Stake-and-Socket

(a) Fibrillar break in wet cotton, (b) Multiple split break of Kevlar, (c.d) Single split break of Kevlar. For further e.xplanation. see Fig. 1. 

Slake-and-sockci breaks, (a) From frequently autoclaved polyester overall, (b.c) Tensile break of human hair after 7(M) h of alternating UV radiation and humidification. From Weigmann and Ruetsch. TRI Princeton. For further e, planation. see Fig. I. 

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