A Basic Approach to Repeated-Impact Erosion of Ductile Material with Solid Particle at Low Velocities

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  • インパクト・エロージョンに関する基礎的研究
  • インパクト エロージョン ニ カンスル キソテキ ケンキュウ

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Abstract

The experiments of repeated impacts with steel balls of 20mm in a diameter on the same spot of the plate specimen surface were preformed in order to clarify a mechanical parameter taking a dominant part for the erosion damage. The observation of the specimen surface was made every a few cycles to measure the number of impacts when a erosion-lip was removed, that if defined as a erosion life. The measurement of dynamic stress histories near the crater gave the useful information of applied pressure to the crater by the steel ball. The pressure was successfully used to explain the effect of the impact angle on the erosion life observed in the experiments. IT was concluded that the pressure is one of the important parameters which dominate the erosion damage.

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