摘要
本文总结了用显微激光分析仪对一般纤维增强复合材料进行透射式光弹性研究的近期工作.针对纤维复合材料违反传统光弹理论的偏振光学行为,讨论了纤维,基体的双折射率不同及由纤维,基体界面两侧出射的光在Airy斑重叠区发生干涉等问题,从更一般的角度探讨了最近的文章中所提出的新光弹公式中所含两个滞后量的存在性.
This paper summarized a recent work on a kind of complex photoelastic phenomenon, which was observed in commonly used fiber reinforced composits by a newly developed special photoelastic instrument called Laser Optical Microscopic Analyser. As this phenomenon is difficult to be explained by conventional theory of photoelasticity, a photoelastic model was put forward, which is based on a monofilament composite model. The main meaning of it is as follows:
1. Fiber-reinforced composite is optically heterogeneous, the difference in birefringences and contents of fibers and their resin matrix affect the optical response described by I-0 curve,which was plotted by transparented light intensity against azimuth angle of the specimen.
2. The two pairs of orthogonal polarized beam, which passed separately through fiber and resin matrix nearby, interfere with each other within overlapped range of Airy marks of them. According to this,a matrix characterizing a fiber reinforced composite plate should be constructed by adding two of the Jones Matrix which represent fiber and resin respectively as homogeneous birefringent elements.
The work supported the new suggestion of so called two element retardations of fiber reinforced composites to some extent,but further study is needed to enlarge this model to multiple condition.
出处
《应用力学学报》
CAS
CSCD
北大核心
1992年第2期90-101,163,共12页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金青年基金
航空科学基金
关键词
纤维复合材料
光弹性
双折射
fiber-reinforced composites
photoelasticity
