Plastic Flow and Fracture of a Thick Plate under Uniform Stress Daljit Ahluwalia Indiana University Mathematics Journal 1966 text pdf 10.1512/iumj.1966.15.15049 10.1512/iumj.1966.15.15049 en Indiana Univ. Math. J. 15 (1966) 713 - 734 state-of-the-art mathematics http://iumj.org/access/