PSI - Issue 2_B

Sang-Hyun Kim et al. / Procedia Structural Integrity 2 (2016) 2583–2590 Author name / Structural Integrity Procedia 00 (2016) 000–000

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Fig. 6 Variations of normalized limit moments (M o

m  / M

o eq ) for branch pipe under in-plane bending

6. Conclusion In this paper, Present work reports limit loads for branch pipe junctions under internal pressure and in-plane bending which is determined by ma-tangent method. All results are compared with published closed-form solutions and also FE results. Various branch pipe geometries are considered to verify the accuracy of the ma-tangent method. The m  -tangent method is a simple way to estimate limit load for mechanical components. But it does not guarantee accurate limit load estimation. Nevertheless, m  tangent method is rapid method to obtain limit load for complex geometry and loading conditions for specific cases. Acknowledgements This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 2013101010170A). ABAQUS version 6. 14., 2015. User’s manual, Inc. and Dassault Systems. Seshadri, R., Mangalaramanan, S. P., 1997. Lower Bound Limit Loads Using Variational Concepts: The m � -Method, Int. J. Pressure Vessels Piping 71, 93–106. Reinhardt, W. D., Seshadri, R., 2003. Limit Load Bounds for the m � -Multiplier, ASME J. Pressure Vessel Technol. 125, 11–18. Seshadri, R., Adibi-Asl, R., 2007. Simplified Limit Load Determination Using the Reference Two-Bar Structure, ASME J. Pressure Vessel Technol., 129, 280–286. Lee, K. H., Kim, Y. J., Budden, P. J., Nikbin, K,. 2009. Plastic limit loads for thick-walled branch junctions. The Journal of Strain Analysis for Engineering Design 44(2), 143-148. Kim, Y. J., Lee, K. H., Park, C. Y. ,2006. Limit loads for thin-walled piping branch junctions under internal pressure and in-plane bending. International journal of pressure vessels and piping 83(9), 645-653. References