Calculate Proportional Limit of Alloy Bar

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SUMMARY

The discussion focuses on calculating the proportional limit of an alloy bar using its length, elongated length, original diameter, reduced diameter, and the load carried. The user successfully determined the modulus of elasticity and Poisson's ratio but sought clarification on calculating the proportional limit. Ultimately, the user resolved the issue independently, indicating that the calculation method was straightforward but not clearly outlined in their reference material.

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JSBeckton
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I am given the length, elongated length, original diameter and reduced diameter of a alloy bar, and the load carried. I need to calculate the mod of elasticity, poisson's ratio and the proportional limit for the material. Got the first 2, how do I calculate the proportional limit? My book it quite vague, as if its obvious, which I'm sure that it is but I missed it, can anyone tell me what i need to do? Thanks
 
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nevermind, I got it
 

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