I had a request from a vendor to change part made from 15-5 Steel AMS 5659 with (H1025) to 17-4PH AMS 5659 with Heat treat as per AMS 2759/3. I am in structural engineering side and wanted to compare static and fatigue properties. When I requested from the vendor about temper cond. I was told it...
After my first post I did some digging into brugn and also with a research paper. My findings are follows:
- At IRB, the skin between fasteners buckle locally. This do no deform the attached flange.
- At wrinkling, the skin has to deform in a way that it also deforms the attach stiffener. Thus...
Hoop stresses on fuselage
Hoop stresses on fuselage are mainly taken from the skin, there’s also a significant load taken by the frames. I have seen in many analysis that they ignore the contribution from the frame. Assuming that all hoop load is taken by skins that is a very conservative...
