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Indetermined chair frames of ash wood
Linköping University, Department of Mechanical Engineering, Energy Systems. Linköping University, The Institute of Technology.
1997 (English)In: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 55, no 2-4, 255-259 p.Article in journal (Refereed) Published
Abstract [en]

During recent years more interest has been emphasised on wood as a construction material. This is so because wood is a renewable resource and also because problems with waste do not emerge when the wooden structure is taken out of operation. On the contrary this waste is still a resource even if the structure is demolished. Wood could always be used as a biomass fuel which is not expected to contribute to the greenhouse effect. In Sweden most of the interest has been emphasised on our conifers while broad leaved species are much less examined. This paper shows the result from the Finite Element Method applied on indetermined chair frames and compares these findings with actual testing in our laboratory. The conclusion is that there are considerable discrepancies between calculations and real behaviour even for relatively simple structures such as a chair frame. It seems that the real chair is stronger than expected even if the joints between the furniture members must reduce the overall strength found by the FEM calculations.

Abstract [de]

Das Interesse an Holz als Konstruktionsmaterial ist in den letzten Jahren deutlich gestiegen einmal, weil es sich um einen erneuerbaren Rohstoff handelt, zum andern weil damit weniger Probleme bei der Entsorgung verbunden sind. Diese Abfälle stellen sogar immer noch eine Energiequelle dar, die keinen zusätzlichen Treibhauseffekt verursacht. In Schweden liegt das Hauptinteresse bei den dort überwiegend vorhandenen Nadelhölzern, während Laubholz bisher weniger untersucht ist. In dieser Arbeit werden Berechnungen an unbestimmten Stuhlrahmen aus Eschenholz verglichen mit entsprechenden Labortests. Es zeigten sich erhebliche Unterschiede zwischen den Ergebnissen der FEM-Berechnungen und den Testergebnissen auch bei diesen relativ einfachen Strukturen. Reale Stühle scheinen wesentlich stabiler zu sein als nach der Rechnung zu erwarten ist, obwohl die Verbindungen zwischen den Möbelteilen die Festigkeit noch weiter gegenüber der Idealrechnung der FEM reduzieren sollten.

Place, publisher, year, edition, pages
Springer, 1997. Vol. 55, no 2-4, 255-259 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-75092DOI: 10.1007/BF02990558OAI: oai:DiVA.org:liu-75092DiVA: diva2:503650
Available from: 2012-02-16 Created: 2012-02-16 Last updated: 2017-12-07

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Gustafsson, Stig-Inge

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