Degradation behaviour and damage mechanisms of carbon fibre reinforced polymer composite laminates subjected to laser irradiation

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES
Patrick K. Kamlade , Jojibabu Panta , Max Mammone , Richard (Chunhui) Yang , Richard P. Mildren , John Wang , Matthew Ibrahim , Rodney Thomson , Y.X. Zhang
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Abstract

This study presents a comprehensive and insightful investigation into the thermal degradation and damage mechanisms of carbon fibre reinforced polymer (CFRP) composite laminates exposed to continuous wave laser irradiation with a Gaussian beam profile. The effects of laser power, beam diameter, and exposure time were explored to reflect practical scenarios such as material processing, maintenance, and damage assessment. Thermogravimetric analysis (TGA) was first carried out in both nitrogen and air environments to understand the thermal stability and degradation behaviour of the CFRP material. Initial laser tests were conducted at 30 W and 40 W using a beam diameter of 3.46 mm to assess early-stage damage. These results informed a more intensive study using a higher laser power of 98 W with beam diameters of 3.18 mm and 5.70 mm, where specimens were irradiated until complete perforation. Thermal imaging was used to monitor surface temperature evolution on both front and back sides during irradiation. For the 98 W cases, the larger beam diameter required a 53 % longer exposure time to achieve perforation, highlighting the role of power density in damage progression. Post-irradiation analysis using scanning electron microscopy (SEM), ultrasonic C-scans, and micro-focused X-ray computed tomography (micro-CT) revealed fibre sublimation, matrix decomposition, cone-shaped perforations, and interlaminar cracking. The results provide valuable insights into how CFRP materials respond to high-intensity laser exposure and can support the development of strategies to mitigate damage and improve structural performance in real-world applications.
激光辐照下碳纤维增强聚合物复合材料层合板的降解行为及损伤机理
本研究对碳纤维增强聚合物(CFRP)复合材料层合板在高斯光束连续波激光照射下的热降解和损伤机制进行了全面而深入的研究。探讨了激光功率、光束直径和曝光时间的影响,以反映实际情况,如材料加工、维护和损伤评估。热重分析(TGA)首先在氮气和空气环境中进行,以了解CFRP材料的热稳定性和降解行为。初始激光测试在30w和40w下进行,光束直径为3.46 mm,以评估早期损伤。这些结果为使用更高的激光功率(98 W,光束直径分别为3.18 mm和5.70 mm)进行更深入的研究提供了信息,其中样品照射直到完全穿孔。热成像技术用于监测辐照前后表面温度的变化。对于98 W的情况,更大的光束直径需要53%的暴露时间才能实现穿孔,这突出了功率密度在损伤进展中的作用。使用扫描电子显微镜(SEM)、超声c扫描和微聚焦x射线计算机断层扫描(micro-CT)进行辐照后分析,发现纤维升华、基质分解、锥形穿孔和层间开裂。研究结果为CFRP材料在高强度激光照射下的反应提供了有价值的见解,并可以支持在实际应用中减轻损伤和提高结构性能的策略的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Composites Part C Open Access
Composites Part C Open Access Engineering-Mechanical Engineering
CiteScore
8.60
自引率
2.40%
发文量
96
审稿时长
55 days
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