光弹性复合材料应力冻结研究

通过对航空工业标准“复合材料薄板压缩试验方法”中推荐使用的试验夹具测试段应力场的光弹性验证试验，介绍了光弹性复合材料的应力冻结技术。模型材料由光学玻璃纤维增强环氧树脂制成。为探索光弹性复合材料的应力冻结特性，曾对组分材料在室温与冻结温度下的机械与光学性能进行测定。此外，还提供了光弹性复合材料的冻结控温曲线及恒温时间的推荐计算公式。

Study on Stress Freezing Technique to Photoelastic Composite Models

The application of stress-freezing technique to birefringent composite models is discussed. Birefringent composite models are fabricated using epoxy resin reinforced with unidirectionally oriented of optic glass fibers. To explore the possibility of application of stress-freezing technique to birefringent composite models,the mechanical and photoelastic properties of the constituent materials at room and elevated temperature (at stress-freezing temperature of the resin) are determined. The temperature traverse curve of the stress-freezing of photoelastic composite and the recomment calculated formula of the time maintaining temperature are reported.