Page 6 - Automotive Aerospace

Strength Testing and Fracture Observations for CFRP

— Imaging at Up to One Million Frames Per Second —
Tensile-Impact Strength Testing and Fracture Observations for CFRP

The development of composite materials requires not only static testing to verify
functionality but also testing to determine impact strength and crack
propagation.
As an example, we used a high-speed tensile impact tester together with a
high-speed video camera to observe the tensile impact fracture of CFRP samples.
Images were acquired by using the tester to output an imaging start signal
synchronized with the tensile load to externally trigger the camera. We also used
strobe lighting equipment to synchronize the illumination to the imaging timing.

The combination of an impact tester and high-speed video camera permits the
evaluation of material impact properties and the observation of fracture
properties simultaneously. This supports the development of a wide range of
materials from individual functional resins to composite materials.

Imaging trigger

HYPER VISION
High-speed video camera
High-speed video camera
Max. tensile speed
20 m/s

Strobe light source
Strobe light source
Images
Images
Test force data PC 1 million fps max.
Controller
HITS-T10 high-speed tensile tester
System Configuration

0 μs 4 μs 8 μs 12 μs

16 μs 20 μs 24 μs 28 μs
CFRP unidirectional (UD) material Sample: L20 × W6.25 × T0.3 mm
High-speed observations of fracture behavior Loading rate: 6 m/s (22 km/h)
250,000 fps

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