I have found Bonanni's paper from NASA STI site and it has crippling test data for I, J C and Z sections. The data agree well when plotted against Fig 5.7.2.4 in Mil-17. Fig 5.7.2 (h) and Fig 5.7.2.1 (c) were data based on Flat plates. Looks like the crippling curve in Fig 5.7.2.4 is not bad. We...
Hi
I have been trying to use crippling charts for sizing composite frames before any test data become available, first come to mind was Fig 5.7.2.4 in Mil-HDBK-17F. I later found out by plotting against other data in Mil-17 that the curve in Fig 5.7.2.4 is rather unconservative.
Is there any...
Hi
Does anyone know what SLIM or VISION codes are? Are they commercial code or company propietary softwares? I heard that they do loads database management like FEADMS does at Boeing.
Lenosrep
There are two methods quoted by the Boeing manual. Huth's method was one of them. When I compared Huth's method with the effective thinkness method (which is in the same Boeing manual). The later one predicts greater stiffness and hence more conservative for the joint that I was looking at. But...
In order to model a major aircraft joint to correctly represent its stiffness in a FE model. I have been trying to find a suitable method for calculating fasteners stiffness. After evaluating methods used by major airframers and nasa pubs. It is not an easy choice to pick as they all come up...
