Dynamic modulus and strain wave velocity in ballistic fibre strands

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• 作者：Menghe Miao
• 刊名：Journal of Materials Science
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：51
• 期：12
• 页码：5939-5947
• 全文大小：940 KB
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• 作者单位：Menghe Miao (1) (2)
  
  1. CSIRO Manufacturing, PO Box 21, Belmont, VIC, 3216, Australia
  2. Defence Materials Technology Centre, Hawthorn, Australia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

Strain wave propagation velocity in fibre materials is a primary consideration in the design of body armours for ballistic protection. In this paper, we compare the strain wave propagation (sonic) velocities and moduli of parallel and twisted ballistic fibre strands (yarns) derived from quasi-static tensile test and strain wave pulse test. In parallel multifilament yarns, the individual fibres behave independently from each other, and the yarn sonic velocities and moduli derived from the two test methods match each other very closely. In yarns with a twisted structure by twisting multifilament yarn or by spinning short fibres, fibres in the yarns are compressed against each other and fibre-to-fibre friction plays a significant role. Consequently, the yarn sonic velocities and moduli determined by the strain wave pulse method are significantly greater than that derived from the quasi-static tensile method.