IMPROVEMENT OF RESIDUAL STRESSES IN THICK WALL CYLINDERS USING MULTIPLE AUTOFRETTAGE

Determination and Evaluation of Residual Stresses in Thick- Walled Cylinders Due to Autofrettage

Autofrettage is a treatment to introduce beneficial residual stresses into thick-walled cylinders to improve their performance under repeated loading by internal pressure. In the present investigation the residual stresses are measured and their effect was analysed and discussed. The experimental determination of the residual stress distribution was performed by the crack-compliance-method. The...

Determination of Residual Stress for Single and Double Autofrettage of Thick-walled FG Cylinders Subjected to Dynamic Loading

In the present article a numerical procedure is developed for dynamic analysis of single and double autofrettage of thick–walled FG cylinders under transient loading. The governing differential equations are discretized and presented in explicit Lagrangian formalism. The explicit transient solution of discrete equations are obtained on the meshed region and results for stress and strain distrib...

A Simplified Solution for Stresses in Thick-wall Cylinders for Various Loading Conditions

The determination of stresses in thick-wall cylinders, under non-uniform external pressure, may be performed by means of Airy’s stress function approach. In this work a simplified closed-form solution has been obtained for hollow cylinders subjected to loads symmetrically distributed about an axis of the cross-section, acting in the radial direction over part of the circumference. The cylinder ...

A Re-autofrettage Procedure for Mitigation of Bauschinger Effect in Thick Cylinders

Residual Stresses in Rotating Steel Cylinders with Composite Surface Layers

After undergoing a manufacturing process, materials may exhibit internal stresses referred to as residual stresses. In steel-composite hybrid structures, residual stresses are typically formed due to the unequal thermal behaviour of the steel and composite. Thus, knowledge of the residual stress state is important in the assessment of the external-internal loading in steel-composite hybrid stru...