首页> 外文会议>IEEE Conference on Electrical Insulation and Dielectric Phenomena >Capacitive sensing for degradation assessment in bismaleimide/glass-fiber composites
【24h】

Capacitive sensing for degradation assessment in bismaleimide/glass-fiber composites

机译:双酰亚胺/玻璃纤维复合材料中的降解评估电容感应

获取原文

摘要

New aircraft designs increasingly contain more components made from polymer matrix composites, in both primary and secondary roles. This demands new monitoring techniques that emphasize the role played by polymer matrix degradation in the failure of these parts. The polymer matrix does not take significant load in tension but must transfer shear load. The present work investigates changes in surface chemistry due to accelerated thermo-oxidative aging on a bismaleimide (BMI) laminate system reinforced with woven glass fiber. BMI is used for high temperature applications up to 230 °C. Samples are isothermally aged at various temperatures whose selection is guided by degradation steps revealed by thermo-gravimetric analysis. Permittivity of aged samples is measured as a function of frequency from 200 Hz to 2 MHz, using a parallel-plate electrode design. Results are compared with measured interlaminar shear stress to assess the suitability of capacitive sensing as a method for nondestructive monitoring of thermo-oxidative aging in this material system.
机译:新的飞机设计越来越多地含有更多由聚合物基质复合材料制成的组件,初级和次要角色。这需要新的监测技术强调聚合物基质劣化在这些部件的失效中的作用。聚合物基质在张力中没有显着的载荷,但必须转移剪切载荷。本作者研究了用织造玻璃纤维增​​强的双聚物酰亚胺(BMI)层压系统加速热氧化老化的表面化学的变化。 BMI用于高温330°C的高温应用。样品在各种温度下是热老化的,其选择通过热重分析揭示的降解步骤引导。使用平行板电极设计,根据200Hz至2MHz的频率测量老化样品的介电常数。将结果与测量的层间剪切应力进行比较,以评估电容感应作为这种材料系统中热氧化老化的无损监测方法的适用性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号