HyperVision HPV-X3 - Applications

High-Speed Video Camera

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Material

DIC Analysis for High-Speed Tensile Testing of CFRPs

  • Both static and dynamic material properties, such as impact characteristics, are important for understanding the behavior of materials. Carbon fiber reinforced plastics (CFRPs) exhibit brittle fracture behavior with fracture progression that occurs instantaneously upon damage, and observing this phenomenon requires high-speed video cameras with excellent recording speeds and resolution. The improved resolution of the image sensor in the HPV-X3 improves camera performance for DIC analysis.

    DIC Analysis for High-Speed Tensile Testing of CFRPs

  • Recording speed: 20 Mfps, Test speed: 10 m/s, Specimen width: 12 mm

DIC Analysis in High-Speed Tensile Testing of Notched Polymer Specimens

  • Strain concentration was observed at the notch, and a decrease in strain was detected at the time of fracture.

    High-Speed Tensile Testing of Notched Polymer Specimens

  • Recording speed: 5 Mfps, Field of view width: approx. 25 mm

DIC Analysis of Impact Compression Test Using the Hopkinson Bar Method with HPV-X3

  • The impact compression test of an aluminum alloy using the Hopkinson bar method was recorded, and DIC analysis was conducted using the captured images.

    Hopkinson Bar Method
    DIC Analysis of Impact Compression Test Using the Hopkinson Bar Method with HPV-X3

  • Recording speed: 0.5 Mfps, Field of view width: approx. 15 mm

Impact Compression Test of an Acrylic Block Using the Hopkinson Bar Method

  • Using the Hopkinson bar method, an impact compressive load was applied to an acrylic block, and the propagation of cracks and the fracture behavior were captured.
    The acrylic block has a central circular hole with a diameter of 2 mm. It was observed that cracks propagate laterally from this hole, and additional diagonal cracks form, ultimately leading to fracture.

    Impact Compression Test of an Acrylic Block
    Hopkinson Bar Method

  • Recording speed: 5 Mfps, Field of view width: approx. 15 mm

3D-DIC Analysis in Compression Test of Glass Tube

  • Strain distribution in a glass tube under compression was visualized by 3D-DIC analysis using two HPV-X3 cameras. Observation of fracture behavior in brittle materials such as glass requires high-speed cameras with frame rates of several Mfps.

    3D-DIC

  • Recording speed: 5 Mfps, Field of view width: approx. 50 mm

  • 3D-DIC

Imaging courtesy of Graduate School of Engineering, Tohoku University, Center for Advanced Research of Materials Strength Science, Division of Next-Generation Energy Systems

Observing Crack Progression During Ring-on-Ring Testing of Glass

  • Ring-on-ring testing was performed on reinforced glass and images were captured of the cracks that occurred during failure. (Reference standard: ASTM C1499)
    Observing Blast and Shock Waves During Detonation of Micro-Explosives

Recording speed: 10 Mfps, Field of view width: approx. 45 mm  

High-Speed Imaging of Arc Behavior in Lightning Strike Tests

  • To mitigate lightning strike damage to aircraft materials, understanding the 
    damage mechanisms is crucial. Here, high-speed imaging was performed on an 
    aluminum thin wire during an arc entry test simulating a real lightning event, 
    allowing observation of the lightning current progression and the plasma formation and vaporization of the aluminum wire caused by the strike.

    arc behavior
    Arc Behavior in Lightning Strike Tests

  • Recording speed: 20 Mfps, Field of view width: approx. 50 mm
    Imaging courtesy of Strategic Planning Division, Japan Aerospace Exploration Agency (JAXA)

Observing Blast and Shock Waves During Detonation of Micro-Explosives

  • A silver azide pellet was detonated with a laser and the resulting blast and shock wave propagation was visualized in Schlieren images. The shock wave propagated around the blast wave and its reflection was visualized clearly in an aluminum alloy plate.
    Observing Blast and Shock Waves During Detonation of Micro-Explosives

Recording speed: 1 Mfps, Field of view width: approx. 250 mm 

  • Images of the area around a silver azide pellet during detonation were captured at 20 Mfps. The images captured a blast wave that appeared approx. 450 ns after laser irradiation of the pellet, which was followed by the progression of a shock wave around the blast wave.

Recording speed: 20 Mfps, Field of view width: approx. 5 mm  

Images captured by: Specially Appointed Associate Professor Kiyonobu Otani, Institute of Fluid Science, Tohoku University

Observing Shock Waves Using the Schlieren Method

  • Shock waves generated by a pellet launched from a gas gun were captured using the Schlieren method.
    Two rubber bands placed along the pellet trajectory allowed the reflection of the shock waves to be observed.

    Schlieren Method

  • Recording speed: 0.87 Mfps, Field of view width: approx. 100 mm

Life Science

  • Expansion and Contraction of Bubbles in Polyvinyl Alcohol (PVA) Gel

    Images were captured of bubbles being formed while PVA gel was irradiated with a laser. Bubbles were observed to repeatedly expand and contract inside the gel. Images captured by the camera show the progression of shock waves produced when the bubbles were formed and collapsed.
  • Expansion and Contraction of Bubbles in Polyvinyl Alcohol (PVA) Gel

 

  • Bubble Formation

    Recording speed: 20 Mfps, Field of view width: approx. 75 mm  

  • Bubble Collapse

    Recording speed: 20 Mfps, Field of view width: approx. 20 mm  


Images captured by: Associate Professor Tokitada Hashimoto, Department of Mechanical Engineering, Faculty of Science and Engineering, Saga University

 

Observation of Shock Waves in Shock Tubes

  • The shock wave generated when releasing air at eight times atmospheric pressure was captured using a Mach-Zehnder interferometer. The shock tube consists of a driver section, a driven section, a supersonic nozzle, and a needle. A plastic diaphragm is placed between the driver and driven sections, and during the test, the diaphragm is ruptured using the needle to generate the shock wave.

    Observation of Shock Waves in Shock Tubes

  • Recording speed: 1 Mfps
    Images captured by: Associate Professor Tokitada Hashimoto, Department of Mechanical Engineering, Faculty of Science and Engineering, Saga University

 

Observing the High-Frequency Oscillation of Microbubbles

  • Images were captured of microbubbles that formed in water when the water was irradiated and heated locally with a laser. The microbubbles first expanded then contracted and the images show a jet flow that occurs during contraction as the bubble disappears.

    Observing Blast and Shock Waves During Detonation of Micro-Explosives

  • Recording speed: 20 Mfps, Field of view width: approx. 110 um  
    Images captured by: Associate Professor Kyoko Namura, Department of
    Micro Engineering, Graduate School of Engineering, Kyoto University