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
- Infrared and Laser Engineering
- Vol. 50, Issue 12, 20210711 (2021)
Fig. 1. 3D cylindrical model
Fig. 2. 2D model simplified from 3D cylindrical model
Fig. 3. Arrangement of defects in the specimen
Fig. 4. Simulation result of temperature difference T (t ) in different testing ambient temperature
Fig. 5. Simulation result of temperature contrast C (t ) in different testing ambient temperature
Fig. 6. Positions of defect point and reference non-defect point in thermal image
Fig. 7. Experiment result of temperature difference ΔT (t ) in different testing ambient temperature
Fig. 8. Experiment result of temperature contrast C (t ) in different testing ambient temperature
Fig. 9. 2D model of uneven sunshine
Fig. 10. Simulation result of temperature difference ΔT (t ) in uneven sunshine and in homogeneous temperature
Fig. 11. Simulation result of temperature contrast C (t ) in uneven sunshine and in homogeneous temperature
Fig. 12. Thermal image t =1.102 s of the specimen in uneven sunshine before experiment
Fig. 13. Experiment result of temperature difference ΔT (t ) in uneven sunshine and in homogeneous temperature
Fig. 14. Experiment result of temperature contrast C (t ) in uneven sunshine and in homogeneous temperature
Fig. 15. Simulation result of temperature difference ΔT (t ) in different wind velocity
Fig. 16. Simulation result of temperature contrast C (t ) in different wind velocity
Fig. 17. Experiment result of temperature difference ΔT (t ) in different wind velocity
Fig. 18. Experiment result of temperature contrast C (t ) in different wind velocity
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Table 1. Main parameter in the model
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Table 2. Thermal properties of materials
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