SUPERCONVERGENT BOUNDARY STRESS EXTRACTION AND SOME EXPERIMENTS WITH ADAPTIVE POINTWISE ERROR CONTROL

In Reference 1, a class of extraction formulations were developed to r ecover solution quantities with superconvergent accuracy. As a continu ation, this paper documents some new developments in the boundary stre ss extraction method to expand its applications to boundary locations that are not traction-free. Furthermore, the convergence characteristi cs of the extracted pointwise stress are investigated in an h-adaptive process using different adaptive error control schemes. Observations from those numerical experiments provide some initial insight toward t he development of an adaptive approach that can obtain prescribed poin twise solution accuracy with optimal computation efficiency.