TY - RPRT TI - A viscoelastic constitutive model for creep response of polyurethane rubber AU - Rouiller, Vincent AU - McKenna, Gregory B PY - 1998 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 6177 DO - 10.6028/NIST.IR.6177 ER -