Composite Shell Strain Detection for SRM Based on Optical Fiber Sensors

2nd International Conference on Materials Engineering and Nanotechnology

材料科学;物理学

Zhang, Lei^1 ; Chang, Xin-Long^1 ; Zhang, You-Hong^1 ; Chen, Xiang-Dong^1

Xian Hi-Tech Institute, Xian, Shanxi

710025, China^1

关键词: Composite material structure;    Fiber Bragg Grating Sensors;    High temperature;    Hydrostatic test;    Strain detection;    Strain transfer coefficient;    Strain variation;    Thermal protective coatings;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/205/1/012016/pdf
DOI  :  10.1088/1757-899X/205/1/012016

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

As a new passive sensor, fiber Bragg grating (FBG) sensors have provided a new idea for the SRM shell damage detection, which is to integrate the FBG sensor network in the material interior or to the surface to monitor the shell structure. However, it is difficult to embed the FBG sensor in filament wound composite material structure for the reason of large tension and high temperature in process of manufacture. Therefore we propose a new method that embed FBG sensor network between the composite shell surface and the thermal protective coating. The calibration of sensor is presented by tensile test and the strain transfer coefficient is gotten. It is certified by the hydrostatic test that the FBG sensors could precisely describe the strain variation and distribution of the composite shell and effectively improve the survival rate by embedding the FBG sensors between the composite shell surface and the thermal protective coating.