국내 최대 기계 및 로봇 연구정보

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타이틀	THERMOELASTIC ANALYSIS OF HYPER-X CAMERA WINDOWS SUDDENLY EXPOSED TO MACH 7 STAGNATION AEROTHERMAL SHOCK
저자	William L. Ko and Leslie Gong
Keyword	Circular disk; Dynamic pressure bending; Mach 7 heating; Mechanical stresses; Thermal shock; Thermal stresses.
URL	http://www.dfrc.nasa.gov/DTRS/2000/PDF/H-2420.pdf
보고서번호	NASA-TP-2000-209030
발행년도	2000
출처	NASA Dryden Flight Research Center
ABSTRACT	To visually record the initial free flight event of the Hyper-X research flight vehicle immediately after separation from the Pegasus?booster rocket, a video camera was mounted on the bulkhead of the adapter through which Hyper-X rides on Pegasus. The video camera was shielded by a protecting camera window made of heat-resistant quartz material. When Hyper-X separates from Pegasus, this camera window will be suddenly exposed to Mach 7 stagnation thermal shock and dynamic pressure loading (aerothermal loading). To examine the structural integrity, thermoelastic analysis was performed, and the stress distributions in the camera windows were calculated. The critical stress point where the tensile stress reaches a maximum value for each camera window was identified, and the maximum tensile stress level at that critical point was found to be considerably lower than the tensile failure stress of the camera window material.