13th International Conference on Fracture June 16–21, 2013, Beijing, China -8- 5.2. Effect of the core height Fig. 6(a) show the effect of the normalized core height cH to the normalized maximum deflection 1w of the metal sandwich plates under 0.25 I = , in which 1 α= , 2 0.02 c c hH Hρ + = , 45 φ= o , 0.04 ρ= and 1m L= . Obviously, the analytical solutions [15] agree well with the numerical results for the moderate cH , and underestimate and overestimate numerical results for the cases of small and big cH . It is readily seen that the angle φ significantly affects the numerical results for maximum deflection of bottom face sheets in Fig. 6(a). The normalized maximum deflection of bottom face sheet has smallest value when 0.28 cH = . (a) (b) Figure 6. The effect of the (a) normalized core height cH and (b) angle φ to the normalized maximum deflection 1w of the bottom face sheets of sandwich plates 5.3. Effect of the ratio of core height to half-length of the unit Comparisons of the analytical [15] and numerical solutions for the normalised maximum deflection 1w of the bottom face sheets of the sandwich plates versus the angle φ are shown in Fig. 6(b). The angle φ is varied and other values ( 0.25 I = , 0.1 cH = , 0.08 h = , 0.04 ρ= , 1 α= and
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