光弹性复合材料梁应力分析与条纹值测定

Stress Analysis and Measurement of Material Fringe Value for Photoelastic Composite Meaerial Beam

研究了纤维增强光弹性复合材料梁在正对称 ,反对称集中荷载作用下的应力特征 ,提出了用两根直梁在正对称和反对称四点弯曲作用下 ,分别直接测定正交异性光弹性的 3个材料条纹值 f L、f T、f L T的新方法 ,与现有的两种方法相比 ,新方法概念明确 。

The characteristiies of the internal forces of single-direction fibre reinforced composcte material in symmetrie and antisymmetric four points bending beam are investigated. A pure shear cross-section has been constituted, a new method which can be employed to mearsure all the three fringe values f L? f T and f LT of photoelastic composite material with a four points bending model is presented here. In comparing with the above two method of using three straight bar specimens under extension and a circular plate subjected to the radial compression to measure fringe values, it is seen that the new method is simpler in struture and easier in measurement.