In situ 3D characterization of fatigue cracks displacement fields

Joel Lachambre, Jean-Yves Buffiere, Julien Réthoré, Arnaud Weck


The three dimensional growth of fatigue cracks in samples of nodular graphite cast iron is
characterized using laboratory X-ray computed tomography. The cracks grow from laser machined artificial
defects, their development is monitored in situ using laboratory X-ray computed tomography (lab. CT) and
Digital Volume Correlation (DVC). The combination of both techniques gives access to the 3D displacement
field at the tip of the crack (mainly mode I opening).

Full Text: