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Introductory Physics Homework Help
Creating Mohr's strain circle from a strain rosette
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[QUOTE="ridiculoid, post: 6062148, member: 620125"] [h2]Homework Statement [/h2] A sample is put in tension and a strain rosette gives the following results: [ATTACH=full]231132[/ATTACH] i) Calculate principal strains and poissons ratio using Mohrs strain circle. ii) Calculate principal stresses from principal strains and poissons ratio. [h2]Homework Equations[/h2] Mohr's strain circle γ = -lateral strain / axial strain σx = E / 1 - γ[SUP]2[/SUP] (εx + γεy) σy = E / 1 - γ[SUP]2[/SUP] (εy + γεx) E = 210 GPa [h2]The Attempt at a Solution[/h2] I have drawn up Mohr's circle in autocad and found the following results. [ATTACH=full]231133[/ATTACH] principal strains = 122.5x10[SUP]-6[/SUP] & -296.5x10[SUP]-6[/SUP] poissons ratio = -122.5 / -296.5 = 0.413 (this seems too high?) principal stresses = σx = 11.5kPa (this is supposed to be low as the load is applied in the y direction?) σy = -62.99MPa (should this be negative if its in tension?) Im hoping someone can tell me if I am on the right track. Thanks in advance! [/QUOTE]
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Introductory Physics Homework Help
Creating Mohr's strain circle from a strain rosette
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