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http://dx.doi.org/10.5781/KWJS.2011.29.3.332

A Study of Stress Intensity Factors using Micro Fiber Composite Sensors  

Oh, Dong-Jin (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
Kim, Myung-Hyun (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
Publication Information
Journal of Welding and Joining / v.29, no.3, 2011 , pp. 76-81 More about this Journal
Abstract
Recently, the structural failures due to fatigue occur frequently with the increase of size of ships and offshore structures. In this respect, the assessment of fatigue life and the residual strength are very important. Currently, the smart materials technology has demonstrated a variety of possibilities for a diagnosis of structural strength and structural health condition for large structures. The benefits and feature of the MFC sensor are more flexible, durable and reliable than conventional smart material. In this study, Micro Fiber Composite (MFC) sensor for the measurement of stress intensity factor (SIF) of two dimensional cracks induced in a structure is developed. Two MFC sensors are placed in the vicinity of the crack tip close to each other with the crack tip in between them. The SIFs of Mode I($K_I$) as well as of Mode II($K_{II}$) 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 and measured value.
Keywords
MFC sensor; Stress intensity factor(SIF); Fatigue crack growth; Piezoelectric;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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