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An aircraft wing made from an aluminium alloy has a plane-strain fracture toughness of 30 MPa√m. Fracture results when the wing is subjected to a stress of 126 MPa as a result of an internal crack that resulted from a faulty fabrication procedure. What is the internal (2*a) crack length? Assume Y = 1. Supply 3 significant figures in your answer. /
'n Vliegtuigvlerk wat van 'n aluminium allooi gemaak is, het 'n vlak-rekbreuk-taaiheid van 30 MPa√m. Breuk ontstaan wanneer die vlerk aan 'n spanning van 126 MPa onderwerp word as gevolg van 'n interne kraak wat voortgespruit het uit 'n foutiewe vervaardigingsprosedure. Wat is die interne (2*a) kraaklengte? Aanvaar Y = 1. Gee 3 betekenisvolle syfers in u antwoord.
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