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Pulse-Heated Kolsky Bar
This facility provides dynamic strength measurements in tension and compression at strain rates between 500 strain/s and 5000 strain/s with the option for rapid (≈ 1 s) heating of metal samples up to 1200 °C. This instrument provides mechanical data necessary to develop physics-based models of dynamic manufacturing processes such as machining and friction stir welding/deposition as well as impact and/or crash events.
Specifications/Capabilities
- Compressive and direct tensile Kolsky Bars (Split Hopkinson Pressure Bars) with electrical pulse-heating up to 1200 °C with controlled thermal profiles and maximum heating rates above 1000 °C/s
- 5 MHz data acquisition systems with 8 differential channels with 24 bits per channel
- Infrared spot pyrometers with millisecond response
- Mid-wave infrared thermal camera with a maximum capture rate of 870 Hz
- Three-dimensional digital image correlation system with maximum deformation (strain) measurement rate of 180 kHz (128 by 128 pixel resolution)
- Finite Element Analysis (FEA) of the complete measurement system, including coupled electric-thermal-mechanical simulations, is available for uncertainty characterization and property identification via Materials Testing 2.0 methods