Hello, How do I take in to account the difference in stiffness when fabricating a part (for example, an L-bracket) from sheet metal or using an extrusion? In particular, where I work, it is "common knowledge" that extrusions are stiffer. How do i factor this in the stress and strain calculations? I thought of using the theory of curved beams for sheet metal parts, and using two perpendicularly connected straight beams for the extrusion. Does anyone have a standard procedure for this? Thank you.