Pahlevanpour, AmirhosseinMarzbanrad, BaharehBehravesh, Seyed BehzadJahed, Hamid2018-11-092018-11-09May-18978-1-77355-023-7http://hdl.handle.net/10315/35396http://dx.doi.org/10.25071/10315/35396Notches are inevitable in many components and structures due to design limitations. In addition, they are the locations for stress concentration and are susceptible to fatigue failure. As a result, the cyclic stress/strain response at a notch is of key importance. Fiber Bragg Grating (FBG) sensors have been successfully utilized for mechanical and thermo-mechanical strain measurement in many cases; nevertheless, their capability of measuring strain at spots with intensive stress/strain has not yet been explored. In this research, FBG sensors are employed for strain measurement at the notch tip. A verification test was designed to substantiate the FBG measurements. The test involves a rectangular magnesium sheet with a center hole, subjected to uniaxial cyclic loading while the strain was measured at the notch tip using three different methods: strain gage, digital image correlation (DIC), and FBG. There were good agreements between the three measurements.enThe copyright for the paper content remains with the author.Engineering Analysis & DesignMaterials TechnologyNotchStrain measurementFBGDICArticle