Abstract
In this paper, the stress measuring method by using the fluorescence lifetime is studied under tensile stress field. The test piece is made from acrylic resin, which contains a fluorescent material and subjected to the stress. When the laser beam is applied to the test piece, the fluorescence occurs and is measured by the streak camera. The fluorescence lifetime is given by using the least-square method. The relationship between the fluorescence lifetime and the stress is given with the various values of the stress speed as 5.6 kPa/s to 16.8 kPa/s. The fluorescence lifetime is increasing with increment of the stress linearly within the present stress speed.
