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机构地区:[1]中国航发湖南动力机械研究所,湖南株洲412002
出 处:《科技创新与应用》2023年第22期23-26,共4页Technology Innovation and Application
摘 要:为准确判定推进系统粘接层的“半固化状态”,保证其粘接性能,提高粘接质量,采用压电阻抗技术实时监测粘接层固化反应过程。该文构建一维粘弹性阻抗模型,设计粘接层固化过程阻抗实时监测系统,利用共振频率处的阻抗实部峰值表征粘接层固化状态。监测结果表明,随着粘接层固化反应的进行,阻抗实部峰值逐渐减小,直至粘接层完全固化后,阻抗实部峰值保持平稳,反映粘接层固化状态的变化,阻抗实部峰值的下降率能够作为判定粘接层“半固化状态”的重要指标。In order to determine the semi-curing state of adhesive layer accurately,ensure the adhesion properties and improve the quality of propulsion systems,piezoelectric impedance technique is used to monitor the curing process of adhesive layer in real time.A one-dimensional viscoelastic electro-mechanical impedance model is constructed and verified by experiment research.A real-time piezoelectric impedance technique monitoring system of curing process of adhesive layer is designed.The curing state of adhesive layer is characterized by the peak value of real part of impedance signal at resonance frequency.The experimental results show that the resistance peak value decreases gradually with the curing reaction of the adhesive layer,and remains stable until the adhesive layer is completely cured,which completely represents the change of the curing state of the adhesive layer,and its"half curing"state can be determined by the rate of decline of the peak resistance.
关 键 词:推进系统 粘接层 半固化状态 压电阻抗技术 实时监测
分 类 号:V435[航空宇航科学与技术—航空宇航推进理论与工程]
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