NDLI: Thermal Simulation of an Arbitrary Residual Stress Field in a Fully or Partially Autofrettaged Thick-Walled Spherical Pressure Vessel

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Perl, M.
Copyright Year	2008
Abstract	The equivalent thermal load was previously shown to be the only feasible method by which the residual stresses due to autofrettage and its redistribution, as a result of cracking, can be implemented in a finite element analysis, of a fully or partially autofrettaged thick-walled cylindrical pressure vessel. The present analysis involves developing a similar methodology for treating an autofrettaged thick-walled spherical pressure vessel. A general procedure for evaluating the equivalent temperature loading for simulating an arbitrary, analytical or numerical, spherosymmetric autofrettage residual stress field in a spherical pressure vessel is developed. Once presented, the algorithm is applied to two distinct cases. In the first case, an analytical expression for the equivalent thermal loading is obtained for the ideal autofrettage stress field in a spherical shell. In the second case, the algorithm is applied to the discrete numerical values of a realistic autofrettage residual stress field incorporating the Bauschinger effect. As a result, a discrete equivalent temperature field is obtained. Furthermore, a finite element analysis is performed for each of the above cases, applying the respective temperature field to the spherical vessel. The induced stress fields are evaluated for each case and then compared to the original stress. The finite element results prove that the proposed procedure yields equivalent temperature fields that in turn simulate very accurately the residual stress fields for both the ideal and the realistic autofrettage cases.
Sponsorship	International
Starting Page	231
Ending Page	237
Page Count	7
File Format	PDF
ISBN	9780791848364
DOI	10.1115/ESDA2008-59130
e-ISBN	0791838277
Volume Number	Volume 2: Automotive Systems; Bioengineering and Biomedical Technology; Computational Mechanics; Controls; Dynamical Systems
Conference Proceedings	ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
Language	English
Publisher Date	2008-07-07
Publisher Place	Haifa, Israel
Access Restriction	Subscribed
Subject Keyword	Autofrettage Cracking (materials) Fracture (process) Temperature Algorithms Simulation Pressure vessels Vessels Spherical shells Finite element analysis Residual stresses Stress
Content Type	Text
Resource Type	Article

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