Cozzone theory:fin fin

Approximate: with:

••

Now, assuming a material law of the form:

e = f +e' (L)lIIE U Ftu

where:logle', / 0.002)m=--='--'-;--''--~10g(Ftu / Fty )

«. = ell - Ftu / E

and further assuming that plane sections remain plane in both cases (i.e. linear strain variation from 0 to em),both distributions yield the same moment about the horizontal axis when:

The equivalent stress for a "classic" Mc/I distribution is then Fbm = fin + (k-l) fo