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JWJ > Volume 30(6); 2012 > Article
Journal of KWJS 2012 December;30(6) :80-85.
Published online December 23, 2012.
doi:https://doi.org/10.5781/KWJS.2012.30.6.80
A Study on the Measurement of Stress Intensity Factors for the Fatigue Crack Propagation
Dong-Jin Oh*, Myung-Hyun Kim*
*Dept. of Naval Architecture and Ocean Engineering, Pusan National University, Busan 609-735, Korea
Correspondence: Myung-Hyun Kim  Email: kimm@pusan.ac.kr
  Published online December 23, 2012
ABSTRACT
Fatigue cracks in structural components are the most common cause of structural failure when exposed to fatigue loading. In this respect, fatigue crack detection and structural health assessment are very important. Currently, various smart materials are used for detecting fatigue crack and measurement of SIFs(Stress Intensity Factors). So, this paper presented a measurement of SIFs using MFC(Micro Fiber Composite) sensor which is the one of the smart material. MFC sensor is more flexible, durable and reliable than other smart materials. The SIFs of Mode Ⅰ(KⅠ) as well as Mode Ⅱ(KⅡ) based on the piezoelectric constitutive law and fracture mechanics are calculated. In this study, the SIF values measured by MFC sensors are compared with the theoretical results.
Keywords: Fatigue crack | SIFs(Stress Intensity Factors) | Piezoeletric effect
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