Bending stiffness is a function of moment of inertia and Young's Modulus.

Bending stiffness is not a material property - it is related to the geometry of the section as well as the material stress-strain properties. Increase the moment of inertia of a section for a given material and the bending stiffness increases.
My engineering degree was 43 years ago, but I remember the fundamentals.

In response to this post by HokieSignGuy

Posted: 02/21/2019 at 12:15PM

Why Most Modern Cars Have a Weird Flat Edge Around the Wheel -- EDGEMAN 02/21/2019 09:57AM

Nothing that can’t be fixed with a fender roller... -- No1Hokie 02/21/2019 12:30PM

Oops wrong post** -- TechMomof2 02/21/2019 11:49AM

Same reason that corrugated sheet metal is stiffer than flat sheet metal... -- Hokie in CT 02/21/2019 11:26AM

It's not the moment of inertia that changes, but the stiffness.. -- HokieSignGuy 02/21/2019 11:56AM

Bending stiffness is a function of moment of inertia and Young's Modulus. -- Hokie in CT 02/21/2019 12:15PM

I think I am just thinking of moment of intertia as it relates to -- HokieSignGuy 02/21/2019 12:33PM

You originally were probably think of stiffness in terms of uniaxial stress -- Hokie in CT 02/21/2019 2:18PM

Trying to make cheap metal stronger. Give me an 70's80's square body truck ** -- hokieman842 02/21/2019 10:56AM

Interesting. There's a purpose for most everything. ** -- MikeVT85 02/21/2019 10:12AM

I had noticed, just figured it was the latest look -- `lag 02/21/2019 10:07AM

Bending stiffness is a function of moment of inertia and Young's Modulus.

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