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what does a high thermal expansion coefficient mean

However, if material becomes hotter or colder, it might expand or shrink, changing its size and/or shape. This phenomenon is known as thermal expansion. A thermal expansion coefficient is something that is often referred when we talk about thermal expansion. This is a unique number which tells us how much a material will expand (means increase in size) or contract (means decrease in size) on changing temperature. Larger coefficients indicate that the material enlarges more than that with small coefficients. This is a key concept in practice — especially when you are dealing with multiple materials.

Certain materials, particularly those exhibiting a high temperature expansion coefficient, are liable to undergo change of shape with a change of temperature. This implies that these materials, when bolt warmed, could twist in a circular segment, or eventually stretch out of shape, reminiscent of memory polymers. If we rely on these materials to remain in this shape, then this is a huge issue. Let's say we have a bridge built from a material that has a high thermal expansion coefficient. As this temp rises and the bridge warms up, then it's going to be subject to, basically, bending/morphing with the temperature. Now, if its a bypass bridge then these guys have increased the distance around the trip so much that it is endangering any person driving on that bridge. any bridge which doesnt path straigt in sstraightway is not worthy of driving on it.

The relationship between temperature and expansion in high coefficient materials

With an increase in temperature, materials have a tendency to expand more. This is the case with all materials, however even more so with materials having high thermal expansion coefficients. Now, consider this: When we heat up a material with high thermal expansion coefficient, it will expand much more than when we heat up a material with low coefficient. This is especially high on the list when we are selecting materials for different applications. If we want a material that does not deform too much at high temperature, we should choose a low thermal expansion coefficient material. That way, you can be sure that it is fabric of choice that is robust and it is going to maintain its structure.

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