“…To date, there were some investigations that took into account the dynamic fracture problems of the MEE materials. These studies include the transient response of the cracked solids under impact loads (Feng et al, 2005(Feng et al, , 2009Su, 2006, 2007;Feng and Liu, 2007;Li, 2005;Rangelov et al, 2011;Wang et al, 2010;Yong and Zhou, 2007;Zhong et al, 2009), the elastic wave scattering induced by cracks (Du et al, 2004;Li and Lee, 2009;Rojas et al, 2010;Zhang, 2011;Wang, 2006, 2008) and the coupled fields produced by the moving crack at a constant speed and with a fixed length (Hu and Li, 2005;Hu et al, 2007;Zhong and Li, 2006;Tupholme, 2009).…”