【作者】 韩文梅；

【导师】 赵隆茂；

【作者基本信息】 太原理工大学 ， 固体力学， 2005， 硕士

【摘要】 军用飞机低空高速飞行时,鸟撞是航空界一直关注的问题。特别是风挡玻璃、雷达罩等迎风部件被撞几率极大。为此研制了各种型式的风挡玻璃,风挡玻璃不仅要求具有高的强度,而且工作中经受温度的剧烈变化是一个不可避免的问题。飞机风挡层合玻璃作为飞机上的重要部件,由两层或两层以上的硅酸盐玻璃和PMMA用透明中间层材料胶合而成,由于各层材料之间热膨胀系数的差异,在温度变化时,各层之间热胀冷缩和层间约束将产生温度应力。为了研究层合玻璃的热变形,为选择匹配的各层材质和粘接剂提供参考,本文将应用云纹干涉法对层合玻璃的热变形进行研究。 本文首次将云纹干涉法应用到国产层合玻璃热变形的研究中。首先建立并调试了高温云纹干涉法实验系统,应用此系统研究了飞机风挡层合玻璃的热应变。采用实时观测及更多还原

【Abstract】 Military aircrafts flying at high speed in low latitude, the problem of bird impacting is concerned by aviation circle, specially the parts against the wind as laminated glass as the windshield of aircraft, the radar covering etc. are impacted by birds at high probability. Various kinds of laminated glass are researched in our country. Not only has laminated glass as the windshield of aircraft high strength, but it can work in the environment of rapidly changed temperatures. Laminated glass as the windshield of aircraft is an important part of aircraft, andit is composed of two or more layers of silicate glass and PMMA. Because of the different coefficient of temperature expansion of every layer, it will produce temperature stresses caused by expanding with heat and contracting with cold and interlaminar restrainting. To offer references of choosing the fit structure, moire interferometry method is used to study thermal deformations of laminated glass in this paper.First of all, experimental systems of high temperature moire interferometry are built and debugged, and thermal strain of laminated glass is studied using the systems. By the methods of real time observation and fringe pattern collection systems recording fringe patterns at special temperature, thermal strain distribution of unsymmetric laminated structure is analyzed.When the temperature is changed, the deformations of prepreg layer are important for the steadiness of the whole laminated glass structure. The above techniques are also applied to the study of the change of thermal strains and distribution of prepreg layer. If only thinking the influence ofinterlaminar shear strains, laminated glass structure of the thickness of 1.25mm prepreg layer is superior to the one of 0.63mm prepreg layer.The study in this paper shows that moire interferometry can be used to investigate thermal strains of laminated glass.更多还原