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Visualization of High Speed Liquid Jet Impaction on a Moving Surface

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High-speed impact test using an inertial mass and an optical interferometer.

T Jin¹, K Watanabe, I A Prayogi

¹School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan. k.billow@gmail.com

The Review of Scientific Instruments

|August 2, 2013

Summary

This summary is machine-generated.

A novel high-speed impact testing method accurately measures material properties using an inertial mass and dual beat-frequencies laser Doppler interferometer (DB-LDI). This technique enables precise evaluation of mechanical behavior under dynamic loading conditions.

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Area of Science:

Materials Science
Mechanical Engineering
Experimental Physics

Background:

Accurate evaluation of material mechanical properties under high-speed impact is crucial for engineering applications.
Existing methods may lack precision or the capability to test under extreme dynamic loading.
High-velocity impact testing requires sophisticated measurement techniques for reliable data acquisition.

Purpose of the Study:

To introduce a new high-speed impact testing method for material characterization.
To demonstrate the capability of the proposed method in accurately measuring impact parameters.
To evaluate the mechanical properties of viscoelastic materials under high-speed impact loading.

Main Methods:

Utilizing an inertial mass levitated by an aerostatic linear bearing for controlled high-velocity collisions.
Employing a dual beat-frequencies laser Doppler interferometer (DB-LDI) for precise velocity measurement of the inertial mass.
Calculating position, acceleration, and impact force from the high-precision velocity data.

Main Results:

The DB-LDI accurately measured the velocity of the inertial mass, exceeding critical velocities.
Position, acceleration, and impact force were reliably derived from the measured velocity data.
The method successfully evaluated the mechanical properties of a viscoelastic material under high-speed impact.

Conclusions:

The proposed high-speed impact testing method provides accurate and reliable data for material characterization.
The DB-LDI is effective for measuring high velocities critical for dynamic impact analysis.
This technique offers a valuable tool for understanding material behavior under extreme loading conditions.