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03.14.2007, 07:49 PM
Gustav, that's true about 6061 and 7075 typically being similar in strength for the "typical" part design. HOWEVER, IF you design it right (which takes skill, and experience, and 'feeling') the stresses (such as impact) should be transfered in such a way as to avoid modulus stress, and basically transfer it as a tensile force. And use the material to it's capability. That would allow 7075 to fully show it's stuff.
6061-T6 typical tensile yield: 40,000psi 2.7g/cm3
7075-T6 typical tensile yield: 83,000psi 2.74g/cm3
2024-T3 typical tensile yield: 70,000psi, 2.77g/cm3 superior fatigue
I have tested the bottom chassis plate mayn times with ALGOR designcheck, and managed to get VERY distributed stress, while at the same time keeping the motto "form follows function", and design dictating functionality.
triangulating, circular coring, and tapering are the main features you want to keep in mind, and the most important part, knowing how to apply, and integrate them.
So i think 7075 it is then...
zeropointbug
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens
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