in all the ribs included in this row, and in a given row of the ribs/flexible segments a similar state of stress prevailed, irrespective of the position of this row in the whole structure of the grate and of the number of the ribs/flexible segments introduced therein. Parts of the grate responsible for the stress transfer were indicated and also parts which play the role of an element bonding the structure. |
Databáze: | OpenAIRE |
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