Comparison of Horizontal Stiffness in Wheelchair Seat Cushions by Construction Material

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This study investigates local horizontal stiffness across different construction materials for wheelchair seat cushions, including viscous fluid (n=5), air cells (n=7), elastic/viscoelastic foam (n=4), and honeycomb (n=3). Results indicated that local horizontal stiffness varied significantly by material (p=0.007), while no significant differences were observed for overall horizontal stiffness (p=0.29) or ISO 16840-2 stiffness (p=0.14). Understanding these variations can help in the design of more effective wheelchair cushions for improved user comfort and pressure distribution.

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Dec 08, 2025

1 horizontal stiffness 2 construction materials 3 seat cushions 4 wheelchair design 5 viscoelastic foam 6 air cells 7 honeycomb structure 8 rehabilitation engineering text

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Comparison of Horizontal Stiffness in Wheelchair Seat Cushions by Construction Material

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Figure 4. Horizontal stiffness by material of construction: viscous fluid (n = 5), air cell (n = 7), elastic/VE foam (n = 4), and honeycomb (n = 3). (a) Local horizontal stiffness was significantly different by material of construction (p = 0.007) and no significant difference was found for (b) overall horizontal stiffness (p = 0.29) or (c) International Organization for Standardization (ISO) 16840-2 stiffness (p = 0.14). VE = viscoelastic. Akins JS, Karg PE, Brienza DM. Interface shear and pressure characteristics of wheelchair seat cushions. J Rehabil Res Dev. 2011;48(3):203-12.DOI:10.1682/JRRD.2009.09.0145

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