If you look at consumer products or structural components, "bends" and "corrugations" are used to increase stiffness. This is not necessarily the same thing as "webs", which just add additional material in order to withstand more strain. This also should be considered seperate from things like "work hardening" in metals, which increase material strength via the production of dislocations in the metal atomic structure. Instead, this appears to be due to the difference in geometry between structures with "bends" and structures without "bends". Does the geometry of the "bend" have a direct effect on the modulus of the material (i.e. E or G), or is it instead something involving plate-bending theory (a bend in the plate means that the moment arm of the bending-moment - hypotenuse of a triangle - is smaller than the length along the plate surface between the two bending-moments - sides of a triangle opposite of the hypotenuse), which would require more moment to induce bending?
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