TOOLED THICK COMPOSITES by ARVEN H. SAUNDERS III ...

LIST OF ILLUSTRATIONS
Figure Page
1.1 Overall Cure Process ............................................................................................................... 1
1.2 Schematic Representation of Thickness for a Typical
Thick Laminate (side or through thickness view) ..................................................................... 4
1.3 Fiber/Layer Waviness in a Section of a Thick
S2/8552 Composite Laminate .................................................................................................. 5
2.1 A Typical Bond Press Cure Cycle ............................................................................................ 8
3.1 Generic Flexbeam with Tooling Model ................................................................................... 23
3.2 Consolidation of a Flat Laminate with Pressure
Applied by a Rigid Surface .................................................................................................... 28
3.3 Permeability as a Function of Fiber Volume Fraction. ........................................................... 29
3.4 Effective or Fiber Bed Stress vs. Fiber Volume Fraction. ...................................................... 31
3.5 Flat Laminate Model Constant Displacement Rate and Position Hold. ................................. 34
3.6 Flat Laminate Model Constant Pressure Dwell ...................................................................... 35
3.7 Flat Laminate Model Constant Pressure Dwell
with Permeability as a Function of Vf. ................................................................................... 36
3.8 Model Control Volumes and Nodes
Representing a Simple Flat Laminate.. ................................................................................. 37
3.9 Flow Resistance Network Representing the Laminate. ......................................................... 42
4.1 Lengthwise View of Tool Lid (red) Contact with Flexbeam (blue).. ........................................ 51
4.2 Progressive Lid Contact with Laminate ................................................................................. 52
4.3 Conventional Approach using Two Temperature Dwells ...................................................... 54
4.4 Second Attempt at Thermal Cycle Using Multiple Dwells ..................................................... 55
4.5 Application of Self-Directed Temperature Control
using Estimated Future Cure Rate ........................................................................................ 56
4.6 Acceptable S2/8552 Flexbeam Temperature Cycle ............................................................. 57
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