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Old Aug 3rd 2008, 06:38 PM   #1
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Elastic modulus

An aluminium rod of cross-section 10 mm x 10 mm is stretched along its axis, changing length from 1.000 m to 1.001 m. The deformation is elastic, or fully recoverable. Given that the modulus of the aluminium is 70 GPa, the stress on the rod is?

please don't give the answer but help me solve it/provide a formula. I don't mean to sound demanding.
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Old Aug 4th 2008, 05:51 AM   #2
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Hello

Do you know Hooke's law? If not, take a look at the paragraph titled "elastic materials" of this wikipedia article.
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Old Aug 4th 2008, 08:06 AM   #3
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elastic modulus

thanks for that, i knew the equation i just hadn't used it in a while
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