Simulation testing of the shipping package mock-ups under the impact of a falling aircraft engine. Part 2
Authors: Kazantsev A.G., Abramov V.V., Petrov O.M., Radchenko M.V.
Published in issue: #2(158)/2025
DOI: 10.18698/2308-6033-2025-2-2420
Category: Mechanics | Chapter: Mechanics of Deformable Solid Body
The impact of a falling down aircraft is included as an external event in analyzing accidents in the transportation and outdoor storage of the shipping packages (SP) with the spent nuclear fuel. Part 2 presents a methodology for testing the SP set-ups depending on the impact type and taking into consideration technological defects in the SP body. In accordance with the proposed methodology, an artificial crack-like defect is created in the set-up body in the zone of the maximum tensile stresses to justify the SP integrity. Its dimensions are determined by technological defects in the forgings and welds approved in the SP manufacture, set-up scale, and dispersion of the fracture toughness characteristics in the body material. Conservatism of the simulation test results is ensured by the fact that a probability of the set-up failure with an artificial defect exceeds a probability of the full-scale SP failure. Using the master curve concept makes it possible to assess probabilities of the full-scale SP failure and of the reduced set-up dimension depending on the test temperature. The paper shows that the 09N2MFBA-A steel used in manufacturing the SP body provides the high dynamic fracture toughness values and ensures the SP integrity at the temperatures as low as –60°С.
EDN YGFSQN
References
[1] Kazantsev A.G., Abramov V.V., Petrov O.M., Radchenko M.V. Modelirovanie ispytaniy maketov transportnykh upakovochnykh komplektov na udarnoe vozdeystvie dvigatelya padayushchego samoleta. Chast 1 [Simulation testing of the shipping package mock-ups under the impact of a falling aircraft engine. Part 1]. Inzhenerny zhurnal: nauka i innovatsii — Engineering Journal: Science and Innovation, 2025, iss. 1. EDN ZFSUEB
[2] Metodologicheskie rekomendatsii MR-125-032–95. Pravila sostavleniya raschetnykh skhem i opredelenie nagruzhennosti elementov konstruktsiy s vyiavlennymi defektami [Methodological recommendations MR-125-02–95. Rules for compiling calculation schemes and determination of the loading parameters in structural elements with the identified defects]. Moscow, TsNIITMASh Publ., 1995, 52 p.
[3] PNAE G-7-010–89. Oborudovanie i truboprovody atomnykh energeticheskikh ustanovok. Svarnye soedineniya i naplavki. Pravila kontrolya [PNAE G-7-010–89. Equipment and pipelines of the nuclear power plants. Welded joints and surfacing. Control rules]. Moscow, 2000, 164 p.
[4] ASTM E1921-23. Standard test method for determination on reference temperature T0 for ferritic steels in transition range. ASME, 2023, 40 р.
[5] Kazantsev A.G., Skorobogatykh V.N., Pogorelov E.V., Pimenov V.A., Koro-lev S.Yu. Opredelenie temperaturnoy zavisimosti vyazkosti razrusheniya metalla tolkostennoy obechayki s uchetom ee neodnorodnosti [Determination of the temperature dependence of the fracture toughness of the metal of a thick-walled shell taking into account the inhomogeneity of the material]. Zavodskaya laboratoriya. Diagnostika materialov, 2023, vol. 89, no. 3, pp. 46–56.
[6] Kazantsev A.G., Markochev V.M., Sugirbekov B.A. Statistical estimate of determining the critical temperature of brittleness for metal of the VVER-1000 reactor vessel using impact bending test data. Inorganic Materials, 2018, vol. 54, no. 15, pp. 55–63.
[7] Wallin K., Mahidhara R.K., Geltmatcher A.B., Sadananda K., eds. Effect of strain rate on the fracture toughness reference temperature T0 for ferritic steels. Recent Advances on fracture. Proceedings of a symposium held at the Annual Meeting of The Minerals, Metals and Materials Society. Orlando, United States, 1997, рр. 171–182.