Research on high-frequency small-load fatigue testing device driven by piezoelectric actuator.

Area of Science:

• Materials Science
• Mechanical Engineering
• Nanotechnology

Background:

• Traditional fatigue testing devices often lack the precision and responsiveness required for small-load applications.
• Piezoelectric materials offer unique advantages for actuation due to their electromechanical properties.

Purpose of the Study:

• To propose and analyze a novel small-load fatigue testing device actuated by piezoelectric material.
• To detail the energy conversion and motion transfer mechanisms within the device.
• To evaluate the performance characteristics of the developed piezoelectric fatigue testing device.

Main Methods:

• Detailed analysis of the energy conversion and motion transfer principles.
• Experimental testing of the fatigue testing device operating at resonance.
• Characterization of output amplitude and force at various actuation frequencies.

Main Results:

• The piezoelectric fatigue testing device operates effectively at resonance.
• Achieved output amplitude up to 6.3 mm and output force ranging from 0.6-2.5 N at actuation frequencies above 100 Hz.
• The device exhibits superior performance including high resolution, quick response, small scale, low noise, and anti-electromagnetic interference.

Conclusions:

• The developed piezoelectric fatigue testing device is suitable for small-load fatigue analysis.
• The device's characteristics, including high testing frequency and precision, contribute to increased testing efficiency.
• This technology supports advancements in new material development and characterization.