PSI - Issue 60

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 17

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• The complete set of test data consisting of flow formed shells and weld properties were analyzed and found that the specified yield and ultimate strength values were achieved in all the shells with minor reduction in percentage elongation. • Further, fractography studies were also performed on specimens extracted from both the circumferential and longitudinal fracture edges of the burst tested hardware. • Mass of the redesigned tank with 15-5 PH steel is 394 kg, against total mass of the existing AFNOR 15CDV6 tank of approximately. 600 kg. Hence, there is 34% reduction in mass of each tank, thereby total mass saving per mission is ~ 400 kg. • Decrease in mass per tank leads to the payload gain of approx. 7.5 kg. Hence, the overall payload gain per mission for the two tanks is ~15 kg. Hence, this new version of pressure vessel is qualified for induction into the up-coming launch vehicle missions. References A. P. Beena, M. K. Sundaresan& B. Nageswara Rao, Destructive tests of 15CDV6 steel rocket motor cases and their application to lightweight design, 1995 Elsevier Science Limited. V. Diwakar, S. Arumugham, T.S. Lakshmanan, B.K. Sarkar, Fracture characteristics of a burst tested maraging steel rocket motor case, Journal of Materials Science 20 (1985) Chitaranjan Pany, Structural Analysis of Metallic Pressure Vessels with Weld Sinkage in the Circumferential Joint, Journal of Scientific, Technology and Engineering Reasearch (2021). K. M. Rajan, D.U. Deshpande, K. Narasimhan, Experimental studies on bursting pressure of thin-walled flow formed pressure vessels, IIT Bombay-400 076. Pressure Vessel Design Manual, Third Edition, Dennis R Moss, Elsevier. Abhay K. Jha, K. Sreekumar a, P.P. Sinha, Metallurgical failure analysis of the 560 mm dia 0.15C – 1.25Cr – 1Mo – 0.25V steel pressure vessel, Engineering Failure Analysis 17 (2010) 802 – 809. C Pany, Malli Krishnamoorthy Sundaresan, B. Nageswara Rao, BhagavatheeswaraSivasubramonian, N. Jayachandran Nair, On the bursting of an HSLA steel rocket motor case during proof pressure testing, Research Gate article- Oct 2012. Christopher, T., Rama Sarma, B. S. V., Govindan Potti, P. K., Nageswara Rao, B., and Sankarnarayanasamy, K., 2002, A Comparative Study on Failure Pressure Estimations of Unflawed Cylindrical Vessels, Int. J. Pressure Vessels Piping, 79, pp. 53 – 66. AseerBrabin, T., Christopher, T., and Nageswara Rao, B., 2011, Bursting Pressure of Mild Steel Cylindrical Vessels, Int. J. Pressure Vessels Piping, 88, pp. 119 – 122. T Christopher, K. Sankarnarayanasamy, B. N. Rao, Fracture behaviour of maraging steel tensile specimens and pressurized cylindrical vessels, Fatigue FractEngng Mater Struct (2004) 27, 177-186. Heckman, D. and Davis, D. A.1998, Finite Element Analysis of Pressure Vessel, MBARI pp. 1 – 7. Svensson, N. L.1958, Burst Pressure of Cylindrical and Spherical Vessels, ASME J. Appl. Mech.0021-8936, 25, pp. 89 – 96. M. Runge (D.H. Pollitt, Trans), Spinning and Flow forming., Leifeld Metal Spinning, 1993. Khayatzadeh, Saber and Moturu, Shanmukha Rao and Kelleher, Joe F. and Rahimi, Salah (2017) Development of process induced residual stress during flow forming of tubular 15-5 martensitic stainless steel, ASME Pressure Vessels & Piping Conference 2017, 2017-07-16 - 2017-07- 20. LipingXue,G. E. O. Widera, Zhifu Sang, Burst Analysis of Cylindrical Shells, J. Pressure Vessel Technol. Feb 2008, 130(1): 014502. AseerBrabin, T., Christopher, T., and Nageshwara Rao, B., 2010, Finite Element Analysis of Cylindrical Pressure Vessels Having a Misalignment in a Circumferential Joint, Int. J. Pressure Vessels Piping, 87, pp. 197 – 201. Diamantoudis, Th., and Kermanidis, Th., 2005, Design by Analysis Versus Design by Formula of High Strength Steel Pressure Vessel: A Comparative Study, Int. J. Pressure Vessels Piping, 82, pp. 43 – 50 Subhananda Rao, A., Venkata Rao, G., and Nageshwara Rao, B., 2005, Effect of Long Seam Mismatch on the Burst Pressure of Maraging Steel Rocket Motor Cases, Eng. Failure Anal., 12, pp. 325 – 336. Rajan, K. M., 2002, Experimental Studies on Bursting Pressure of Thin-Walled Flow Formed Pressure Vessels, J. Mater. Process. Technol. 0924 0136, 125 – 126, pp. 228 – 234. Aerospace Material Specification, SAE, AMS 5659T, Steel, Corrosion-Resistant, Bars, Wire, Forgings,Rings, and Extrusions 15Cr – 4.5Ni – 0.30Cb (Nb) – 3.5Cu Consumable Remelted, Precipitation Hardenable