S0304-1-5 白色放射光による超細粒鋼の疲労き裂近傍のひずみ分布測定(回折法による材料評価)

概要

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For engineering components with cracks, it is very important to evaluate the reliability for fracture. The X-ray diffraction method is now widely used to measure non-destructively the loading and residual stresses in crystalline materials. Synchrotron radiation sources provide the X-rays with extremely high intensity as well as a narrow divergence. The high intensity X-rays with a narrow divergence enables stress measurements in a localized region. In the present study, strain distribution near the fatigue crack in SUF plate was measured by polychromatic X-ray from synchrotron radiation at SPring-8. The spatial resolution in the direction parallel to the crack propagation direction was 0.1 mm. The measured strain distribution was compared with that calculated by the FE analysis. The strain distribution measured at several applied stress levels agreed very well with the calculated results.
社団法人日本機械学会の論文
2009-09-12