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模擬デブリの破壊試験による変形・破壊挙動を予測する解析手法の確立

Development of analysis method to predict the state of deformation and fracture using synchrotron radiation during the fracture test of Simulated Debridement

冨永 亜希; 菖蒲 敬久  ; 佐藤 志彦   ; 城 鮎美*; 桑水流 理*; 宇埜 正美*

Tominaga, Aki; Shobu, Takahisa; Satou, Yukihiko; Shiro, Ayumi*; Kuwatsuru, Osamu*; Uno, Masayoshi*

模擬デブリを作製し、破壊試験中のX線CTによる内部変形観察及びX線回折法によるひずみ計測を行った。予測困難と言われている模擬デブリの破壊強度に材料強度の観点からアプローチすることを目的とする。SPring-8にあるJAEAビームラインBL22XUにて、X線CTとX線回折法を用いた測定を行ったその結果を報告する。このCT画像の中に、ZrO$$_{2}$$相,Al$$_{2}$$O$$_{3}$$相,空隙それぞれを確認した。このサンプルのX線回折からのひずみ解析は、試料中央を含む厚さ0.1mm程度の平板の平均ひずみより得た。解析結果、この2相からの格子ひずみの和がマクロひずみよりも小さい結果を得、これが空隙の変形量であると予測している。

During the fracture test of the simulated debris, the internal deformation and the strain were evaluated by X-ray CT and X-ray diffraction using synchrotron radiation source, respectively. The purpose of this study is to determine the fracture strength of the debris, the prediction of which is thought to be difficult, from the CT images and strain amounts during the fracture test. We'll report the results of measurements using synchrotron X-ray CT and diffraction at the JAEA beamline BL22XU on SPring-8. ZrO$$_{2}$$ phase, Al$$_{2}$$O$$_{3}$$ phase, and voids were observed in the CT image. In the strain analysis by X-ray diffraction of this sample was obtained from the average strain of the sample flat plate with the thickness of about 0.1 mm including the center of the sample. We consider that the difference between the macrostrain and microstrain is the amount of void deformation.

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