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Why aluminium is used in aircraft?
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Posted by: Scott

11/01/2003, 07:41:29

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Hello,

I have a presentation to do at college on why aluminium is used in aircraft instead of other metals.

What is design stress involved and what are the main characteristics of aluminium that make it ideal for the job?

Also, are there any flaws in using aluminium in aircraft?

I appreciate any help at all







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Re: Why aluminium is used in aircraft?
Re: Why aluminium is used in aircraft? -- Scott Post Reply Top of thread Forum
Posted by: fvierheller

11/06/2003, 16:56:04

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Tooling cost is a driven factor

Material properties are not fully develop for each composites, and fiber orientation will change the properties, that been said, is hard to perform FEA analysis for composites, multidirectional isotropic material are not supported jet

 







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Why aluminium is used in aircraft?
Re: Why aluminium is used in aircraft? -- Scott Post Reply Top of thread Forum
Posted by: RKimball

11/01/2003, 11:07:41

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Weight!!!!! per strength per cost.

But, be it known, 4140, 4130, 15-5 ( and other stainless), magnesium, composites, and titanium are used in fair amounts too.

Landing gear components will use large amounts of 4140 and other strong materials. The engines are often held with 15-5 PH stainless steel trunions and pins.

Mostly the body structure is framed and fitted with aluminum with the skin being smoothly attatched to the frame structure, thus providing considerable strength. This technique was developed during WWII and until recently hasn't changed much.

But now, acraft structure is changing rapidly as composites are replacing the frame structures and skins with more ridigity and less weight. Plus, composites can be built up into exotic shapes and thicknesses that are hard to accomplish without several aluminum fittings and one or more skin sections. Composite parts can be placed on the assembly in less, light, easy to install sections. Composite weight and strength factors can be controled and engineered which would require difficult to machine and manufacture metal fittings, and the skin is often already designed in.

I hope I have addressed some less advantages qualities of aluminum in the composite statement, there are others. I'll leave the door open for others to answer to those.

-randy-




** The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, don't fail to listen to suggestions. -randy-

Modified by RKimball at Sat, Nov 01, 2003, 11:14:13

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Re: Why aluminium is used in aircraft?
Re: Why aluminium is used in aircraft? -- RKimball Post Reply Top of thread Forum
Posted by: cramog

11/14/2003, 13:53:36

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There is an Australian Site http://hsc.csu.edu.au/engineering_studies/aero_eng/
where you may get some help.

Check out the links on www.metalbashatorium.com/links.htm and other pages on the site for help.

Glenn.







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Re: Why aluminium is used in aircraft?
Re: Re: Why aluminium is used in aircraft? -- cramog Post Reply Top of thread Forum
Posted by: Scott

11/24/2003, 13:46:42

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I really appreciate the help!

One week left before i have to do my presentation, wish me luck!

One last request, if anyone knows of any sources of movie clips that have relevance to aluminium/testing it and aircraft, i would be much obliged!

Thanks again.







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