(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Given two wires of guage length 100mm and 200mm

They are loaded to fracture in tension

The 100mm sample extends by 15mm

The 200mm sample extends by 25mm.

I need to use this information tocalculate the nominal strain at which necking commences in the wires

2. Relevant equations

These are the relavent equations i can find in my notes relating to necking, stress/strain, true stress/strain

we are also told, the true stress/strain curve generally represented by,

where n is the work-hardening exponent

"necking" in a sample started when the value of the true strain is equal to the work hardening exponent, i.e.,

3. The attempt at a solution

Im not so sure where to start with this as there are no forces given or areas. I assume we have to use the two sets of data to equated these terms and cancel them out.

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# Homework Help: Calculating Nominal strain at which Necking Occurs

Can you offer guidance or do you also need help?

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