Thermophysical Properties Mapping of Composites by Lock-in Thermography: Applications on Carbon Fiber Reinforced Plastics
Thermophysical Properties Mapping of Composites by Lock-in Thermography: Applications on Carbon Fiber Reinforced Plastics
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DOI：
10.1007/s10765-022-03109-7
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发表时间：
2022-10
影响因子：
2.2
通讯作者：
A. Alasli;Ryohei Fujita;H. Nagano
中科院分区：
文献类型：
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作者：
A. Alasli;Ryohei Fujita;H. Nagano
提出了一种利用锁相热成像技术测量复合材料热物理性能的方法。该方法是基于分析周期性激光加热引起的热响应分布，这使得同时高空间分辨率映射的有效面外热扩散率，热导率和体积热容的表面上的材料。我们使用参考材料验证了该方法，并证明了其在可视化层压碳纤维增强塑料和碳纤维增强不连续纤维热塑性塑料的有效性能方面的能力。结果表明，基于LIT的方法具有较高的重现性和灵敏度，可以观察纤维取向对有效性能的影响。所提出的方法将是有用的，在复合材料的热研究，缺陷检测，并调查组件的几何布置对热物理性能的影响。
We propose a versatile method for measuring the thermophysical properties of composites by means of lock-in thermography (LIT) technique. The method is based on analyzing the thermal response distribution induced by periodic laser heating, which enables simultaneous high-spatial-resolution mapping of the effective out-of-plane thermal diffusivity, thermal conductivity, and volumetric heat capacity over the surface of the material. We validate the method using a reference material and demonstrate its capability in visualizing the effective properties of laminated carbon fiber reinforced plastic and carbon fiber reinforced thermoplastic with discontinuous fibers. The results showed that the LIT-based approach has high reproducibility and sensitivity, which allows observing the effect of fiber orientations on the effective properties. The proposed method will be useful for thermal research in composites, defect detection, and for investigating component geometric arrangement effects on the thermophysical properties.