Paper, The Structure and Properties of Spider Silk
Silks from the spider’s orb-web are amongst the very best structural materials produced by nature: spiders can produce a large aerial filter from a minimal amount of material. By studying how the structure and properties of silks are matched to their mechanical function, we can increase our general understanding of structure-property relationships in fibrous polymers.
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The wood skeletons of cholla cacti, subject to spartan desert conditions and hurricane force winds, provide a new template for torsionally resilient biological materials. Selective lignification and macroscopic tubercle pore geometry contribute to density-efficient shear stiffness, while mesoscopic wood fiber straightening, delamination, pore collapse, and fiber pullout provide extrinsic toughening mechanisms. […]
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