TY - RPRT TI - A constitutive material model for nonlinear finite element structural analysis using an iterative matrix approach AU - Koenig, Herbert A. AU - Chan, Kwai S. AU - Cassenti, Brice N. AU - Weber, Richard PY - 1988 UR - https://ntrs.nasa.gov/citations/19880012137 ID - 19880012137 ER -