Effect of Superconvergent Stress Points for Solution Improvement and Error Estimation of Isogeometric Analysis of Axisymmetric Problems

A method for error estimation of isogeometric analysis of plane stress problems which is the based on stress recovery and using the super convergent properties of the Gauss points، has been already introduced. This paper is devoted to the development of the method and study of the effects of these supercovergent points on the solution improvement and error estimation of axisymmetric problems by the isogeometric analysis method. It is concluded that by using these optimal points for stress recovery and error estimation by isogeometric analysis a considerable improvement is attained.