Crazing

Crazing is a fine network of linear features which frequently precedes fracture in glassy thermoplastic polymers. Crazing occurs in regions of high hydrostatic tension, or in regions of very localized yielding, which leads to the formation of interpenetrating microvoids and small fibrils. If an applied tensile load is sufficient, these bridges elongate and break, causing the microvoids to grow and coalesce; as microvoids coalesce, cracks begin to form.

This article is about crazing in polymers. For crazing in ceramic glazes, see Glaze defects ยง Crazing.
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