Stress characterization of autofrettaged thick-walled cylinders
Date
2003Author
Kihiu, J. M
Mutuli, S. M
Rading, G. O
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
The inaccessibility of commercial software has necessitated the development of low-cost, general-purpose finite element method (FEM) computer programs for structural analysis. Using the FEM program, the elastic, elastic-plastic, residual and service stresses and displacements in a closed ended, thick-walled cylinder under internal pressure were established. The displacement formulation was implemented and eight-noded brick isoparametric elements chosen. The frontal solution technique and the incremental theory of plasticity were used, as only limited computing facilities were available. The results were found to be in very good agreement with the through-thickness analytical values. The benefits of autofrettage were demonstrated and an optimum overstrain of 16% established for a cylinder with a thickness ratio of 2. The material economy achieved through autofrettage and the limitations imposed are illustrated. The FEM program could therefore be reliably used for other complex geometries and load conditions.
URI
http://ijj.sagepub.com/content/31/4/370.abstracthttp://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/55443
Citation
J. M. Kihiu, S. M. Mutuli and G. O. Rading (2003). Stress characterization of autofrettaged thick-walled cylinders. International Journal of Mechanical Engineering Education, Volume 31, Number 4Publisher
Department of Mechanical Engingeering