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8/20/2019 Jetavat D 2D-3D Braiding Techniques
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Development of 2D/3D Braiding
Techniques for Multi-axial Preforming
Dhaval Jetavat, Khayale Jan, Sree S Roy, B S Sugun
Academic PI: Prof Prasad Potluri
School of MaterialsUniversity of Manchester
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Overview
Introduction
Textile preforming
Need for Multiaxial fibre preforming
2D Braiding 3D Braiding
Challenges
Development of Braiding/Winding
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Textile Composites Group
•
Research at University of Manchester is focused on developingmanufacturing concepts for ‘near-net’ preforms that requireminimum post-processing and at the same time incorporatingmulti functional materials.
Research Objectives Application of low cost automation and robotics in preform
manufacturing
To explore novel toughening concepts through hybrid preforms
To create novel multi-functional hybrids at tow-level and preformlevel
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Textile Composites Group
• Area of Expertise: – Textile technology – 3D Weaving, 3D/2D Braiding, Winding – Robotic Automation, Machine control – Composite manufacturing methods – Mechanical and Physical Testing
• Equipment Expertise – 3D Weaving, 2D Weaving, Braiding – Robotic machine (Tow placement, Winding machine, Tripod system for pick
and place) – Autoclave, RTM, Vacuum Bagging – Instron, ZwickRowell – C-scan, Thermography, DIC, SEM, CT scan
• Near net shape preforming – Preforming trials for creating ply contours – Combination of Braiding/Weaving/RTP processes – Fibre placement on double curvature surface with RTP – Tufting process to add through thickness reinforcement
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Fabric Form
2D Woven Stitched NCF Braided
3D Woven
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2D Braiding
Braiding is the process of diagonally interlacing three or more strands of yarn
in order to create continuous rope, tube or ribbon-like structures Variety of tows can be combined in the axial and braid directions in order tocreate hybrid materials Non-interlaced core materials such as fibre tows, foam materials, metalwires, fibre optics and smart actuating materials can be inserted into a braidedstructure Ability to form complex shapes is one of the key features of braiding
technology
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3D Braiding
3D braided textile preforms can be manufactured either byconventional horngear braiding or by modifying conventionalbraiding techniques
Other recognised methods are 2-step , 4-step row and column
Horngear Braiding machine
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Herzog Braiding Machine
3D braiding machine based on horngearmechanism with 32 carrier capacity hasbeen utilised
Required pattern or tow architecture- Sequencing of bobbin paths bydefining movement paths
- Reinforcing using axial tows
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Fibre path selection
Path Isolation Path Open
Depending on part geometryfibre path needs to be selected
This can be done with the trackarrangement
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Axial yarn arrangement
Maximum of 25 axial yarns can be inserted
Creel has been set-up under braiding bed to insert axial yarns
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Various profile structures
L braid : 24 carriers,17 stuffers Double solid braid : 32 carriers, 25 stuffers
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Solid braid : 16 carriers, 25 stuffers T braid : 20 carriers, 16 stuffers
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Machine design
An automated prototype machinecapable of producing variety ofwound architectures has beendeveloped.
Binding of multi-layer wound
structure during preforming
Winding, axial and binder yarns canbe introduced simultaneously
“CoDeSys” provided by FESTO isused for configuration andoperation of the machine
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Braid-Winding
Consolidated structuredevelopment with
wrinkle minimization
Braid-winding for Quadriaxial Quasi-isotropic preforming(±45°/0°/90°)
Combines the benefits of interlaced and non-interlaced structure Complementary processes so possible in-line manufacturing
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3D weaving-3D Braiding- Tufting
NCF Skin Material
3D Woven “T” Section
3D Braided Noodle
5mm Tufting Pitch
10mm Tufting Pitch
Tufting of “T” section
to NCF material
at 45° near noodle region
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Conclusion
Multiaxial fibres can be introduced in 2D/3D braiding and
winding
Exploration of various profiles on 3D solid braider
3D braid profiles can be utilised to reinforce local areas incomplex shape preforms
Development of novel textile preforming machine to
produce multiaxial preforms with through thickness binder
Various technologies can be combined to produce near net
shape preform to meet design and structure requirements
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