抄録
Cyclic ball indentation test was performed for polymer plastics in order to study its contact fatigue behavior. Acoustic Emission (AE) method was also employed to monitor the damage processing under the test. From the observation of indentation damage and AE analysis, it was reveled that monitored AE came from lateral cracks, which grew at subsurface area. We also evaluated the relationship between the indentation force, F, and the number of cycles to lateral crack initiation, N, Limits of force amplitude for initiating lateral cracks were examined under cyclic ball indentation test.
