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I don't think saw dust is considered fibrous even if a tree is fibrous... I would think that to be considered fibrous, it would have to be longer in one dimensi

• elcritch 5y ago
  Saw dust isn't an ideal fibrous material, but it's still primarily composed of fibers [see 1]. Really they're a bundle of fibers. On a macro scale it makes less sense, but on a micro-scale the fibers are much longer than the micro-cracks that begin to form in materials under strain and which lead to the loss of strength or fracture we normally think about. 1: https://www.sciencedirect.com/science/article/pii/B9780128142400000021 https://www.sciencedirect.com/science/article/pii/B978012814...