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Mean of SN ratios 45 44 43 42 45 44 43 42 Table 4.3 ANOVA: Experimental set 1 Fig. 4.4 Main effects plot for SN Ratio’s Source DF SS MS F P Curvature 1 7564.5000 7564.5000 29.958 0.032 Style 2 505.0000 252.5000 0.151 0.864 Speed 4 6682.0000 1670.5000 Total 7 14751.5000 1 Flat Curvature Style Signal-to-noise: Larger is better Main Effects Plot for SN ratios Data Means 2 Curved It was clear from the experiences of these experimental trials that the curing time of the epoxy is quite significant in controlling the final characteristics of the parts, and the actual curing time of the epoxy being unknown, another set of components is printed according to the same conditions as before, and left curing for a couple of weeks. The results are quite astonishing in that the maximum compressive load 2 Speed 4 98
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 99
Page 1 and 2:
An Investigation into curved layer
Page 3 and 4:
Contents Abstract..................
Page 5 and 6:
3.5.2 Fabepoxy.....................
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methodology to print simple curved
Page 9 and 10:
List of Figures 1.1 The Rapid proto
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4.3 Parts being tested with Hounsfi
Page 13 and 14:
List of Abbreviations 3D: Three dim
Page 15 and 16:
Fig 1.1 The Rapid prototyping Cycle
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1.1.1 Stereolithography Stereolitho
Page 19 and 20:
The object to be made is first mode
Page 21 and 22:
1.1.5 Laser Engineered Net Shaping
Page 23 and 24:
1.2 Fused Deposition Modeling A det
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Fig 1.8 Deposition Head Different t
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900mc is capable of producing parts
Page 29 and 30:
noted that the parts built in this
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structure. Honeycomb scaffold archi
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optimal direction to build a part t
Page 35 and 36:
processing treatment was analyzed w
Page 37 and 38:
The actual influence of the curved
Page 39 and 40:
Separating the Main part with its s
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limited to simple models. It could
Page 43 and 44:
Fig 2.2 Faces, Edges and Vertices o
Page 45 and 46:
2.1.5 Constructive Solid Geometry C
Page 47 and 48: A STL file is a triangular represen
Page 49 and 50: Fig 2.8 A sample Binary STL File Sl
Page 51 and 52: Different processes may either vary
Page 53 and 54: At the very outset of generating th
Page 55 and 56: and correction of each point to sat
Page 57 and 58: apid prototyping machine are remove
Page 59 and 60: Fig 2.13 Main Part Fig 2.14 Support
Page 61 and 62: As this text file is to be used wit
Page 63 and 64: mounted to the axes carriage. Timin
Page 65 and 66: Fig 3.1 The deposition head At the
Page 67 and 68: 3.2.3 Assembling Electronics and ca
Page 69 and 70: microcontroller is now disconnected
Page 71 and 72: The relationship between test point
Page 73 and 74: on the mechanical properties and po
Page 75 and 76: 3.5.1 Silicone with other materials
Page 77 and 78: Fab@home machine. Since our require
Page 79 and 80: are printed using the two suitable
Page 81 and 82: The support structure‟s dimension
Page 83 and 84: machine Fig 3.13 Flat and curved la
Page 85 and 86: 4.1 Experimental conditions Chapter
Page 87 and 88: have many factors from contention a
Page 89 and 90: 4.3 Taguchi methods There are two t
Page 91 and 92: Such steps usually identify the nee
Page 93 and 94: Nominal is best Larger is better S
Page 95 and 96: Control of material flow - The lead
Page 97: Fig 4.3 Parts being tested with Hou
Page 101 and 102: level. The other parameters were in
Page 103 and 104: The finite element method has had a
Page 105 and 106: performance of finished FDM parts [
Page 107 and 108: ehaviour with failure occurring at
Page 109 and 110: Fig. 2 (a) is the thin curved part
Page 111 and 112: Table 5.1 Property data: Fabepoxy M
Page 113 and 114: optimum number. The final finite el
Page 115 and 116: Fig. 5.11 Load and boundary conditi
Page 117 and 118: overall deflection pattern of two s
Page 119 and 120: Fig. 5.13 Variation of compressive
Page 121 and 122: Fig. 5.15 shows the overall deforma
Page 123 and 124: The effectiveness of the deposition
Page 125 and 126: [11] M. Greul, T. Pintat, M. Greuli
Page 127 and 128: [32] Philip J. Ross, 1988, “Taguc
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