Drop-weight camera system for high-strain-rate mechanical testing

G. M. Swallowe; S. Hamdan; X. Zeng; W. P. Schiffers

doi:10.1117/12.273480

28 May 1997 Drop-weight camera system for high-strain-rate mechanical testing

G. M. Swallowe, S. Hamdan, X. Zeng, W. P. Schiffers

Proceedings Volume 2869, 22nd International Congress on High-Speed Photography and Photonics; (1997) https://doi.org/10.1117/12.273480
Event: 22nd International Congress on High-Speed Photography and Photonics, 1996, Santa Fe, NM, United States

Abstract

This paper describes a Dropweight-High Speed Camera system designed to measure the uniaxial compressive stress-strain properties of polymers at the strain rates appropriate to ballistic and impact events over time scales of one to tens of milliseconds. The instrument compliments existing techniques and represents a novel development of existing equipment types. It operates at strain rates in the range of 10² to 10³ and over a temperature range of 20 - 200 degree(s)C. Stress is calculated directly from a measured force obtained from a calibrated accelerometer and strain is calculated from the sample displacement measured directly using the high speed camera. The camera system has the capability of providing direct visualization simultaneously with stress information of the processes occurring during the deformation and fracture of materials and provides the ability to measure dynamic Poisson's ratios.

Citation Download Citation

G. M. Swallowe, S. Hamdan, X. Zeng, and W. P. Schiffers "Drop-weight camera system for high-strain-rate mechanical testing", Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); https://doi.org/10.1117/12.273480

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KEYWORDS

Cameras

Calibration

Imaging systems

Glasses

Photography

Polymers

Temperature metrology

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