Analysis of Thermal Shock and Stress with Infrared Optical Domes

Abstract:

The development of infrared optical materials is always closely related to the research and exploration of material science. The infrared optical domes bears shock and produces stress when the infrared optical domes mounted on the missile moving at a high speed is shocked by high temperature. According to aerodynamics theory and thermo shock theory, the surge current will be transferred to optical parts through holding up layer and warms the surface of optical parts when infrared optical parts are shocked by high temperature. A compress stress is formed on the hot external surface of optical parts forms and a tension stress is formed on the internal surface or optical parts under the circumstance of the edge of optical parts being fixed. The windows of optical parts become curvature radius of lens with the function of pressure difference which can cause aberration change. The brittle fracture of material will be caused if peak stress is beyond the strength which is permitted for infrared materials. Therefore, limits to design of windows thickness is proposed in this paper.

• Periodical: Applied Mechanics and Materials (Volumes 325-326)
• Pages: 332-335
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.325-326.332
• Online since: June 2013
• Authors: You Tang Gao, Shuo Liu, Yuan Xu
• Keywords: Domes, Infrared Optical Materials, Stress Analysis, Thermal Shock

References

[1] ZHANG Zhi-jian.Status quo and development of infrared optical materials.Yunnan Metallurgy, Vol. 35-41 (2000), p.35

[2] HUANG Qiu, CHEN Yi-qing, GAO Zhi-feng, ZHAI Xue-feng. Consideration to radome technology for IR seeker. Journal of Applied Optics, Vol. 840-843(2009),P840

[3] Shannnon R R., Mllsj P. ,Poolicveh M. Conformal optics technology enables window shapes that confrm to an application, not to conventional optical limitations. Photonics Spectra, Vol. 86-93(2001), p.86

[4] W J Tropf, M E Thomas, R K Frazer. Windows and domes past, present, and future. Proceedings of PSIE,. Vol.80-89 (2003) ,p.80

[5] Hong-Wei Zhao, Tian-Jin Hou,Bin Zhu. Military Optical Domes Techniques Researchful Developments. Laser & Infrared. Vol.927-931 (2010), p.927.

[6] Yu Huai-zhi. Infrared Optical Material. Beijing[M]: Dfense Industry Publishing House. Vol. 124-177 (2007), p.124.

[7] LIU Jing-he; ZHANG Ying;WANG Cheng-wei;ZHANG Xue-jian,SUN Jing;ZENG Fan-ming; CAO Ying; LI Feng. Study on preparation and performance of extra-far infrared optical material. Optical Technology. Vol.68-71 (2008), p.68.

[8] Gustin E, Wenseleers W, Leblans M, etal. Influence of OH-impurities on the relaxation of F centers studied with picosecond optical puhe. Radiat. Eff. Defects Solids, Vol.498-452 (1995),p.498

DOI: 10.1080/10420159508227275