 correl theoret photo-thermoelast thermal stress ideal wing structur correl theoret photo-thermoelast thermal stress ideal wing structur complet exploratori program describ previou paper photo-thermoelast method appli experiment evalu thermal-stress theori techniqu correl theori analyz transient thermal stress ideal wing structur high-speed aircraft theori investig repres ideal wing model differ simplifi assumpt temperatur distribut skin web theori evalu duplic boundari initi condit plastic model correl theori observ fring order nondimension form gener conclus reach correl theori experiment simplifi assumpt concern thermal behavior flang thermal stress predict theori higher experiment observ case discrep great 30 cent 