New Method of Full-Field Stress Analysis and Measurement Using Photoelasticity

New Method of Full-Field Stress Analysis and Measurement Using Photoelasticity
复制标题

利用光弹性进行全场应力分析和测量的新方法

DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
W. Broere
W. Broere
中科院分区：
--
文献类型：
--
作者：
J. Dijkstra;W. Broere

文献摘要

被引文献

相似文献

光弹性测量提供了一种手段，以获得一个有意义的代表性的应力状态在一个平面应变样品的整个区域的颗粒材料，而不需要将应力传感器内的样品。这种方法利用非晶体材料在受到应力时变得光学各向异性的特性。为了测量通过由玻璃颗粒和孔中具有匹配折射率的液体构建的模型传输的光束的所得相对延迟，已经构建了全场偏振镜。该设置能够仅用七个强度测量来表征样品全场的应力状态。以平面应变桩身贯入试验为例进行了分析。
Photoelastic measurements provide a means to obtain a meaningful representation of the stress state in a granular material over the full area of a plane-strain sample without the need to place stress transducers inside the sample. This method uses the property of non-crystalline materials to become optically anisotropic when put under stress. To measure the resultant relative retardation of a light beam transmitted through a model built from glass grains and a liquid with a matching refractive index in the pores, a full-field polariscope has been built. This setup is able to characterize the stress state in the full-field of the sample with only seven intensity measurements. A plane-strain pile penetration test is used as an example.