College of Science China University of Mining and Technology Xuzhou 221008 Jiangsu Province P. R. China;
Institute of Computational Mathematics and Scientific/Engineering Computing Chinese Academy of Science Beijing 100080 P. R. China;
Industrial School Xuzhou Normal University Xuzhou 221011 Jiangsu Province P. R. China;
elastic plane problem ofexterior circular domain; bi-harmonic equation; Fourier series; stress function; boundary integral formula;