| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 618040 | Wear | 2011 | 6 Pages |
Cavitation erosion tests were carried out for plastics, i.e. for epoxy resin, polypropylene, high-density polyethylene and polyamide 66, and the relation between cavitation erosion resistance and the mechanical properties was examined. Cavitation erosion resistance of plastics ranges between half and 30 times that of carbon steel. The cavitation erosion of plastics was caused by fatigue fracture similar to metals. Since plastics have relatively small acoustic impedance, the impact loads applied by bubble collapse become very small. Therefore, the resistance and the incubation period of cavitation erosion of plastics can be evaluated in terms of bubble collapse impact energy and the strain energy obtained from the fatigue strength.
► It was found that the cavitation erosion resistance of plastics ranged from one half for epoxy to 30 times for polyamide 66 as compared with that for low carbon steel. ► Impact loads on plastic surface are lower than those for metals, because plastics have very low acoustic impedance. ► Cavitation erosion proceeds in a fatigue manner. ► Therefore, the erosion resistance can be evaluated in terms of the impact energy and fatigue strength.
