スラリー流れによる高分子材料の***ージョン損傷 : 粒子衝突速度ならびに角度の影響

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Slurry erosion was measured for three kinds of polymeric materials placed in the flowing fluid. The motion of particles around the specimen, which has an important effect on the damage behavior, was analyticauy calculated. The erosion rate changed remarkably at a certain point of erosion curve. At this point the mechanism of damage showed the transition from ductile type damage to brittle one. The erosion rate varied with the kind of materials. A power law relation held between the erosion rate and the impact particle velocity obtained from calculations, and the value of exponent varied with the mechanism of damage. The effects of vertical and horizontal components of the impact particle velocity on the erosion rate in each mechanism were discussed. In the brittle type damage, the erosion rate depended only on the vertical component of the impact particle velocity. On the other hand, in the ductile one, the erosion rate was influenced by both components of the impact particle velocity. Therefore, the impact particle angle where the erosion rate became the maximum varied with the erosion mechanism. In the case of the brittle type damage, the relation between the vertical component of impact particle velocity and the number of impact particles during the incubation period was similar to the S-N diagram in fatigue. A threshold value of the vertical component of impact particle velocity to cause the brittle type damage was also recognized.
社団法人日本材料学会の論文
1992-05-15

スラリー流れによる高分子材料の***ージョン損傷 : 粒子衝突速度ならびに角度の影響

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