The Mechanisms of fatigue failure in Ti-6Al-2Sn-4Zr-6Mo forged discs are investigated: the effects forging and machining operations on decoupled. A four-point bend testing approach enabled crack initiation propagation characteristics to be studied at multiple locations around disc periphery. Fatigue performance variation (of ~60%) different positions, behaviour were linked heterogeneous crystal...

The integrity assessment to evaluate the safety margin of reactor pressure vessels (RPV) often considers only crack initiation and excludes propagation analysis. This contribution focuses on analysis in RPV steels. eXtended Finite Element (XFEM) method implemented ABAQUS is applied a thick-walled cylindrical specimen with circumferential at inner surface order simulate embrittled subjected Pres...

In this paper, the propagation of time-harmonic torsional waves in composite elastic cylinders is investigated. An imperfect interface is considered where tractions are continuous across the interface and the displacement jump is proportional to the stress acting on the interface. A frequency equation is derived for the rod and dispersion curves of normalized frequency as a function of normaliz...

Ultrasonic fiber optic sensors (UFOS) based on Mach-Zehnder (M-Z) interferometer is proposed to detect guided waves propagating in the pipe, which is common structural component in aerospace, mechanical or civil structures. The sensitivity of UFOS depends on the long sensing distance, while winding around the circumferential direction of the pipe provides arbitrary sensing length as well as sma...