The BM3 instrumentation facility is equipped with two Photron FASTCAM SA1 high speed cameras capable of digitally capturing 5,400 full frames per second (fps) at one mega pixel (1K x 1K) resolution and up 675,000 fps at lower resolution (see performance table below). Each camera is equipped with an assortment of high quality Nikon lenses to accommodate different zoom and magnification requirements. The FASTCAM SA1 high speed system is robust but portable and it can be set up in a wide variety of locations. The Aramis high speed system offers the same non-contact strain analysis capabilities as the Aramis 3D.
|Resolution, pixels||Frame rate, fps|
|1,024 x 1,024||5,400|
|832 x 608||10,800|
|640 x 480||18,000|
|512 x 512||20,000|
|256 x 256||67,500|
|256 x 16||500,000|
|64 x 16||675,000|
Engineered surface wetting test
Water dropped onto an engineered surface.
Polycarbonate tube subjected to shock loading
This is a polycarbonate tube subjected to a shock wave. The vertical strain is visualized on the video along the plot of vertical strain vs time on the right. The data obtained in this type of experiments can be used to validate finite element simulations.
Shocktube window deflection
This experiment measured the deflection of an observation window located on the side of a shocktube. Tests on glass and polycarbonate windows with over pressures of 20 psi were conducted to determine the magnitued of flexing. Deflections were determined to be on the order of 1mm out of plne and deemed to be small for both, polycarbonate and glass.
The goal of this experiment was to measure the crack opening at two different locations on an asphalt sample. CTOD is where the crack propagates from and CMOD is the bottom of the notch in the asphalt. Tests at different rates were conducted to measure CTODs and CMODs. The strain is also measured so that it can be compared to finite element simulations. The fracture process zone (high strain region around the crack tip) can be seen moving up the sample as the crack propagates.
High speed video of polydimethylsiloxane (PDMS) dynamic fracture/tearing. The sample was stretched to approximately 75% strain and then a crack was induced on the right side. The strain vs time data was plotted and shown along the high speed video.