Fig. 4From: Impact resistance of steel materials to ballistic ejecta and shelter development using steel deck platesRelationship between impact energy and plate thickness for SUS304 (Fukui et al. 2017) and SS400 (Yamada et al. 2016). The dashed lines represent the relationship between the penetration boundary energy and the plate thickness. The dotted line indicates the modelled impact energy of 9 kJ for 128 mm diameter, spherical ballistic ejecta (2.66 kg at approximately 83 m/s on impact) that were ejected during the Mt. Ontake eruption in 2014. As shown, for a given plate thickness, SUS304 is superior to SS400 in terms of impact resistanceBack to article page