Study on the dynamic failure performance of bamboo fiber/high-density polyethylene composites with different fiber content using digital image correlation.

8 a1–c1, before the initiation of crack propagation ( t − ti < 0 ) and after the initiation of crack propagation ( t − ti > 0 ), all samples display an increasing trend in the Mode-I SIF.

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A clear trend emerges—as BF content increases, the crack propagation rate also increases (BPE8 > BPE5 > BPE2 > BPE0).

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At 10-J impact energy, BPE samples with BF show a decreasing trend in crack propagation process as BF content increases, with BPE8 having the shortest crack propagation process at 16.6 mm.

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