I am working on a landing gear design/stress which is using T1-3ALv2.5 tubing. Linear static analysis indicates higher than yield stresses in various places. I have refined the model to enable believable stresses to be recovered (FE is mixed 1d, 2d and 3d elements) and now need to define the...
This is a question for aero stress engineers.
We have a few locations showing negative MS where an external load (modification) is attached to a fuselage through the skin into a new reinforced channel or angle type fitting. The stack-up of parts on the fuselage side consists of skin double...
Some good work on this thread by edbgtr in 2011, thank you.
I am trying to use the calc method for a filler pad on angle and channel tension fittings which have been manufactured undersized. Hence they need throat pads applied - currently tentatively sized based on a nominal efficiency factor...
I am analysing joints that consist of metallic plates with thermoplastic (TP) skins. The load path uses a metallic plate 1 plus TP skin with load passing to a thicker matallic plate 2. The assumption for bearing is that the ult bearing joint allowable is the metallic plate 1 allowable plus TP...
Members,
I am looking for some data covering the generic Pa66 (unfilled) and possibly PA66 (13% GF filled) so that we can do some Nastran creep analysis. The CREEP card in nastran SOL 106 requires a lot of parameter input.
The loading situation is RT (20 deg C), constant load for 5yrs (say...
We have a number of metallic-metallic joints clamping sections of spanwise sub-spar comonents together with spreader plates. Loads are predominently in plane with minimal pull-thru loads (ie in axial direction of the bolts). We do not usually use washers in these joints.
Is anyone aware of...
I am finding that when i Create dimensions on a drawing catia defaults to mm
My options-- paramatures and measure units is set to inches
My part is created in inches
How do I get the dimensions to default to inches
We have an assy using a solid 5" bar of 316L with 24" dia x 3/8" thick flanges welded at 18" intervals. I need to look at suitable SN data for 316L but cannot locate any in my available sources. Any ideas where to find data?
I have a problem with Patran 2001r2a and laminate modeller. I am making layup files within LM but they are not being saved. I only noticed after making 10 or so files. The Plys are defined in Groups and l have plybooks generated so can re-create the layups OK, but l thought Patran/LM could...
