Title page for ETD etd-07082002-224733


Type of Document Master's Thesis
Author Peairs, Daniel M.
Author's Email Address dpeairs@vt.edu
URN etd-07082002-224733
Title Development of a Self-Sensing and Self-Healing Bolted Joint
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Inman, Daniel J. Committee Chair
Leo, Donald J. Committee Member
Park, Gyuhae Committee Member
Keywords
  • bolted joint
  • shape memory alloy
  • self-healing
  • impedance method
  • structural health monitoring
  • smart structures
Date of Defense 2002-07-03
Availability unrestricted
Abstract
A self-sensing and self-healing bolted joint has been developed. This concept encompasses the areas of health monitoring, joint dynamics and smart materials. In order to detect looseness in a joint the impedance health monitoring method is used. A new method of making impedance measurements for health monitoring that greatly reduces the equipment cost and equipment size was developed. This facilitates implementation of the impedance technique in real-life field applications. Several proof of concept experiments are presented and compared to the traditional method of making impedance measurements.

Investigations of bolted joint dynamics were conducted. A literature review of bolted joints and their diagnostics is presented. The application of the transfer impedance method is compared to standard modal tests on various bolt tensions. An investigation of damping in bolted joints was also made comparing a bolted and monolithic beam.

Practical issues in adaptive bolted joints are investigated. This includes issues on activating/heating SMA actuators, connecting the actuators to the power source, size selection of SMA actuators and insulations. These issues are examined both experimentally and theoretically.

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  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
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  01CoverandAbstract.pdf 53.42 Kb 00:00:14 00:00:07 00:00:06 00:00:03 < 00:00:01
  02Acknowledgements.pdf 49.19 Kb 00:00:13 00:00:07 00:00:06 00:00:03 < 00:00:01
  03TableofContents.pdf 64.98 Kb 00:00:18 00:00:09 00:00:08 00:00:04 < 00:00:01
  04Chapter1.pdf 348.97 Kb 00:01:36 00:00:49 00:00:43 00:00:21 00:00:01
  05Chapter2.pdf 711.13 Kb 00:03:17 00:01:41 00:01:28 00:00:44 00:00:03
  06Chapter3.pdf 315.81 Kb 00:01:27 00:00:45 00:00:39 00:00:19 00:00:01
  07Chapter4.pdf 401.06 Kb 00:01:51 00:00:57 00:00:50 00:00:25 00:00:02
  08Chapter5.pdf 60.23 Kb 00:00:16 00:00:08 00:00:07 00:00:03 < 00:00:01
  09References.pdf 83.13 Kb 00:00:23 00:00:11 00:00:10 00:00:05 < 00:00:01
  10AppendixA.pdf 75.65 Kb 00:00:21 00:00:10 00:00:09 00:00:04 < 00:00:01
  11Vita.pdf 48.00 Kb 00:00:13 00:00:06 00:00:06 00:00:03 < 00:00:01

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