Assertion: stress concentration | /r/CreatedBy | the use of punched rivet holes
Facets:
value: around the automatic direction finder cutouts
type: OTHER
Source sentences:
text: The de Havilland Comet aircraft experienced a number of catastrophic failures that were eventually found to be due to fatigue cracks growing from the high stress concentration caused by the use of punched rivet holes around the automatic direction finder cutouts (sometimes referred to as windows).