Recent content by Andries

I agree with the objections; if it ain't broke don't fix it. Andries

Hi, I don't think that this forum is appropriate to your query; try road construction or similar, if there are such forums. Regards, Andries

I agree with LittleInch. Andries

Looks like the aircraft entered what is known as a deep stall; this occurs when the wings blank out the empennage, making the plane almost impossible to control. This occurs with T -tail aircraft and the result is usually a flat spin. The obvious question is why the aircraft went into a deep...

South Africa building collapse now 26 deaths and about 30 still missing. This is a big can of worms.

The company I worked for did maintenance of military aircraft. Something went wrong during the night and it was quite a sight next morning to see a row of jet fighters covered in foam with only the vertical stabilisers protruding. Andries

The British Bristol 188 supersonic research aircraft of the late 1950s had a stainless steel airframe to deal with aerodynamic heating. Titanium was still in the future for aircraft. Andries

Is there a reward?........

Hi aldomoul, As FEA way alluded to you must have a thorough grasp of basic mechanics of materials. Also read up on basic elasticity theory. You must be able to do rough "sanity" checks on your results using hand calculations on a simplified representation of the part in question. Another...

Pretty spectacular!

Thanks SAITAETGrad, I fortunately have Cook's book and copies of Taig's notes; they really get down to the nitty-gritty of FE modeling. (As far as FE text books go Cook et al is one of the best.) On further reflection and the replies above I can now understand the use of a single CQUAD4 as a...

Thanks Gentlemen, Yes, it is for a loads model. Regards, Andries

Good Day Colleagues, I noticed that in two different aircraft company finite element manuals the light frames typically used in airliner fuselages are represented by Nastran CRODS for the flanges of the stringer and a single QUAD4 element representing the web. Surely a single QUAD4 will be too...

Hi All, This thread is very interesting to me, a 77 year old museum piece. Yes, this surely the way to go. I suppose that you all have systems in place for archiving your calculations and keeping them up to date by configuration control (I'm from the aero industry where this is crucial)...

The idea of hundreds or even thousands of such aircraft (flying autos?)in the air, how on earth is this going to controlled? Road safety is bad enough, but this? Andries