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Proceedings of a Workshop on Materials State Awareness (2008) / Chapter Skim
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Session IV: Materials State Awareness Application Issues
Pages 31-36

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From page 31...
... Some of the key barriers to implementing structural state awareness methods are then described using specific applications in military ground vehicles, composite weapons systems, and rotorcraft. It is believed that many of these barriers to implementation involve materials state awareness solutions.
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From page 32...
... For longterm SHM, the output of this process is periodically updated information regarding the ability of the structure to continue to perform its intended function in light of the inevitable aging and degradation resulting from the operational environments. Under an extreme event, such as an earthquake or unanticipated blast loading, SHM is used for rapid condition screening.
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From page 33...
... In addition to the challenges described above, there are other nontechnical issues that must be addressed before SHM technology can make the transition from a research topic to actual practice. These issues include convincing system owners that the SHM technology provides an economic benefit over their current maintenance approaches of using quantified benefit-cost analyses, and convincing regulatory agencies that this technology provides a significant life-safety benefit.
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From page 34...
... . NIST scientists conducted careful indoor experiments designed to obtain fundamental understanding of the degradation processes of a model epoxy coating as a function of environmental conditions (temperature, humidity, and ultraviolet intensity and spectrum)
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From page 35...
... A final practical concern for a failure prediction methodology running in real time is the reliability of the sensors themselves. It is easy to imagine how faulty sensors could lead to either false alarms or failure to predict.
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Key Terms

  • materials state
  • damage detection
  • structural state
  • shm technology
  • structural health

  • incremental damage
  • health monitoring
  • damage evolution
  • damage prognosis
  • science community

  • fundamental understanding
  • ultrasonic transducer
  • degradation data
  • decision criterion
  • statistical process

  • damage mechanisms
  • physical state
  • multiphysics damage
  • structural monitoring
  • materials properties

  • involve materials
  • global damage
  • implementing structural
  • observed damage
  • versus structural

  • environmental data
  • cumulative damage
  • short research
  • process industries
  • key research


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