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values in all cases are almost double that of the corresponding trials in the first set of
experiments, as is evident from the results data shown in Table 4.4. Subsequent S/N
ratio calculations, as shown in Fig. 4.5, depict the larger curvature, lower speed and
curved layer deposition as the most favourable combination for the best maximum
compressive load. ANOVA calculations in this case, as shown in Table 4.5 reveal
that curved layer deposition is the main effect that has significant influence on the
overall strength of the parts, at above 95 % confidence level.
Table 4.4 Maximum compressive load after a curing time of more than 3 weeks
Trial No. Curvature Speed Style Strength1 Strength2 Average
1 Low Low Flat 227 273 250
2 Low Low Curved 386 574 480
3 Low High Flat 218 232 225
4 Low High Curved 272 338 305
5 High Low Flat 286 334 310
6 High Low Curved 264 316 290
7 High High Flat 302 368 335
8 High High Curved 268 332 300
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