研究目的
Investigating the impact of different anti-stick materials when loosely embedding an FBG inside a CFRP packaging for strain-free temperature sensing.
研究成果
Aluminum foil as an anti-stick material offers the best performance in terms of thermal conductivity and minimizes residual strain, leading to accurate temperature measurements with errors below 0.2°C in a medium size CFRP packaging under loads up to 13 kg. Larger packaging sizes further reduce residual strain.
研究不足
The study is limited to the evaluation of three specific anti-stick materials and their impact on the thermal and residual strain response of an FBG-based temperature sensor embedded in CFRP. The findings may not be directly applicable to other materials or sensor types without further investigation.
1：Experimental Design and Method Selection:
The study involves embedding an FBG loosely inside CFRP laminates with different anti-stick materials (aluminum foil, polymide film, release cloth) to evaluate their effects on temperature and residual-strain responses.
2：Sample Selection and Data Sources:
Three samples were prepared, each using a different anti-stick material. The size of the samples is 140 mm × 80 mm.
3：List of Experimental Equipment and Materials:
Equipment includes a hot-water bath for temperature testing, a cantilever for strain testing, and a T-type thermocouple for reference temperature measurements. Materials include carbon fiber prepregs, anti-stick materials (aluminum foil, polymide film, release cloth), and Teflon cloths.
4：Experimental Procedures and Operational Workflow:
The CFRP packaging is hot-pressed at 120°C and
5：08 MPa. Temperature response is tested by placing the samples in a hot-water bath. Strain response is tested by applying different loads to the CFRP packaging attached to a cantilever. Data Analysis Methods:
The temperature and strain responses are compared among the different anti-stick materials. The residual strain is calculated as a proportion of the strain measured by embedded strain gauges.
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