EntityQ20820497· pop 11· linked from 19 articlesnotchSign in to savedeliberately introduced defect in a planar material whereby stress is concentratedWikidata factsInstance oftechniqueSubclass ofabsenceShow 1 more factP1552shapevia Wikidata · CC0Connectionscharpy impact testEntitydigital object identifierEntityCategoriesCommons link is locally definedFracture mechanics