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首页> 外文会议>3rd International Workshop on Structural Health Monitoring, Sep 12-14, 2001, Stanford University >Built-In Diagnostics for Debonding in Sandwich Structures Under Extreme Temperatures
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Built-In Diagnostics for Debonding in Sandwich Structures Under Extreme Temperatures

机译：在极端温度下用于三明治结构脱胶的内置诊断程序

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摘要

An investigation is being conducted to develop a built-in diagnostic system to detect debond in sandwich composite structures with one surface exposed to cryogenic temperatures. The system consists of an embedded network of sensors and actuators, software, and hardware. An innovative technique is proposed to design an array of piezoelectric probing sensors to detect honeycomb core debond on the cold side of sandwich panels with the sensors embedded on the warmer side to prevent sensor failure due to the extreme low temperatures. A cost-effective manufacturing method is also being developed to implement a large array of the probing sensors in honeycomb core sandwich structures without altering the standard manufacturing procedures. Sandwich structures with a built-in probing sensor array have been manufactured and tested to evaluate the effectiveness of the system in detecting core debond and for assessing the survivability of the sensors under extreme temperatures. Preliminary tests indicated that core debond can be effectively detected by the proposed technique and, due to the design, the extreme temperatures do not present a threat to the sensor survivability.
机译：正在进行研究以开发一种内置诊断系统，以检测一个表面暴露于低温的夹心复合结构中的脱胶。该系统由传感器和执行器，软件和硬件的嵌入式网络组成。提出了一种创新技术来设计一系列压电探测传感器，以检测夹心板冷侧的蜂窝状芯脱胶，而传感器则嵌在较热的一侧，以防止由于极端低温而导致的传感器故障。还正在开发一种经济有效的制造方法，以在蜂窝芯夹层结构中实现大量的探测传感器，而无需更改标准制造程序。已经制造并测试了具有内置探测传感器阵列的三明治结构，以评估该系统在检测岩芯脱粘方面的有效性以及评估传感器在极端温度下的生存能力。初步测试表明，通过提出的技术可以有效地检测芯剥离，并且由于设计的原因，极端温度不会对传感器的生存能力构成威胁。

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