Evaluation of Surface Damage and Residual Strength in Ceramics due to Sphere Impact. 3rd Report, SiC Sphere Impact to SiC Specimen.

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  • 小球衝突損傷によるセラミックスの強度低下に関する研究　第３報　　炭化けい素平板への炭化けい素球衝突
  • ショウ キュウ ショウトツ ソンショウ ニ ヨル セラミックス ノ キョウド テイカ ニ カンスル ケンキュウ 3 タンカ ケイソ ヘイバン エ ノ タンカ ケイソ キュウ ショウトツ

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Abstract

In order to elucidate mechanisms of surface damage and to establish methods for evaluating strength degradation in ceramics subjected to dynamic contact with solid particles, silicon carbide sphere impact tests were carried out for silicon carbide specimens. A gas-gun-type apparatus was used for these tests. The residual strengths of the surface damaged specimens were measured by flexural tests. Damage analysis and residual strength evaluation were conducted. For the case of elastic damage (cone crack), the residual strength could be evaluated using indentation analysis, up to low speed range, in which the specimen was not ruptured by impact.

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