Fracture of Closed Circular Pipes Under Internal Pressure and Axial Tension Tsuan Ting Indiana University Mathematics Journal 1960 text pdf 10.1512/iumj.1960.9.59051 10.1512/iumj.1960.9.59051 en Indiana Univ. Math. J. 9 (1960) 821 - 867 state-of-the-art mathematics http://iumj.org/access/