アルミナの曲げ強度に及ぼす研削加工の影響と多重モードワイブル分布

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タイトル別名
  • The effect of grinding on bending strength of alumina and statistical analysis based on multi-modal Weibull distribution.
  • アルミナ ノ マゲ キョウド ニ オヨボス ケンサク カコウ ノ エイキョウ

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In this work, a new distribution function for fracture strength based on the multi-modal Weibull distribution function has been suggested in order to estimate the fracture behavior of brittle materials with ground surface. Furthermore, a new estimating method called “2-step estimation” for estimating the Weibull parameters accurately has been developed. The bending tests of alumina ceramics ground by a diamond wheel have been carried out and the following results were obtained.<br>(1) The fracture origins of alumina specimens with ground surface were controlled by the competition between the pre-existing cracks and the machining induced scratch cracks.<br>(2) The distribution function formulated in this work can explain the anisotropy of the bending strength of alumina specimens with ground surface fairly well.<br>(3) The bending strength of alumina specimens used in this experiment was proportional to -1/2 power of the abrasive diameter in the region larger than 40μm.

収録刊行物

  • 材料

    材料 36 (401), 166-172, 1987

    公益社団法人 日本材料学会

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