Abstract
This article investigates the tensile and twist failure of mulberry and tasar silk filaments. The mulberry and tasar filaments were subjected to uniaxial loading on Instron tensile tester at different rate of extensions and gauge lengths. Furthermore, the number of turns to rupture the silk filaments was tested using a twist tester. The results showed that the mulberry filament has higher tensile and twist strength than that of tasar filament. The SEM photomicrographs of the region of fracture divulged that the tensile and twist failure of mulberry and tasar filaments take place in catastrophic and non-catastrophic modes, respectively.
Highlights
Silk fiber is recognized as queen among the textile fibres
The strength of any textile material is largely governed by two important testing parameters viz., extension rate and gauge length [4]
To the authors’ knowledge, no information is available on the effect of extension rate and gauge length on silk filament
Summary
Silk fiber is recognized as queen among the textile fibres. The history of silk fibre dates back to roughly 5000 years, since it remains an important luxurious textile material for its elegant aesthetic look [1]. Silk fibre has outstanding potentiality as a structural material because of its unique combination of strength and ductility compared to any other natural fibres. Despite of this fact, the reported work on the tensile failure mechanism of silk filament is not adequate [2,3]. The strength of any textile material is largely governed by two important testing parameters viz., extension rate and gauge length [4]. To the authors’ knowledge, no information is available on the effect of extension rate and gauge length on silk filament. Of silk filaments produced by two common silkworms, namely, mulberry (Bombyx mori) and tasar (Antheraea mylitta D.)
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