AbstractThe impact resistance of unstretched fibers of nylon 6 has been measured at impact velocities in the range of 10–20 m/sec by means of a freely falling dart of variable weight. The analysis was made on fibers with a high moisture content, since samples with low moisture content were brittle, as were unstretched fibers of poly(ethylene terephthalate). The observed impact behavior is in line with that predicted by the stress–strain curves obtained on a dynamometer, although it deviates somewhat in the ultimate properties and when the extent of deformation is small. The behavior for small deformation is discussed and a model is propo
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