Hi all, I am working on a project where I am making a custom clamp for making cabinet carcasses. I am using cast aluminum to make the clamp, and in the interest of saving metal and time, I am designing the clamp using the equations for the deformation of a beam.
My question for you, is how will cast alumimum's Youngs modulus (modulus of elasticity) compare to what is listed in most reference texts. I do not degass my aluminum and there usually is some mild porosity in my castings. In my mind the stiffness should be decreased by approximately whatever percentage of the casting is porosity. Ex If 1% of the cut cross section is bubbles than the beams stiffness should be 1% less than ideal. This is assuming that the bubbles are evenly distributed and quite small.
If anybody could enlighten me on anything else that might be good to know about the effect of porosity in casting strength/stiffness, it would be much appreciated.