What are smart and modern materials, and how do designers exploit their responsive or advanced properties in products?
Smart materials that change a property in response to an external stimulus (shape memory alloys, thermochromic and photochromic pigments, piezoelectric and electroluminescent materials) and modern materials developed by research (Kevlar, graphene, nanomaterials, polymorph), and their use in products.
A focused answer to OCR A-Level Product Design on smart and modern materials: shape memory alloys, thermochromic, photochromic, piezoelectric and electroluminescent materials, and modern materials such as Kevlar, graphene, nanomaterials and polymorph, with the stimulus, the response and a product application for each.
Reviewed by: AI editorial process; not yet individually human-reviewed
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What this dot point is asking
OCR wants you to define smart and modern materials, name examples, and explain the stimulus, the response and a product use for each. Smart materials change a property in response to a stimulus; modern materials are advanced materials developed by recent research.
What makes a material smart
The single most-tested point is to link the stimulus to the response: a smart material is not just one with unusual properties; it is one that responds to something.
Responsive smart materials
Electrically active smart materials
Modern materials
Modern materials are usually chosen for an outstanding single property (strength-to-weight, conductivity, a surface effect) that a conventional material cannot match, accepting a higher cost.
Exam-style practice questions
Practice questions written in the style of OCR exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
OCR 20194 marksDefine a smart material, name two different smart materials, and for each describe the stimulus it responds to and one product that uses it.Show worked answer →
A Component 01 short-answer question. One mark for the definition and one for each correctly described smart material with its product.
Award marks for: a smart material is one whose properties change in a controllable, reversible way in response to an external stimulus such as heat, light, electricity, stress or pH. Two examples: a thermochromic pigment changes colour with temperature, used in a kettle or baby-bottle indicator or a battery-test strip; a shape memory alloy (such as Nitinol) returns to a remembered shape when heated above a transition temperature, used in spectacle frames or medical stents.
A common dropped mark is naming a property change but not the triggering stimulus. The mark is for linking stimulus to response (heat changes the colour, heat restores the shape).
OCR 20218 marksDiscuss how the use of smart and modern materials can improve the function and user experience of consumer products. Use named materials and products in your answer.Show worked answer →
A Component 01 levels-of-response question (AO1 knowledge plus AO3 evaluation). It is marked by levels, not point-counting.
A top-level answer names materials, ties each to a function, and weighs benefits against drawbacks. For example: thermochromic pigment on a kettle gives the user instant visual feedback that the water is hot, improving safety without electronics; a shape memory alloy in spectacle frames lets them spring back after bending, improving durability and reducing warranty returns; piezoelectric materials in a touch interface or a self-powered sensor remove the need for a battery, aiding sustainability; Kevlar in protective clothing gives a very high strength-to-weight ratio, improving safety without bulk; graphene or nanocoatings can make a surface self-cleaning or scratch-resistant. The evaluation should weigh the higher cost, the recycling difficulty and the sometimes limited durability of these materials against the functional gains, and conclude with a judgement (for example, smart materials add most value where they replace electronics or improve safety, but their cost limits them to higher-value products).
Markers reward a balanced, applied argument with a justified conclusion, not a list of materials.
Related dot points
- The classification of materials used in product design: papers and boards, natural and manufactured timbers, ferrous and non-ferrous metals and alloys, thermoplastic and thermosetting polymers, and composites, with the defining features of each category.
A focused answer to OCR A-Level Product Design on the classification of materials: ferrous, non-ferrous metals and alloys, thermoplastic and thermosetting polymers, hardwoods, softwoods and manufactured boards, papers and boards, and composites, with the defining feature and a named example of each category.
- The physical and mechanical properties of materials (strength, hardness, toughness, ductility, malleability, elasticity, plasticity, density, conductivity, durability) and how they govern the suitability of a material for a product.
A focused answer to OCR A-Level Product Design on the physical and mechanical properties of materials: tensile and compressive strength, hardness, toughness, ductility, malleability, elasticity, plasticity, density and conductivity, with definitions, the calculation of density, and how each property governs material choice.
- The selection of materials and standard stock forms (sheet, bar, rod, tube, extrusion, granules, pre-formed sections) for a product, weighing functional, aesthetic, economic, manufacturing, availability and environmental factors.
A focused answer to OCR A-Level Product Design on selecting materials and stock forms: the functional, aesthetic, cost, availability, manufacturing and environmental factors, the standard stock forms (sheet, bar, rod, tube, extrusion, section, granules), and how a designer justifies a material choice for a product.
- Electronic systems as input, process and output blocks: sensors and switches as inputs, processing devices, and output transducers, with Ohm's law, series and parallel resistors, and the potential divider used to sense light and temperature, including calculations.
A focused answer to OCR A-Level Product Design on electronic systems: the input, process, output model, sensors and output transducers, Ohm's law, series and parallel resistors, and the potential divider used with an LDR or thermistor, with worked calculations.
- The work and influence of major designers (James Dyson, Dieter Rams, Charles and Ray Eames, Philippe Starck, Marc Newson, Margaret Calvert, Harry Beck, Raymond Loewy), their design philosophies, signature products and influence on later design.
A focused answer to OCR A-Level Product Design on influential designers: James Dyson, Dieter Rams and his ten principles, Charles and Ray Eames, Philippe Starck, Marc Newson, Margaret Calvert, Harry Beck and Raymond Loewy, with each designer's philosophy, signature products and influence on later design.
Sources & how we know this
- OCR A Level Design and Technology (H404-H406) specification — OCR (2017)