Author(s)

K. Minoshima, K. Tsuru & K. Komai

Abstract

This paper presents the influence of vacuum and water absorption on the tensile fracture behaviour of four different types of aramid fibres: Kevlar 29. Kevlar 49 and Kevlar 149. manufactured by DuPont and Technora by Teijin Co. Ltd Single fibre tensile tests were conducted in air and in vacuum for fibres preconditioned in air, water at SOT for two months and in vacuum for about four hours The mechanical properties of aramid fibres, longitudinal elastic modulus and fracture strength, decreased by water absorption. The fibre fracture was associated more with fibre splitting, when preconditioned in water. When tested in vacuum, the air-preconditioned fibre strength decreased form that conducted in air. Moreover, the str

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