Composite materials are fundamental to modern aerospace, enabling aircraft manufacturers to produce lighter, stronger and more efficient airframes while maintaining the highest standards of safety and performance. Today, composites are used extensively in commercial aircraft, military platforms, helicopters, business jets, unmanned aerial vehicles (UAVs), space systems and advanced air mobility (AAM) vehicles.
The aerospace sector has been at the forefront of composite material innovation for more than four decades, with carbon fibre reinforced polymer (CFRP) becoming a key structural material in next-generation aircraft. As the industry works towards net zero aviation, composites will continue to play a critical role in improving fuel efficiency, reducing emissions and enabling new aircraft concepts.
Aircraft Structures
Composite materials are widely used throughout primary and secondary aircraft structures, delivering exceptional strength-to-weight performance, fatigue resistance and corrosion resistance.
Typical applications include:
- Wings and wing boxes
- Fuselage sections
- Horizontal and vertical tailplanes
- Engine nacelles
- Wing fairings
- Radomes
- Flight control surfaces
- Landing gear doors
- Access panels
- Cargo doors and service doors
- Floor beams and floor panels
Carbon fibre composites dominate structural applications, while glass fibre, aramid fibre and hybrid composites are also used where their specific properties provide performance advantages.
Aircraft Interiors
Composites are extensively used throughout aircraft cabins to minimise weight while meeting stringent fire, smoke and toxicity (FST) requirements.
Applications include:
- Cabin sidewalls
- Ceiling panels
- Galleys
- Lavatories
- Overhead luggage bins
- Seating structures
- Partition walls
- Floor panels
- Cockpit interiors
The ability to manufacture lightweight, durable components contributes to lower operating costs while enhancing passenger comfort.
Propulsion Systems
Composite materials are increasingly used within aircraft propulsion systems to improve efficiency and reduce engine weight.
Applications include:
- Fan blades
- Fan cases
- Engine nacelles
- Thrust reversers
- Acoustic liners
- Air intake structures
Advanced ceramic matrix composites (CMCs) are also being adopted in high-temperature engine components, enabling engines to operate more efficiently while reducing fuel consumption.
Advanced Air Mobility and Uncrewed Aircraft
The emergence of electric aircraft, drones and advanced air mobility (AAM) platforms is creating significant new opportunities for composite materials.
Applications include:
- Electric vertical take-off and landing (eVTOL) aircraft
- Uncrewed aerial vehicles (UAVs)
- Hydrogen aircraft structures
- Lightweight battery enclosures
- Integrated aerodynamic structures
The high strength-to-weight ratio of composites is particularly valuable for electrically powered aircraft, where every kilogram saved contributes to increased payload and range.
Why Use Composites in Aerospace?
Composite materials have transformed aerospace design by enabling lighter, stronger and more efficient aircraft.
Key benefits include:
- Significant weight reduction, improving fuel efficiency and reducing emissions
- Exceptional strength-to-weight and stiffness-to-weight ratios
- Excellent fatigue and corrosion resistance
- Improved aerodynamic performance through complex, integrated shapes
- Reduced part count and simplified assembly
- Lower maintenance requirements and extended service life
- Excellent vibration damping and passenger comfort
- High design flexibility for advanced aircraft concepts
- Compatibility with automated manufacturing technologies
- Increasing opportunities for repair, recycling and circular composite solutions
As aerospace manufacturers continue to develop the next generation of sustainable aircraft, composite materials will remain at the heart of innovation. Advances in automated fibre placement (AFP), out-of-autoclave processing, thermoplastic composites, recycled carbon fibre and digital manufacturing are enabling more efficient production while supporting the industry’s journey towards net zero aviation.
Space
The successful application of composites in missiles has led to the development of primary structures for space vehicles. In fact, space applications lend themselves in many ways to the utilisation of new materials. For satellites, for example, the timescales from concept to manufacture can be as little as two years and the short product runs normally involved, the materials element in the final cost is often relatively low. Also in many applications no other material is suitable for technical reasons.
Once in orbit, mechanical loads are comparatively low. Environmental conditions can be extreme and severe thermal cycling can occur, as well as the effects of high-vacuum and erosion through atomic oxygen or micrometeroid impacts. Glass-fibre composite (GRP) is used in applications where thermal insulation is important, for example in local bracketry. The material is also used in some antenna reflectors.
Carbon-fibre composite (CFRP), however, is most often associated with space applications. The potential for very high-stiffness and excellent thermal stability over a wide temperature range make CFRPs ideal. Examples of their application include: fairings, manipulator arms, antennae reflectors, solar array panels and optical platforms and benches. They have also recently been used for primary structure applications. In the past the need for a combination of stiffness and strength, and for thermal and electrical conductivity have favoured metals. However, the constant pressure for weight reduction means that now some satellites have been built with a predominantly composite structure sub-system.
Spacecraft, launch vehicles, and hypersonic platforms experience extreme thermal loads during atmospheric entry and high-speed flight. Ceramic matrix composites provide exceptional thermal stability, oxidation resistance, and structural integrity in these environments. Applications include thermal protection systems, rocket nozzles, and leading edges for hypersonic vehicles