• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Thick-walled crack-free CFRP pipes: Stress reduction using atypical lay-up
【24h】

Thick-walled crack-free CFRP pipes: Stress reduction using atypical lay-up

机译：厚壁无裂纹CFRP管道：采用非典型敷设来降低应力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Carbon fiber reinforced plastic (CFRP) pipes are key structural elements for observation satellites. Significant radial tensile stress, however, is induced in thick-walled CFRP pipes during curing, leading to premature delamination failure and performance degradation. This study proposes a residual stress-reduction method to develop a thick-walled, crack-free CFRP pipe. We began by addressing the effect of stacking sequence on residual stress using theoretical and numerical analyses. The result led us to a novel stress-reduction method where circumferentially stiff 90 layers are gathered close to the inner surface. Two pipes were then manufactured: asymmetric and symmetric lay-ups. The radial strain development was evaluated using our fiber-optic-based monitoring system to confirm the effectiveness of the method. Finally, a thick-walled pipe was fabricated. No failure was observed during curing, successfully demonstrating a thick-walled, crack-free CFRP pipe. Additionally, a low-temperature test was conducted, and the pipe endured down to -120 degrees C, demonstrating a 140 degrees C lower operation temperature than that of a conventional symmetric pipe, which is highly beneficial for space applications. (C) 2015 Elsevier Ltd. All rights reserved.
机译：碳纤维增强塑料（CFRP）管是观测卫星的关键结构要素。但是，在固化过程中，厚壁CFRP管会产生明显的径向拉伸应力，从而导致过早分层失败和性能下降。这项研究提出了一种减少残余应力的方法来开发厚壁，无裂纹的CFRP管。我们首先使用理论和数值分析来研究堆垛顺序对残余应力的影响。结果使我们找到了一种新颖的减少应力的方法，该方法将周向刚性的90层聚集在内表面附近。然后制造了两根管子：不对称和对称叠层。使用基于光纤的监测系统评估了径向应变的发展，从而确认了该方法的有效性。最后，制造了厚壁管。在固化过程中未观察到任何故障，成功地证明了厚壁，无裂纹的CFRP管。另外，还进行了低温测试，该管耐低温至-120摄氏度，与传统的对称管相比，其工作温度低140摄氏度，这对空间应用非常有利。 （C）2015 Elsevier Ltd.保留所有权利。

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