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Fig. 5.7 Stress-strain diagram of Fabepoxy From the stress-strain graph of Fig. 5.7, the modulus of elasticity is calculated as the slope of the straight line portion, which is equal to 4.1 GPa. It is difficult to establish the exact value of Poisson ratio, but generally, ABS polymer, the other common material is reported to have a Poisson‟s ratio of 0.4, and the same value is used in the current trials. All the relevant property data is assigned to the Fabepoxy material created in the Abaqus software. A section and an assembly of each of the test part are then created and the material properties are assigned to the part. The next stage is to discretise the problem domain with finite elements. Thee tetrahedral elements for transient elastic stress analysis are selected from the Abaqus element library. There were problems encountered while meshing, considering the relatively complex geometry arising out of the mesostructure with characteristic gaps. Very fine elements were necessary to be able to fill the entire volume with continuous elements. The global seeding option is used for this purpose and many trials with different size of global seeds were made before finalising the 112
optimum number. The final finite element meshes generated for the flat and curved layer models are shown in Fig.s 5.8 and 5.9 respectively. Fig. 5.8 The finite element mesh used for the flat layer model Fig. 5.9 the finite element model used for the curved layer model 113
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
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Fig 1.1 The Rapid prototyping Cycle
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1.1.1 Stereolithography Stereolitho
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The object to be made is first mode
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1.1.5 Laser Engineered Net Shaping
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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
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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
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processing treatment was analyzed w
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The actual influence of the curved
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Separating the Main part with its s
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limited to simple models. It could
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Fig 2.2 Faces, Edges and Vertices o
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2.1.5 Constructive Solid Geometry C
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A STL file is a triangular represen
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Fig 2.8 A sample Binary STL File Sl
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Different processes may either vary
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At the very outset of generating th
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and correction of each point to sat
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apid prototyping machine are remove
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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 and 98: Fig 4.3 Parts being tested with Hou
Page 99 and 100: values in all cases are almost doub
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: Table 5.1 Property data: Fabepoxy M
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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