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...
Hi Superstress,
I'm afraid l don't know the reason for the reduction, l suspect it may be due to a reappraisal of the test data submitted which derived the MIL-HDBK-5xx values.
Look at the presentation here...
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...
Did anyone mention ISAMI?
40,000 flight cases, 12 thermal flight cases, 3 material conditions, about 15 failure modes, at least 3 loops of load = 25 TB of results data.
Stress engineers become data controllers.
Welcome to the new world.
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...
Hi Farhnaz000,
Been using it since 1994 when it was introduced into the UK. Hyperworks suite is a top end product which has 'stolen' (don't sue me!) the market from under other software companies feet. I started a consultancy specialising in cost-effective engineering analysis in 1988, this...
[b]SwimBikeRun4342,
Your question surely relates to a compliance issue with regard to the chosen regulations for the plane? Example: Crashworthiness in CS-23 relates to 23.721 where the gear may be overloaded and will need to break away. This then requires that the tanks are protected...
Hi Greg,
I am a little unclear on why a hand calc approach is being contemplated, you asked for FEA calcs. I assume this is being done for work and not academic reasons? A piecewise curved beam of variable cross section under quasi-static or dynamic loading is a tough nut to crack by hand...
Hi Greg,
I have done a fair amount of stress work (inc FE) on light aircraft landing gear. The steel leaf of the C150 is a very straight forward design using conventional materials and attachments - hence it is possible to get very accurate correlation between a decent FE model and a full scale...
Hello,
I could have written your (edbgtr) piece myself such are the similarities. I have been working at a EU/NL based firm for some years as a consultant trying to get the stress methods and analysis into line with a major customer (who assemble a/c in Toulouse). Much of the customer's methods...
Hi 12alpha,
The analysis can be done using a web tool:
http://www.worldofkrauss.com/foils/search?contains=naca+1-H-15
Attached is the solution and answers
Regards
JWhttp://files.engineering.com/getfile.aspx?folder=a9c6b59a-36f7-4c80-a8e6-5d619b4ab278&file=NACA_1-H-15.jpg
