航空学报 > 2004, Vol. 25 Issue (6): 569-572

座舱玻璃划伤容限研究

张志林1, 姚卫星1, 傅祥炯2   

  1. 1. 南京航空航天大学飞行器系 江苏南京  210016;2. 西北工业大学飞机系 陕西西安  710072
  • 收稿日期:2003-10-13 修回日期:2004-04-16 出版日期:2004-12-25 发布日期:2004-12-25

Investigation on Scratch Tolerance of the Cabin Glass

ZHANG Zhi-lin1, YAO Wei-xing1, FU Xiang-jiong2   

  1. 1. Department of Aircraft Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Department of Aircraft, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2003-10-13 Revised:2004-04-16 Online:2004-12-25 Published:2004-12-25

摘要:

建立了座舱玻璃MDYB 3划伤模型,通过大量试验得出了MDYB 3玻璃表面裂纹断裂韧度和表面划伤扩展门槛值,建立了座舱玻璃划伤剩余强度准则和划伤容限计算方法,基于试验和分析结果,给出了9mm厚MDYB 3玻璃划伤容限值,为外场划伤分析处理提供了简便易行的方法。

关键词: 有机玻璃, 划伤, 损伤容限, 剩余强度, 门槛值

Abstract:

A scratch geometry model of aircraft cabin glass is established through the investigation on the causes of scratch yielding and census of the scratch defects. Specimens of MDYB-3 glass are tested to obtain the fracture toughness of surface cracks and the threshold of scratch propagation, then the prediction methods of the residual strength and the scratch tolerance for the MDYB-3 glass with scratch defects are developed. The scratch tolerance value of MDYB-3 glass plate of 9mm thickness are determined based on the experimental results and analysis, which provides a simple method for the treatment of scratch defects in aircrafts disposed outfield.

Key words: plexiglas, scratch, defect tolerance, residual strength, threshold value