108 エリアディテクタ方式の中性子応力測定(構造部材や加工プロセスの信頼性を支える計測・評価技術)

概要

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A fundamental study was carried out on an application of an area detector to neutron stress measurement. A neutron image plate (NIP) was used in this experiment to obtain neutron diffraction rings of polycrystalline steel specimen. The diffraction data were stored on a NIP and were converted to digital image data. Strains were obtained from these data and were analyzed to determine stress using the cos a method. Though these stresses were different from applied stresses, they increased in proportion to applied stresses. Namely, the differences between measured and applied stresses were almost constant during loading. Based on these experimental results, two practical methods were proposed for determining exact stress using a NIP. The stresses obtained using one of these methods showed good agreement with applied stresses. From these results, it is concluded that we can obtain mean stress in materials using neutron diffraction technique with an area detector.
一般社団法人日本機械学会の論文
2009-11-06