用于光谱力学分析的显微拉曼外光路子系统

显微拉曼光谱法是一种无损非接触的微尺度实验力学技术。本文设计研制了可用于空间任意几何和偏振构型下力学测量的显微拉曼外光路子系统,用以开展复杂载荷环境下应力/应变的原位、在线测量。该外光路子系统采用观察光路与信号光路同轴设计,并基于笼式光机组件搭建光路。为标定、验证系统的性能与可靠性,本文采用所研制的外光路系统开展了Kevlar29纤维的拉伸实验和单晶硅的围压实验。实验结果表明,将外光路子系统用于光谱力学测量能够给出与商用系统性能一致的测量结果、精度及可靠性,并能够用于获取商用系统无法给出的几何与偏振构型下的光谱信息,从而实现复杂环境、载荷、应力状态下的光谱力学精细测量。

External optical sub-system of micro Raman spectroscopy for mechanical experiment and analysis

Micro-Raman spectroscopy is a non-destructive and non-contact microscale experimental mechanics method? In this paper, an external optical sub-system micro-Raman spectroscopy (EOS- MRS) for mechanical measurement under arbitrary geometry and polarization configuration in space has been designed and developed, which can be used for in-situ and on-line measurement of stress/ strain in complex loading environment. EOS adopts coaxial design of observation optical path and signal optical path, and builds the optical path based on cage optical machine assembly. In order to calibrate and verify the performance and reliability of EOS-MRS, tensile experiment of Kevlar 29 fibers and confining-pressure experiment of mono-crystalline silicon samples were carried out. Experimental results show that the measurement results, accuracy and reliability of EOS used in spectro-mechanical measurement are consistent with those of the commercial system. Moreover, it can be used to obtain spectral data of geometric and polarization configurations that cannot be given by commercial systems, So as to realize the precise measurement of spectral mechanics in complex load and stress environment.