Naslov
Contact stresses between seat cushion and the human body. Comparison results of numerical calculation with sensor investigations

Autori
Smardzewski, Jerzy ; Prekrat, Silvana ; Pervan, Stjepan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Drvo je prvo – novi materijali, kvaliteta i dizajn proizvoda / Grbac, Ivica - Zagreb : Šumarski fakultet Sveučilišta u Zagrebu, 2009, 143-150

ISBN
978-953-292-012-3

Skup
20. jubilarno međunarodno znanstveno savjetovanje "Drvo je prvo – novi materijali, kvaliteta i dizajn proizvoda"

Mjesto i datum
Zagreb, Hrvatska, 16.10.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
seat cushion; human body; contact stresses; numerical analysis

Sažetak
Opti misati on of seat construction cushions is associated with the need to investigate their softness employing, for this purpose, various kinds of sensors. However, it is by no means apparent whether the widespread use of hard sensors instead of soft ones modelled to the shape and anatomically resembling parts of human body is justified. The aim of the performed investigations was: to determine seat cushion stiffness of a chair derived from a set of diningroom furniture, to determine values and distributions of contact strains on the seat surface caused by sensors of diff erent hardness, numerical calculation of contact strains between the seat cushion and the sensor and to verify the results of these calculations with the results of laboratory experiments. The performed trials showed that the seat cushion stiffness assessment and evaluation of contact stresses on their surface should be carried out employing an equally stiff sensor. In numerical calculations, polyurethane foams should be modelled as hyperfoam bodies of σ =f(ε ) characteristics determined in an axial compression test. Contact stresses between the seat cushion and the user’ s body should be reduced as a result of application of a frictionless connection of thin layers of polyurethane foams with foam forming the proper elastic layer of the seat.

Izvorni jezik
Engleski

Znanstvena područja
Drvna tehnologija

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