団体粒子の繰返し衝突による高分子材料の損傷

概要

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The erosion behaviors by repeated impacts with a particle (steel ball of 4 mm diameter) on the same material surface has been investigated to make clear the mechanism of sand erosion. The effects of impact velocity (V) and angle of attack (α) on erosion damage were discussed. The material used was polymethy1-methacrylate, and the impact velocity of particle was varied from 12 to 24 m/s, and the angle of attack was from 40 to 80 deg. From the observation of behaviors of crack growth caused by particle impact, it was found that the new 'erosion factor' presented as f= V^<3.6>・sin^<2.8>α・cos^<0.8>α would be very useful in understanding the erosion behavior, and it was concluded that the 'erosion factor' was closely related to the energy given to the material by impact. Moreover, the 'erosion factor' was found to be applicable for erosion by multiple particle impacts if 'f' was generalized as f= V^n・sin^<n1>α・cos^<n2>α (where n=n_1+n_2). A linear relationship was held between the erosion rate (R) and 'f'. By using this new generalized 'erosion factor' the erosion rate under arbitrary condition could be estimated.
社団法人日本材料学会の論文
1982-08-15