| 摘要 |
PURPOSE:To predict the fatigue damage of a structure which has excellent precision and detection performance by fitting a prediction piece with a cut to the structure, and detecting its cracking. CONSTITUTION:The prediction piece 2 made of the same material with the structure 1 is fitted to a fatigue cracking dangerous position of the structure 1. Fatigue cracking starts at the position of the cut 3 earlier in the piece with the cut 3 than in the structure 1. The cracking starting at the cut 3 stops at a hole 4. The hole 4 has a smooth internal-diameter surface, so notch effect is small and the growth of the cracking to the structure body 1 is impeded. For the purpose, the generation of cracking in the piece 2 is detected to know the fatigue damage of the structure 1 before harmful cracking is generated in the structure 1. |
