Failure Analysis of a Damaged Helicopter Rescue Hoist Cable

Teresa L.M. Morgado; Armando Sousa Brito; Carlos M. Branco

doi:10.4028/www.scientific.net/MSF.730-732.325

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HomeMaterials Science ForumMaterials Science Forum Vols. 730-732Failure Analysis of a Damaged Helicopter Rescue...

Failure Analysis of a Damaged Helicopter Rescue Hoist Cable

Abstract:

This paper presents the results and main conclusions of a study made to analyze the cause of failure occurred with an austenitic 304 class stainless steel wire rope of a helicopter rescue hoist. The cable is made up of 19 strands, 12 outside and 7 inside. As each strand contains 7 wires, the whole cable is made up of 133 wires. The study includes the chemical and microstructural characterization of the material, as well as the determination of its hardness, mechanical properties and the fractographic analysis by scanning electron microscopy (SEM). Tensile tests were performed for three velocities simulating different work conditions: 250mm/min, 50mm/min and 5mm/min. The fractographic analysis shows that the cable suffered lateral loss of material due to friction and leading to the failure of the remaining material by ductile mode.

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Periodical:

Materials Science Forum (Volumes 730-732)

Pages:

325-330

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.730-732.325

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Online since:

November 2012

Authors:

Teresa L.M. Morgado, Armando Sousa Brito, Carlos M. Branco

Keywords:

Abrasion, Failure Mode, Microvoid Coalescence, Rescue Hoist Cable

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References

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