Infrared and Laser Engineering, Volume. 50, Issue 12, 20210711(2021)
Effects of environmental factors on infrared flash thermography nondestructive testing in outfield detection
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Fig. 4. Simulation result of temperature difference
Fig. 5. Simulation result of temperature contrast
Fig. 6. Positions of defect point and reference non-defect point in thermal image
Fig. 7. Experiment result of temperature difference Δ
Fig. 8. Experiment result of temperature contrast
Fig. 10. Simulation result of temperature difference Δ
Fig. 11. Simulation result of temperature contrast
Fig. 12. Thermal image
Fig. 13. Experiment result of temperature difference Δ
Fig. 14. Experiment result of temperature contrast
Fig. 15. Simulation result of temperature difference Δ
Fig. 16. Simulation result of temperature contrast
Fig. 17. Experiment result of temperature difference Δ
Fig. 18. Experiment result of temperature contrast
Table 1. Main parameter in the model
View tableView in ArticleTable 1. Main parameter in the model
Specimen thickness L/m Defect thickness d/m Defect depth l/m Specimen radius R/m Defect radius rd/m Heating pulse duration t/s Heating flux density q/W·m−2 0.0025 0.00005 0.0005 0.020 0.0075 0.002 0.84×107
Table 2. Thermal properties of materials
View tableView in ArticleTable 2. Thermal properties of materials
Material Density ρ/kg·m−3 Specific heat cp/kJ·kg−1·K−1 Thermal conductivity λ/W·m−1·K−1 GFRP[ 11 ]1900 1.2 0.3 Air(20℃)[ 12 ]1.205 1.005 0.0259 Air(30℃)[ 12 ]1.165 1.005 0.0267
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Yingtao Liu, Lulu Xu, Fangcheng He, Shuoning Li, Danggang Yang. Effects of environmental factors on infrared flash thermography nondestructive testing in outfield detection[J]. Infrared and Laser Engineering, 2021, 50(12): 20210711
Paper Information
Category: Photoelectric measurement
Received: Sep. 27, 2021
Accepted: --
Published Online: Feb. 9, 2022
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