Strain gauge capabilities in crack detection

Jarkko Tikka, Risto Hedman, Aslak Siljander

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

21 Citations (Scopus)


Part of the structural inspections done to modern military aircraft can be technically replaced by automatic structural health monitoring systems (SHMS). One option for the system’s sensor is traditional strain gauge, whose capabilities in structural damage detection were evaluated. A series of finite element analysis were done according to different damage cases in order to predict the output of strain gauge in crack affected area. Results from two fatigue tests have been used to test the strain gauge and prediction tool capabilities in real structural damage cases. The experience gained showed noteworthy potential for the strain gauge based SHMS to be further developed into a flying prototype, as the formation and growth of fatigue cracks could be detected early enough in view of maintaining the flight safety. Biggest problems to be solved are in areas of damage size classification.
Original languageEnglish
Title of host publicationStructural Health Monitoring 2003
Subtitle of host publicationFrom Diagnosis & Prognostics to Structural Health Management
EditorsFu-Kuo Chang
PublisherDEStech Publications Inc.
Number of pages8
ISBN (Print)978-1-932078-20-6
Publication statusPublished - 2003
MoE publication typeA4 Article in a conference publication
Event4th International Workshop on Structural Health Monitoring - Stanford, United States
Duration: 15 Sept 200317 Sept 2003


Conference4th International Workshop on Structural Health Monitoring
Country/TerritoryUnited States


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