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- Title
Auxetic Textile and its Applications.
- Authors
Umakiran, T.; Kumar, A. Anil
- Abstract
When a material is stretched there is an accompanying reduction in width. A measure of this dimensional change can be defined by Poisson's ratio, v = -εx/εy. For many materials this value is positive and reflects a need to conserve volume. Auxetic materials, those with a negative Poisson ratio (NPR), display the unexpected property of lateral expansion when stretched, with an equal and opposing densification when compressed. Commonly, the tensile strength and modulus of these polymers is poor. The problem here is one of scale: an open microscopic structure confers inferior mechanical properties. To impart superior mechanical properties, auxetic structure must exist at the molecular level. The main in was to advance scientific understanding of molecular-level NPR effects. This molecular approach should overcome property limitations inherent in existing polymers with auxetic microstructures. Initially, the molecular-level requirements for auxetic fibers that may ultimately furnish a man-made material suitable for extrusion and spinning on a commercial scale. These auxetic textiles are used in many areas like biomedical field, filters, piezoelectric sensors and actuators, medical field, seat belts and safety harness in automobiles, ballistic protection, reinforcement composites and etc. Auxetic meaning and its various structures and its various applications are explained in detail in this paper.
- Subjects
STRETCH woven textiles; STRETCH yarn; ELASTIC textiles; MECHANICAL behavior of materials; POISSON'S ratio; INDUSTRIAL textiles; TEXTILES
- Publication
Man-Made Textiles in India, 2009, Vol 52, Issue 8, p265
- ISSN
0377-7537
- Publication type
Article