TAN Jian-guo, LI Yong, LI Wen-jia, et al. Visualization and quantitative assessment of impact damages of CFRP composites via millimeter wave testing[J]. 2018, (10): 12-15+18.
TAN Jian-guo, LI Yong, LI Wen-jia, et al. Visualization and quantitative assessment of impact damages of CFRP composites via millimeter wave testing[J]. 2018, (10): 12-15+18. DOI: 10.13873/j.1000-9787(2018)10-0012-04.
In view of in-service carbon fiber reinforced polymer( CFRP) composites are prone to impact damages
due to low speed impact load
severely influencing the service life and structural safety
visualization and quantitative assessment of impact damages in CFRP composites via millimeter wave( MMW) testing is investigated.A 3 D finite element simulation model of CFRP composites subject to impact damages is established. The characteristics and features of testing signals are analyzed.In parallel
a MMW testing platform with the frequency band from 8 GHz to 40 GHz is built up.Impact damage of CFRP are detected using rectangular waveguides probe by frequency-sweep.The key techniques of MMW detection and imaging of impact damage of CFRP composites are studied.