Shapememory materials are called smart materials Why are the

Shape-memory materials are called smart materials. Why are they called smart materials? Write two applications of smart materials? Between shape memory alloy (SMA) and shape memory polymer (SMP) which one would you prefer for aerospace and biomedical applications and why?

Solution

Shape-memory materials are called smart materials because these objects can have a kind of memory. The atoms in a metal teaspoon stay in the same place more or less indefinitely: once a spoon, always a spoon. Bend that spoon in a vise and you can deform it so it turns into an unrecognizable slice of metal. But if it\'s made of a special kind of material called a shape-memory alloy, it doesn\'t actually forget that it\'s spoon shaped, and if you heat it up again it will magically spring back into its original shape

Smart Materials in Aerospace:- Sensors built into aircraft will let maintenance people know when repairs or more sophisticated inspections are required.

Smart Materials in Civil Engineering Applications:- mart materials are beginning to play an important role in civil engineering designs for dams, bridges, highways, and buildings.Are useful also to remove corrosion of a Navy Pier and also engineers are introducing sheets of composites materials containing sensors that will alert maintenance engineers to the need for repairs.

Between shape memory alloy (SMA) and shape memory polymer (SMP) we would prefer SMP for aerospace and biomedical applications because SMP has the ability to recover their original shape from a significant and seemingly plastic deformation when a particular stimulus is applied.This is known as the shape memory effect (SME).