PSI - Issue 60

9

S. S. Satpute et. al./ Structural Integrity Procedia 00 (2023) 000–000

S.S. Satpute et al. / Procedia Structural Integrity 60 (2024) 525–534

533

(b)

(a)

Fig. 9. (a) The variation of load vs time for a cyclic loading. (b) Prediction of crack growth for a pipe tested under cyclic loading.

Fig. 10. Crack growth vs. no. of loading cycles for the pipes tested under four-point bend loading

5. Conclusion Fracture tests on piping components to assess their structural integrity and crack growth behaviour under monotonic and cyclic loading conditions have been carried out on pre-cracked pipes of carbon /stainless steel at high temperature. An image acquisition system is developed in-house at BARC, for acquisition of images during ongoing fracture test. The software required for acquisition of data from various cameras during fracture experiments was also developed in house at BARC. During the entire test-duration, image sets of the load, load line displacement, CMOD, and both crack tip images have been acquired using this system at relevant loading-points. Subsequently, the crack tip images were processed manually to obtain the crack growth. The performance of the system was found to be satisfactory. The error in measurement of crack length was found to be less than 3% with respect to actual crack growth measured