%0 Journal Article %T Impact force and moment problems on random mass density fields with fractal and Hurst effects %A Martin Ostoja-Starzewski %A Xian Zhang %J - %D 2020 %R 10.1098/rsta.2019.0591 %X This paper reports the application of cellular automata to study the dynamic responses of Lamb-type problems for a tangential point load and a concentrated moment applied on the free surface of a h.. %U https://royalsocietypublishing.org/doi/10.1098/rsta.2019.0591