6.4 - l l o elastic deformation (macroscopic and atomic...

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Structural engineers determine the stresses and stress distributions that will develop in a material for different loading conditions. It is the job of the material’s engineer to figure out how to produce and fabricate materials that will withstand these stresses. Stress and Strain (engineering or nominal) (normal: F A C or T) stress, s = F A o (engineering or nominal) (normal: C or T) strain, e =
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Unformatted text preview: l l o elastic deformation (macroscopic and atomic level) stretching of atomic bonds plastic deformation (macroscopic and atomic level) distortion, breaking and reformation of atomic bonds true stress, = F/A i true strain, = ln o i l l ( = li lo l dl ) Note: If volume is constant A i l i = A o l o Ai Ao lo li = Ai Ao ln =...
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This note was uploaded on 08/10/2009 for the course ENGN 45 taught by Professor Wendy during the Spring '09 term at City College of San Francisco.

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