摘要
针对碳纤维增强树脂复合材料低速冲击损伤的实时监测,设计将布拉格光纤光栅(FBG)传感器埋植在复合材料T型加筋板结构的三角填充区,在线监测复合材料T型加筋板冲击损伤过程。分别将FBG传感器埋植于复合材料层合板内部和复合材料T型加筋板的三角填充区,对比FBG传感器的埋入对复合材料层合板和复合材料T型加筋板力学性能的影响。结果表明,内埋FBG传感器的复合材料层合板试样的拉伸强度比未埋植传感器的层合板试样降低了约5%,但在FBG传感器的破坏应变范围内,FBG传感器可以准确、实时地监测复合材料的应变信号。将FBG传感器埋入复合材料T型加筋板的三角填充区,内埋FBG传感器的T型加筋板样件压缩破坏载荷与未埋植的样件基本一致。通过对比T型加筋板蒙皮上冲击位置、冲击能量对FBG传感器测得的冲击过程持续时间和最大应变值的影响,表明冲击过程持续时间随着冲击能量增大而延长,最大应变值随着冲击距离的增加呈下降趋势,而最大应变值随着冲击能量的增大呈上升趋势。利用FBG传感器测得的应变信号可初步实现对复合材料T型加筋板蒙皮冲击损伤位置及冲击能量的实时监测。
Fiber Bragg grating(FBG)sensors were embedded in triangle region of carbon fiber reinforced epoxy composite T-stiffened panels to real-time monitor the strain change during impact.By embedding the FBG sensors in the composite laminates and triangle region of the T-stiffened composite plates respectively,the effects of FBG sensors on the properties of the composite laminates and T-stiffened composite plates were studied.The results show that the tensile strength of the composite laminates with FBG sensors can be about 5%lower than the laminates without FBG sensors.Within the failure strain scope of FBG sensors,the FBG sensors could accurately monitor the strain signals real-time for the composite laminates.The compressive load of the T-stiffened panels with FBG sensors in triangle area is almost same as the T-stiffened panels without FBG sensors.Moreover,the effects of impact location and impact energy on the impact time and max-strain measured by the FBG sensors were studied.The results show that the impact time is increased with increasing impact energy.However,the max-strain is decreased with increasing impact distance,increased with increasing impact energy.By embedding the FBG sensors in triangle area of the composite T-stiffened panels,the impact location and impact energy of the composite T-stiffened panels could be monitored real-time by FBG sensors preliminarily.
作者
周玉敬
任明伟
刘刚
胡晓兰
范广宏
益小苏
ZHOU Yujing;REN Mingwei;LIU Gang;HU Xiaolan;FAN Guanghong;YI Xiaosu(State Key Laboratory of Advanced Forming Technology&Equipment,Beijing National Innovation Institute of Lightweight CO.LTD.,Beijing 100083,China;National Key Laboratory of Advanced Composites,Beijing Institute of Aeronautical Materials,AVIC Composites Center,Beijing 100095 China;Fujian Provincial Key Laboratory of Fire Retardant Materials,College of Materials,Xiamen University,Xiamen 361005,China;Center for Advanced Low-dimension Materials,Donghua University,Shanghai 201620,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2019年第10期2266-2274,共9页
Acta Materiae Compositae Sinica
基金
国家重点研发计划(2016YFD0700603)
航空科学基金(2016ZF68011)
江苏省重点研发计划(BE2015007)
福建省科技创新平台建设计划(2014H2006)
关键词
FBG传感器
低速冲击
损伤监测
复合材料
冲击定位
FBG sensors
low-velocity impact
damage monitoring
composites
impact localization
