The structural components of modern aircraft are com-monly

Chapter 5, Problem 5.103

(choose chapter or problem)

The structural components of modern aircraft are com-monly fabricated of high-performance composite mate-rials. These materials are fabricated by impregnatingmats of extremely strong fibers that are held within aform with an epoxy or thermoplastic liquid. After theliquid cures or cools, the resulting component is ofextremely high strength and low weight. Periodically,these components must be inspected to ensure that thefiber mats and bonding material do not become delami-nated and, in turn, the component loses its airworthiness.One inspection method involves application of a uniform, constant radiation heat flux to the surface beinginspected. The thermal response of the surface is mea-sured with an infrared imaging system, which capturesthe emission from the surface and converts it to a color-coded map of the surface temperature distribution. Con-sider the case where a uniform flux of 5 kW/m2isapplied to the top skin of an airplane wing initially at20C. The opposite side of the 15-mm-thick skin is adja-cent to stagnant air and can be treated as well insulated.The density and specific heat of the skin material are1200 kg/m3and 1200 J/kg?K, respectively. The effec-tive thermal conductivity of the intact skin material isk1?1.6 W/m?K. Contact resistances develop internal tothe structure as a result of delamination between thefiber mats and the bonding material, leading to a reducedeffective thermal conductivity of k2?1.1 W/m?K.Determine the surface temperature of the componentafter 10 and 100 s of irradiation for (i) an area where thematerial is structurally intact and (ii) an adjacent areawhere delamination has occurred within the wing.

Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.

Becoming a subscriber
Or look for another answer

×

Login

Login or Sign up for access to all of our study tools and educational content!

Forgot password?
Register Now

×

Register

Sign up for access to all content on our site!

Or login if you already have an account

×

Reset password

If you have an active account we’ll send you an e-mail for password recovery

Or login if you have your password back