研究目的
To estimate the stress-strain state of an outlet guide vane made from polymer composite materials using fiber-optic sensors for self-diagnosis and resource forecasting in aircraft propulsion systems.
研究成果
The proposed technique for estimating the stress-strain state using fiber-optic sensors demonstrates good convergence in low-gradient deformation zones (errors <12%) but higher errors in high-gradient areas. This highlights the importance of accurate sensor placement and suggests future improvements for enhanced reliability in structural health monitoring of composite materials in aviation.
研究不足
The method shows increased error in zones with high deformation gradients, indicating a need for precise sensor placement. The study is limited to laboratory conditions and specific OGV design, with potential for optimization in sensor integration and calibration.
1：Experimental Design and Method Selection:
The study involved experimental testing and numerical modeling to assess the stress-strain state of an outlet guide vane (OGV) made from polymer composite material (PCM) with embedded fiber-optic sensors based on Bragg gratings. The methodology included applying operational loads and comparing experimental data with numerical simulations.
2：Sample Selection and Data Sources:
The OGV sample was fabricated using an equally strong carbon cloth on an epoxy binder via autoclave molding. Fiber-optic sensors were mounted on the OGV surface in zones of maximum stresses.
3：List of Experimental Equipment and Materials:
Equipment included a universal servo-hydraulic machine (Zwick/Roell ProLine Z100), an interrogator (ASTRO X327), and software (ANSYS). Materials comprised carbon fiber-reinforced plastic with specified elastic properties.
4：Experimental Procedures and Operational Workflow:
The OGV was tested on the servo-hydraulic machine with a loading cylinder applying force through a rubber gasket at a speed of 1 mm/min. Loads ranged up to 1500 N. Fiber-optic sensor data was read out during tests, and numerical modeling was performed using ANSYS Workbench with a finite element method approach.
5：Data Analysis Methods:
Data from fiber-optic sensors was analyzed based on the relationship between strain and resonant wavelength changes. Numerical results were compared with experimental data to calculate errors and validate the method.
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