赤外線ハイブリッド応力解析法における試験片板厚と繰返し周波数の影響

抄録

Recently, the effect of heat conduction has been considered to be a big problem in thermoelastic stress measurement. Then, the effect of heat conduction was investigated by the experiment which changed the material, thickness of the specimen and frequency of a cyclic load. Though the infrared hybrid method was developed to separate individual stress components, it has the effect by heat conduction in the infrared stress measuring method. Therefore, an error will arise in the infrared hybrid analysis. Then, the system which corrects the error by the inverse analysis was developed. Thereby, the accuracy of the stress intensity factor was able to be raised. Furthermore, the accuracy of hybrid method considering to heat conduction was discussed in comparison with the 3-D finite-element analysis and 2-D hybrid method.