[9a-E202-1~5] 1.5 Instrumentation, measurement and Metrology

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[9a-E202-4] Detection of Crack Initiation during Vibration Testing Using Mechanoluminescence

〇Yohei Kobuki¹, Masahiro Akei¹, Akira Mori¹, Yuki Fjio², Nao Terasaki² (1.Yanmar, 2.AIST)

Keywords:

Mechanoluminescence,stress,visualization

To identify stress concentration sites and crack initiation during vibration testing, the mechanoluminescence (ML) technique, which visualizes stress distribution through light emission, was applied. An ML coating was coated onto a diesel engine DPF, and the evolution of luminescence during the vibration test was observed. The results confirmed that localized increases in emission intensity and shifts in emission positions correspond to the initiation and propagation of microcracks. This method enables high-precision visualization of the location and timing of crack initiation, demonstrating its potential to improve vibration testing and structural health monitoring.