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Dynamic Optical Investigations of Hypervelocity Impact Damage

[+] Author Affiliations
Leslie E. Lamberson, Ares J. Rosakis

California Institute of Technology, Pasadena, CA

Paper No. IMECE2009-11740, pp. 43-44; 2 pages
doi:10.1115/IMECE2009-11740
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 1: Advances in Aerospace Technology
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4374-1 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

Hypervelocity impact is a rising concern in spacecraft missions where man-made debris in low-earth orbit as well as micrometeroids have the potential to damage not only the structural components, but also the optical, electrical, and thermal components of a space asset. Little has been investigated regarding damage mechanisms and dynamic fracture mechanics resulting from a hypervelocity impact in-situ. Two optical techniques, the methods of photoelasticity and caustics, in conjunction with high-speed photography are used to examine stress waves from impact of unloaded plates, as well as pre-cracked and pre-loaded plates in tension. The resulting photographs are analyzed to extract information regarding stress wave interactions, crack speeds and the dynamic stress field ahead of the moving cracks.

Copyright © 2009 by ASME

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