Evaluation of Surface Damage and Residual Strength in Ceramics due to Sphere Impact. 2nd Report, Si3N4 Sphere Impact to Si3N4 Specimen-Elastic Analysis.

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  • 小球衝突によるセラミックスの表面損傷と残留強度の評価　第２報　　窒化けい素平板への窒化けい素球衝突‐弾性解析
  • ショウ キュウ ショウトツ ニ ヨル セラミックス ノ ヒョウメン ソンショウ ト ザンリュウ キョウド ノ ヒョウカ 2 チッカ ケイソ ヘイバン エ ノ チッカ ケイソ キュウ ショウトツ ダンセイ カイセキ

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In the 1st report, it was shown that it was possible to apply an elastic indentation theory to the evaluation of surface damage of ceramics due to sphere impact, although this was limited to low velocities in which elastic damage dominated. In this research, further investigation on the applicability of the theory to the residual strength evaluation was conducted. In the case that elastic damage or cone crack was related in the final fracture, the residual strength of ceramic specimens damaged by sphere impact was estimated using the elastic indentation theory and conventional fracture mechanics. Good agreement between estimated curves and test results were obtained.

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