Use of the VibTex vibration system for testing textiles

Principal objective of this paper is a description of a special testing device (VibTex). This device allows testing of textile materials (threads, samples of fabrics, etc.) during cyclical stress at a high frequency. Control of the VibTex allows harmonic and non-harmonic elongation of the textile samples. Results of the tests with harmonic elongation can be used for calculations of the dynamic characteristics of textile samples. In the final part of the paper, values of the dynamic modulus and loss angles are determined at frequencies of 10 Hz and 100 Hz for various yarns.