Characterization of Giant Magnetostrictive Materials Using Three Complex Material Parameters by Particle Swarm...

Area of Science:

• Materials Science
• Mechanical Engineering
• Electrical Engineering

Background:

• Giant magnetostrictive materials (GMMs) are essential for high-power transducers.
• GMM performance is highly sensitive to pre-stress conditions.
• Accurate characterization of complex material parameters is vital for transducer design and analysis.

Purpose of the Study:

• To propose an optimized characterization method for GMMs using three complex material parameters.
• To improve a lumped parameter model for longitudinal transducers by incorporating material losses.
• To enhance the credibility and stability of GMM parameter characterization.

Main Methods:

• An improved lumped parameter model was developed for longitudinal transducers.
• Material losses were incorporated into the model.
• Structural and contact damping were experimentally measured and applied.
• Real parts of parameters were extracted from impedance data; imaginary parts from phase data.
• Global sensitivity analysis was performed to validate the method.

Main Results:

• The proposed method accurately characterizes three complex material parameters for GMMs.
• Sensitivity analysis confirmed high parameter credibility and model performance compared to classical methods.
• Experimental validation demonstrated the stability and reliability of the characterization technique.

Conclusions:

• The optimized characterization method provides credible complex material parameters for GMMs.
• This method is essential for accurate high-power transducer design and performance analysis.
• The findings contribute to advancing the application of GMMs in engineering.