Effect of heat flux on creep stresses of thick-walled cylindrical pressure vessels Report as inadecuate




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Mohammad Zamani Nejad ;Journal of Applied Research and Technology 2014, 12 (3)

Author: Mosayeb Davoudi Kashkoli

Source: http://www.redalyc.org/


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Journal of Applied Research and Technology ISSN: 1665-6423 jart@aleph.cinstrum.unam.mx Centro de Ciencias Aplicadas y Desarrollo Tecnológico México Davoudi Kashkoli, Mosayeb; Zamani Nejad, Mohammad Effect of Heat Flux on Creep Stresses of Thick-Walled Cylindrical Pressure Vessels Journal of Applied Research and Technology, vol.
12, núm.
3, junio-, 2014, pp.
585-597 Centro de Ciencias Aplicadas y Desarrollo Tecnológico Distrito Federal, México Available in: http:--www.redalyc.org-articulo.oa?id=47431368022 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative   Effect of Heat Flux on Creep Stresses of Thick-Walled Cylindrical Pressure Vessels Mosayeb Davoudi Kashkoli and Mohammad Zamani Nejad* Mechanical Engineering Department, Yasouj University, P.O.
Box 75914-353, Yasouj, Iran. *m.zamani.n@gmail.com ABSTRACT Assuming that the thermo-creep response of the material is governed by Norton’s law, an analytical solution is presented for the calculation of time-dependent creep stresses and displacements of homogeneous thick-walled cylindrical pressure vessels.
For the stress analysis in a homogeneous pressure vessel, having material creep behavior, the solutions of the stresses at a time equal to zero (i.e.
the initial stress state) are needed.
This corresponds to the solution of materials with linear elastic behavior.
Therefore, using equations of equilibrium, stressstrain and strain-displacement, a differential equation for displacement is obtained and then the stresses at a time equal to zero are calculated.
Using Norton’s law in the multi-axial form in conjunction with the above-mentioned equations in the rate form, the radial displacement rate is obtained and then the radial, circumferential and axial creep stress rates are...





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