Composite material
Composite materials merge dissimilar constituents for enhanced properties.
A composite material, also called a composition material, is produced from two or more constituent materials with notably dissimilar chemical or physical properties. These constituents are merged to create a material with properties unlike the individual elements, and within the finished structure the elements remain separate and distinct, distinguishing composites from mixtures and solid solutions. Composite materials can be less expensive, lighter, stronger, or more durable than common materials, and some are inspired by biological structures found in plants and animals.
- common_modern_example
- concrete (most common artificial composite)
- field
- materials science and engineering
- known_for
- combining dissimilar materials to achieve superior properties
Lore & Background
The earliest composite materials were made from straw and mud combined to form bricks for building construction, with ancient brick-making documented by Egyptian tomb paintings. Woody plants, such as true wood from trees, palms, and bamboo, yield natural composites used prehistorically and still used widely in construction and scaffolding. Cartonnage, layers of linen or papyrus soaked in plaster, dates to the First Intermediate Period of Egypt c. Cob mud bricks, using mud with straw or gravel as a binder, have been used for thousands of years. Concrete was described by Vitruvius around 25 BC, who distinguished types of aggregate for lime mortars and specified ratios for structural and underwater use. Papier-mâché, a composite of paper and glue, has been used for hundreds of years.
Reader's Guide
Composite materials are significant because they allow engineers to tailor properties—such as strength, stiffness, weight, and durability—that are not achievable with a single material. Concrete, the most common artificial composite, is used in vast quantities worldwide (about 7.5 billion cubic metres per year as of 2009) and is often reinforced with steel to resist tensile forces. Fibre-reinforced polymers, including carbon-fiber and glass-reinforced plastics, are widely used in aerospace, automotive, and sporting goods. Advanced composites, such as shape-memory polymer composites and high strain composites, enable deployable structures and dynamic reinforcement. Sandwich-structured composites, with thin stiff skins and a lightweight core, provide high bending stiffness at low density. The legacy of composites extends from ancient building materials like wattle and daub and plywood to modern robotic materials that include sensing, actuation, computation, and communication components. Composites are used for construction, boat hulls, racing car bodies, storage tanks, and increasingly in general automotive applications. Their ability to combine dissimilar materials—such as glass fibres in a polymer matrix—produces materials that are stiff, strong, flexible, and ductile, demonstrating the enduring value of this approach.
Did You Know?
- The earliest composite materials were made from straw and mud combined to form bricks for building construction.
- Concrete is the most common artificial composite material, with about 7.5 billion cubic metres made each year as of 2009.
Frequently Asked Questions
What is a composite material?
A composite material is a substance engineered by combining two or more distinct materials that have noticeably different chemical or physical characteristics. The goal is to produce a final product whose performance exceeds what any single ingredient could achieve on its own.
How is a composite different from a simple mixture or solid solution?
In a true composite, the individual constituents stay physically separate and identifiable within the finished structure, whereas mixtures and solid solutions blend their components at a more uniform level. This structural distinctness is what allows composites to retain and combine the unique strengths of each ingredient.
Why are composite materials so widely used in modern construction?
Composites can be cheaper, lighter, stronger, or more durable than conventional building materials, making them attractive for a wide range of applications. Concrete, the most common artificial composite, is a prime example of how blending dissimilar ingredients yields superior structural performance.
More in Construction & Materials 1-19
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record