PSI - Issue 60

624 Varsha Florist et al. / Procedia Structural Integrity 60 (2024) 614–630 Varsha Florist, Santhoshkumar R, A. Vamsi, Sajju V, Sarath Mohan, Sanjeev Kumar, Dhanoop A, Venukuttan C, M.K. Sundaresan, SVS Narayana Murty / Structural Integrity Procedia 00 (2024) 000 – 000 11

Fig. 11. Burst tested 15-5PH full scale tank, failure in the 4.2mm cylindrical shell region was observed.

The failure location in 4.2mm thick cylindrical shell membrane region was similar to that of subscale tank and was observed at 17.25 MPa against predicted burst pressure of 17.65MPa (from Svensson criteria for realized property of YS-1286 MPa, UTS-1318 MPa, % el. – 9.6) as shown in Fig. 11. Failure location was similar to subscale pressure vessel In each cycle of MEOP/proof pressure, repeatability of the measured values of strains was as expected. At proof pressure, good match was observed between predictions and test results, at all locations, as shown from Fig. 12. Linearity was observed in all the strain gauges up to proof pressure. Comparison between predictions and test results is given in Table-3. Hoop and meridional strains upto burst is shown in Fig. 13.

1000 1500 2000 2500 3000 3500 4000 STRAIN (microstrain) L1_at Control Location H1_at Control Location L2_at Centre of 10mm thk. Ring H2_at Centre of 10mm thk. Ring L3_at center of FE Dome H3_at center of FE Dome L4_at center of AE Dome H4_at center of AE Dome

L5a_on A side of FE Dome to cyl. shell weld H5a_on A side of FE Dome to cyl. shell weld L5b_on B side of FE Dome to cyl. shell weld H5b_on B side of FE Dome to cyl. shell weld L6a_on A side of AE Dome to cyl. shell weld H6a_on A side of AE Dome to cyl. shell weld L6b_on B side of AE Dome to cyl. shell weld H6b_on B side of AE Dome to cyl. shell weld

0 500

0

2

4

6

8

10

PRESSURE (MPa)

Fig. 12. Hoop (H) and meridional (L) strain at different locations on full scale tank