ELASTOPLASTIC STRESS ANALYSIS OF AUTOFRETTAGED INTERNAL CONE-CYLINDER PRESSURE VESSEL

Liu Yong  Zhang Kangda 

(Zhejiang University of Technology)

Wang Liangguo  Yu Daowen

(East China Institute of Technology)

Abstract: This paper firstly presents one mixed hardening material model of high strength steel by means of tension-compression experiment and proposes the non-linear BEM implementation for calculating the loading stress-strains and unloading residual stress-strains of the autofrettaged thick walled internal cone shape-cylinder pressure vessel. Then, the stress fields along axis and radial direction re obtained. The comparison with results of autofretiaged experiment and large FEM program ADINA is given finally.
Key words: Pressure vessel  Stress field  Elastoplastic
Received 19901218, received in revised form 19920520