Indigenous Technology of Soft Body Armour for Defence Applications Using 3D Woven Aramid Fabrics

Animesh Laha, Student of the Indian Institute of Technology, Delhi received the Gandhian Young Technological Innovation Award-2017 for developing a prototype of Indigenous Technology of Soft Body Armour for Defence Applications Using 3D Woven Aramid Fabrics. He carried his project under guidance of Dr. Abhijit Majumdar. 

Soft body armours are developed by using multiple layers of high performance fabrics. Generally, 30-40 layers of 2D fabrics woven aramid fabrics (Kevlar, Technora etc.) or ultrahigh molecular weight polyethylene (UHMWPE) sheets are assembled together to make soft armour panel which becomes heavy and inflexible. In this innovation, two approaches have been amalgamated to reduce the weight of body armour. 3D fabrics, in which yarns are arranged in three perpendicular directions, namely X, Y and Z were produced in the laboratory. 3D fabrics were then treated with shear thickening fluid (STF).

STF treated 3D fabric prototypes developed in this research have been tested against 9 × 19 mm bullets (430 m/s). Soft armour panel having STF treated 3D fabrics stopped bullets fired at 430 m/s. The areal density of the panels was 4500 g/m square. Moreover, the depth of back face signature for these fabrics was varying from 31 to 39 mm which is within the acceptable limit (44 mm). The panel containing STF treated 3D fabric showed dome formation, crack generation and fibre breakage to a lesser extent as compared to those of fabric panels containing untreated 3D fabrics.

Dr. R A Mashelkar, Chairperson, Research Advisory Committee, SRISTI and NIF, honored Animesh Laha, Department of Textile, Indian Institute of Technology, Delhi, with the prestigious Gandhian Young Technological Innovation (GYTI) Award 2017  at a function held at Rashtrapati Bhavan on March 5.

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