一、前言 有机玻璃用作飞机透明座舱材料已有几十年的历史了。随着航空的发展,要求材料具有耐疲劳特性,以保证飞行安全。有机玻璃在常温下是一种脆性材料,在动载荷作用下易产生银纹和裂纹等缺陷。这些缺陷的产生危及材料的安全使用。所以近年来国外飞机座舱逐渐采用疲劳设计思想。目前国内几个主要机种也将采用疲劳设计,用材料的疲劳试验数据作为估算新机座舱寿命和老机座舱延寿的重要根据之 First, the foreword Plexiglass aircraft used for transparent cockpit material has several decades of history. With the development of aviation, materials are required to have fatigue-resistant characteristics to ensure flight safety. Plexiglass is a brittle material at room temperature, easy to produce silver and crack defects under dynamic load. These defects endanger the safe use of materials. Therefore, foreign aircraft cockpit gradually adopted the concept of fatigue design in recent years. At present, several major domestic models will also use fatigue design, fatigue test data using the material as a basis for estimating the life of a new cockpit cockpit cockroach and an important basis for life extension