Elasto-Plastic Stress Analysis of Thick Cylinders

Abstract:

– Pressure vessels often have a combination of high pressure together with high temperature such as gun barrels and high pressure hydraulic rams. For high pressure application, the cylindrical vessels are made to withstand the working pressure. These types of pressure vessels are made by two techniques, one is shrink-fit cylinders and other one is autofrettage cylinders. Autofrettage technique is used to ensure the pressure vessel highly strengthened due to prestressed effect causing the internal portion of the part to yield and resulting in internal compressive residual stresses. The present work is concerned about the elastoplastic stress analysis of thick cylinders. The numerical analysis is carried out on four different materials which are widely used in pressure vessels by using finite element software ANSYS. The elastic breakdown pressure, overstrain pressure, and bursting pressure of the cylinder are found out and the results are compared with experimental results.

• Periodical: Advanced Materials Research (Volumes 984-985)
• Pages: 456-463
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.984-985.456
• Online since: July 2014
• Authors: A. Mohan*, T. Christopher
• Keywords: ANSYS, Autofrettage, Elastoplastic Analysis, Lame’s Equation

References

[1] J.H. Faupel and A.R. Furbeck, Wilmington Del, Influence of residual stress on behavior of thick Wall closed cylinders – End cylinders, Transaction of the ASME. (1953).

DOI: 10.1115/1.4015286

[2] J.H. Faupel, Yielding and Bursting Characteristics of heavy walled cylinders, Journal of applied Mechanics, 23, Transaction ASME volume78, pp.1031-1064. (1956).

[3] T. Aseer Brabin, T. Christopher, and B. Nageswara Rao, Investigation on failure behaviour of unflawed steel cylindrical pressure vessels using FEA, Multidiscipline modelling in material and structures pp.29-42, (2009).

DOI: 10.1108/15736105200900002

[4] F. John Harvey, Theory and Design of pressure vessels, CBS Press, (1987).

[5] XP. Huang, A general autofrettage model of a thick – walled cylinder based on tensile – compressive stress-strain curve of a material, Journal of strain Analysis. Vol. 40.

DOI: 10.1243/030932405x16070

[6] Anthony P. Parkar, Autofrettage of Open-End Tubes – Pressures, Stresses, Strains, and code comparisons, Journal of Pressure vessel Technology, volume 123/271-281, August2001.

DOI: 10.1115/1.1359209

[7] G.H. Majzoobi, G.H. Farrahi, M.K. Pipelzadeh, A. Akbaria Experimental and finite element prediction of bursting pressure vessels and piping volume81pp. 889-896, (2004).

DOI: 10.1016/j.ijpvp.2004.06.011

[8] Amran Ayob, M. Kabashi Elbasheer, Optimum autofrettage pressure in thick cylinders, Journal mekanikal, No. 24, pp.1-14, (2007).