Effects of Mechanical Properties of Fabrics on Clothing Pressure

To investigate how elastic modulus, elongation and relaxation time of fabric influence clothing pressure, the pressure on cylinder model was measured. The fabrics used were cotton spandex and polyester spandex elastic knitted fabric. The fabrics were sewed as 100mm high cylinders. The fabric cylinders with different elongation and with elongation 20% at different relaxation time pressed the cylinder model, and the pressure was measured. By analyzing data, it was found that clothing pressure increases linearly with the increase of fabric elongation basically when fabric elongation was within 60% . The clothing pressure exerted by fabric whose elastic modulus is greater is generally higher than that by fabric whose elastic modulus is lower when elongation was the same. The clothing pressure presents a trend of first order exponential decay with the passage of relaxation time, and the main pressure decrease happens within the first 30 minutes, subsequently, the pressure decreases slowly and tends to be stable ultimately. And the decrease caused by relaxation properties of fabric accounts for a little of total pressure.

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W artykule badaniom poddano cylindryczny model, wykonany z różnych rodzajów materiału. Oceniono wpływ współczynnika elastyczności, czas wydłużenia i ściągnięcia na ciśnienie wywierane przez tkaninę. Analiza danych wykazała, że wywierane ciśnienie rośnie liniowo wraz ze wzrostem wydłużenia, zwłaszcza do 60%. Ponadto jego zanik ma charakterystykę wykładniczą pierwszego rzędu a główny spadek następuje w ciągu pierwszych 30 min potem opada wolno.