Pros and cons of each construction process, and their properties
| Construction process | Pros | Cons | Properties of fabric |
|---|---|---|---|
| Braiding | Excellent for cylindrical components due to the production of continuous linear material Can be draped around complex shaped mandrel Capable of braiding non-continuous cross-sections, either hollow or solid Cost effective technique for wide range of composite preforms | Fabric width and preform size is limited | Excellent shear resistance High energy absorbing capability |
| Weaving | High production speeds 2D weaving machines can be easily adapted to produce 3D fabrics Various weft insertion methods to allow curved edges Advances in jacquard mechanics and motors permits variable shedding geometries, and when combined with appropriate weft insertion methods, tailored net-shape preforms can be produced | Fixed maximum width Slow machine set-up due to warping process | Provides the highest strength and stability High dimensional stability High yarn packing density Increased resistance to impact damage High compressive strength in 3D woven |
| Knitting | High drapeability/formability and extensibility Can form to complex shapes Variable widths achieved through shaping capabilities Quick and easy changes to yarn selection | Loop structure can lead to slight distortion of fabric during manufacture of composite High curvature of yarns results in reduction in mechanical properties, such as reduced in-plane stiffness and strength Lower fibre volume fraction compared to woven | High elastic behaviour (dependent on appropriate selection of yarns) Good energy absorbing characteristics |
| Construction process | Pros | Cons | Properties of fabric |
|---|---|---|---|
| Braiding | Excellent for cylindrical components due to the production of continuous linear material | Fabric width and preform size is limited | Excellent shear resistance |
| Weaving | High production speeds | Fixed maximum width | Provides the highest strength and stability |
| Knitting | High drapeability/formability and extensibility | Loop structure can lead to slight distortion of fabric during manufacture of composite | High elastic behaviour (dependent on appropriate selection of yarns) |
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