Prototype fretting-wear testing machine and some experimental results

摘要

A new prototype fretting-wear testing machine is developed, and its performance is evaluated. In thistesting machine, a spherical specimen is oscillated by a lead-zirconate-titanate semiconductor (PZT)actuator, driven by means of computer control. Thus, an arbitrary input waveform, such as sinusoidalwave, triangular wave and so on, can be easily operated to a spherical specimen. This is the specialfeature of our testing machine. As an example, a fretting experiment is carried out, using a steel flatspecimen and a bearing steel sphere specimen. A sinusoidal input wave is added by a PZT actuator.It is clarified that there is a boundary fretting amplitude, beyond which fretting wear mass or volumeincreases abruptly.