The attache Fig. shows a square-shaped test sample with 16-layer glass epoxy with dimensions of 300 × 300 mm and a thickness of 1.4 mm. The thickness of each layer was approximately 0.0875 mm. The delamination in the lateral dimensions with different size was simulated by inserting copper sheets of a thickness of 0.02 mm. The locations of the delamination were between the 2nd and 3rd layer, the 4th and 5th layer, the 8th and 9th layer, and the 14th and 15th layer with delamination depths of 1.23 mm, 1.23 mm, 0.7 mm, and 0.18 mm, respectively, starting from the rear side of the sample.
So, could somebody has idea about using copper sheets to simulate delaminations in composite materials?
Copper may have the closest mechanical properties (i.e. toughness, ductility, strength, etc) with composite materials...
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