Journal
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
Volume 64, Issue 12, Pages 2586-2594Publisher
SCIENCE PRESS
DOI: 10.1007/s11431-020-1862-x
Keywords
stress measurement; real-time monitoring; organic mechanoluminescence
Funding
- National Key Research and Development Program of China [2018YFC0808600]
- National Natural Science Foundation of China [52075368, 51605325, 11772219]
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A real-time and visible stress monitoring method based on a pure organic MRL was proposed, utilizing TPE-4N to generate visible mechanoresponsive fluorescence for stress measurement in metal specimens, showing good accuracy in tension tests and potential for new opportunities in stress distribution monitoring.
A real-time and visible stress monitoring method based on a pure organic mechanoresponsive luminogen (MRL) was proposed in this work. 1,1,2,2-tetrakis(4-nitrophenyl)ethene (TPE-4N) could produce ultrasensitive and visible mechanoresponsive fluorescence. Metal specimens were coated with a uniform TPE-4N film, wherein mechanical deformation was transformed into visible fluorescence. Tensile tests were conducted to determine the calibration relationship between the stress value and fluorescence intensity. The accuracy of stress measured using the organic MRL method was investigated on single-edge notched tension specimens. Results show that the stress distribution obtained using the proposed method agrees well with that calculated using ANSYS simulation. The organic MRL method may open up new opportunities for large-scale, full-field, on-site monitoring of stress distribution in complicated structural components.
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