Metal matrix materials reinforced with shape memory fibers for e

Details Metal matrix materials reinforced with shape memory fibers for e Metal matrix materials reinforced with shape memory fibers for e

1997-12-08

2000-02-15

Jones, Deborah

Stock material or miscellaneous articles

All metal or with adjacent metals

Laterally noncoextensive components

428608, 428611, B32B 512

Patent

active

060250801

ABSTRACT:
Shape-memory fibers are incorporated into a metal matrix material with a level of fiber-to-matrix bonding so that upon localized failure of matrix under load, the strains in fibers debond them from the matrix to the extent that fibers do not all rupture at the location of matrix failure. The pull-out process of fibers ruptured away from the matrix failure location provides the composite material with substantially increased ductility and energy absorption capacity after localized failure of the matrix. Pre-tensioning of shape-memory fibers impose sustained stresses on matrix which enhance the strength and energy absorption capacity of the composite material. The shape-memory fibers may be incorporated into a metal matrix at their end so that fibers pull out from the matrix under load and provide an energy-absorbing assembly.

REFERENCES:
patent: 5508116 (1996-04-01), Barrett
patent: 5611874 (1997-03-01), Zadno-Azizi et al.
patent: 5614305 (1997-03-01), Paine et al.
Shaw, J.A. and Kyriakldes, S., "Material Characterization of Niti Shape Memory Alloys: I Experiments," AMD-vol. 200/MD-vol. 57, Plastic and Fracture Instabilities in Materials, ASME, 1995, pp. 81-84.

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