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Rothlisburger
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I'm teaching a class using Shigley's Mechanical Engineering Design. There is a section on deflection of curved members. If you have this text, you'll notice it calculates the strain energy in bending, axial, and shear, as usual. Then it says that there's another "negative" strain energy component, and cites an equation for this without introduction or reference. The text explaining this term is incomprehensible.
First off, since the strain energy is the integral of the strain energy density throughout the volume, and since we've accounted for all stresses (bending, axial, and shear), why should we need another term? And since when can strain energy be negative?
Any help would be most appreciated.
-David
First off, since the strain energy is the integral of the strain energy density throughout the volume, and since we've accounted for all stresses (bending, axial, and shear), why should we need another term? And since when can strain energy be negative?
Any help would be most appreciated.
-David