Textile-based composites could weave future of aerospace engineering

Advanced materials research at The University of Manchester has demonstrated a comprehensive picture of the evolution of damage in braided textile composites for the first time. This could lead the way to new design and implementation possibilities for next-generation aerospace engineers.

High-specification composite materials can be precisely engineered to suit applications with confidence thanks to new imaging techniques. Textile composites in particular offer great potential in creating light-weight damage-tolerant structures. However, their uptake in the high value manufacturing sector has been inhibited by lack of adequate design and material performance data.

Braided textile composites could be designed with confidence for applications ranging from, aerospace and automotive drive shafts, to sporting equipment such as hockey sticks. Braiding technology had a humble beginning in the textile industry for making such items as shoelaces. Today, the integration of robotics and advanced industrial systems has propelled this technology into the high value manufacturing domain in sectors such as, aerospace, automotive and energy.

Now for the first-time unique 3D imaging processes have provided real-time data of how carbon fibre composite tubes perform under structural loading, which provides a blueprint for maximising efficiency of materials used across industry.

According to the team it could prolong the lifespan of mechanical systems reliant on materials by definitively demonstrating load and stress points at which damage initiates and progresses from sub-critical to critical.

By utilising real-time stress and damage tensor data along with developing bespoke composites design tools, future composites will be designed scientifically rather than through copycatting current designs which play to the requirements and weaknesses of metals currently used in industry.

The materials tested and examined in this work were braided carbon fibre composite tubes which are fabricated by braiding the fibre tows into a continuous interlaced helices. Recent advances show there is considerable scope for tailoring braided structure to suit specific service requirements. This flexibility also challenges the design and manufacturing process of braided composites. This means the way engineers develop applications can start to be seen in a different light for the next generations of aircraft for example.

Prof Prasad Potluri, research director of the Northwest Composites Centre said: “This is a fantastic opportunity to push the advanced braiding technology through the technology readiness levels with the aid of the in-situ X-ray imaging facility at the Henry Royce Institute”.

Tom Austin-Morgan

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