Auxetic springs for seating


Abstract: It is commonly believed that furniture spring systems are far more durable and friendly to use than foam systems. The aim of this research project was to design and realise models of individual auxetic compression springs and determine their resistance to cyclic as well as prolonged static loads. The study was conducted using numerical calculations and verification of results by laboratory experiments. The results of the performed investigations made it possible to conclude that the designed spring had stiffness characteristics similar to the compression characteristics of polyurethane foams. Cyclical and prolonged static loads have no significant influence on changes in spring heights; their impact on the comfort of seating is insignificant. New construction of springs guaranteed the auxetic properties of systems made up of many parallel-joined spring systems. Due to such properties, seats designed using auxetic springs can exhibit high comfort levels in comparison with traditional systems made of wire springs or foams.

Keywords: Auxetic structures, numerical analysis, seating, silicon model, spring

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