Time-Resolved Imaging Reveals Bubble Entrapment Process
Specialised Imaging reports on how the Institute for Carbon
Composites, Technical University of Munich, Germany is using a Kirana
Ultra High-Speed camera to record high-resolution images of a
unidirectional Carbon-Epoxy composite material undergoing a dynamic
tension test on a split-Hopkinson Tension Bar.
The experimental
setup was to determine the mechanical properties of Carbon Epoxy
composites under high strain rates (100 - 1000 1/s). The deformation and
the failure patterns of these composite materials was observed and
recorded in tests that lasted less than 200 micro seconds.
Using
the Kirana camera has provided the LCC with the ability to capture
high-resolution images of the ultra high-speed events that often occur
when undertaking dynamic tension tests. Taking up to 5,000,000 frames
per second, and shuttering every 100 nanoseconds, there is no compromise
in capturing high-quality data. The data is exported in 180 frames so
each test can be easily saved and viewed.
Using the images
captured by the Kirana ultra high-speed camera, the LCC researchers
imported them into state-of-the-art Digital Image Correlation (DIC)
software** enabling the calculation of the in-plane strain-field. In
addition, the images revealed useful information regarding the
deformation and failure mechanisms of the specimens.
Founded in
May 2009, the Institute for Carbon Composites (LCC) undertakes
fundamental research and application-oriented industry cooperation in
the field of fiber-reinforced composites. Experimental methods are of
great importance for the investigation of material behaviour and the
further development of fiber-reinforced polymer matrix composites. At
the LCC a broad spectrum of state-of-the-art test methods and equipment
is available for the determination of the physical and mechanical
properties of matrix systems and laminates. In addition to the
application of various standards, the LCC also investigates and develops
new and innovative testing techniques. For further information visit www.lcc.mw.tum.de/en/home.
For further information on the Kirana ultra high-speed camera please visit www.specialised-imaging.com or contact Specialised Imaging on +44-1442-827728 / +49-8141-666-8950 / +1-951-296-6406 or info@specialised-imaging.com.
Specialised
Imaging is a knowledgable, dynamic company focused on design,
manufacture, service and supply of ultra high-speed imaging systems and
components for industrial, defence and scientific applications. The
company's continuing policy is to invest in the development of
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advances and use improved components wherever possible. A total
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held as the keys to the future.
**DIC software used - GOM Aramis (see www.gom.com)