Test for the auxetization of chosen polyurethane foams used in the production of seat bases for upholstered furniture
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2015, Vol 92, Issue
Abstract
Test for the auxetization of chosen polyurethane foams used in the production of seat bases for upholstered furniture. The main purpose of the thesis was to perform an attempt of auxetic process of the foams and to determine the level of susceptibility of the selected foams to thermal modification of resilient properties. The research has been conducted on the basis of methodology consisting in: ‒ selecting materials for the research, ‒ measuring the Poisson’s ratio, ‒ performing an attempt of the auxetic process of the selected polyurethane foams. The research has been carried out with the use of numerically controlled testing machine Zwick 1445, DIC system for digital image correlation, Pc54k furnace by WARMA, special form for the auxetic process of foams and by means of the mFlex sensor mat for measuring and reading contact stresses. On the basis of the performed research, an analysis of the obtained results have been conducted and conclusions have been drawn up. It has been found that thermal modification in connection with a uniaxial compression of material has not led to the auxetic process of foams. It has been found that the selected type of polyurethane foams is not susceptible to the auxetic process.
Authors and Affiliations
ŁUKASZ MATWIEJ, Iwona Wiaderek, KRZYSZTOF JANKOWSKI
Keywords
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