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Why use a 'dogbone' shape for tensile testing specimens?

Once I tried to break a rod without the reduction of diameter, just to see what happens. The rod broke right at the grip and the force released at the breaking point was transferred to the grip and it ...
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What is the difference between an alloy and a metamaterial?

The term "alloy" has a very specific meaning: a metal made of a base metal with additions that modify its properties. The term "metamaterial" is much broader. It refers to a ...

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