TY - JOUR T1 - Viscoplasticity for instabilities due to strain softening and strain-rate softening JO - International Journal for Numerical Methods in Engineering PY - 1997/12/01 AU - Wang WM AU - Sluys LJ AU - de Borst R ED - DO - DOI: 10.1002/(sici)1097-0207(19971030)40:20<3839::aid-n PB - Wiley VL - 40 IS - 20 SP - 3839 EP - 3864 Y2 - 2024/12/22 ER -