## Theor X

Thus this would be the ideal theoretical strength of steel. 11.2.2 Ideal Strength in Terms of Engineering Parameter

10 We note that the force to separate two atoms drops to zero when the distance between them is a0 + a where a0 corresponds to the origin and a to . Thus, if we take a = ^ or A = 2a, combined with Eq. 11.11 would yield

11 Alternatively combining Eq. 11.9 with A = 2a gives

Combining those two equations will give

a0 J

12 However, since as a first order approximation a « a0 then the surface energy will be

This equation, combined with Eq. 11.12 will finally give

which is an approximate expression for the theoretical maximum strength in terms of E.

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