Tubular reinforcing elements for energy absorbing composites

Kulkarni, AG and Pai, BC and Balasubramanian, N (1983) Tubular reinforcing elements for energy absorbing composites. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

Tubular reinforcing elements for composites were made by infiltrating molten aluminum alloy into the core of a brass/stainless steel capillary tube containing a helical nichrome/stainless steel wire Coil. These duplex elements gave larger ductility in tension compared with the individual components of the elements. The surface ripples on the tested samples suggested that the cumulative deformation of the sheath was responsible for the observed ductility. The ductility of these tubular elements increased with the increase in the ratio of reinforced coil length to the tube length upto the value of about 1.5. However further increase in the ratio of the reinforced coil length to the tube length decreased the ductility. A closely wound helical coil reinforcement gave very low ductility and no surface13; ripples was observed on the tested samples. Composites13; reinforced with the tubular elements gave 3 to 10 times13; higher percentage elongation compared to the straight13; wire reinforced composite with marginal decrease in the13; ultimate tensile strength.

Item Type:	Monograph (Technical Report)
Uncontrolled Keywords:	Tubular reinforcing elements;Stainless steel;Ductility;Helical coil
Subjects:	CHEMISTRY AND MATERIALS > Composite Materials
Depositing User:	M/S ICAST NAL
Date Deposited:	06 Nov 2006
Last Modified:	24 May 2010 04:22
URI:	http://nal-ir.nal.res.in/id/eprint/3179

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