Accession Number : ADP001614

Title :   'Short Crack' Fatigue Design Considerations: Modelling, Characterization, Interpretation, Detection: Prediction of Behavior,


Personal Author(s) : Hoeppner,D. W.

Report Date : APR 1983

Pagination or Media Count : 14

Abstract : This meeting has brought together a number of diverse interests, each with a different perspective on what a short crack is. The literature relevant to the short crack effect suggests that a short crack is any crack whose growth can't be correlated with handbook growth rate data using fracture mechanics technology, specifically linear elastic fracture mechanics (LEFM). The short crack effect is of interest to alloy designers because it may be a key to improving materials in the future. It is of interest to the scientist because if does not follow the commonly used analysis framework of LEFM. But most importantly for AGARD, it is of concern to the engineer in that the short crack literature indicates LEFM predictions of growth rate (when integrated crack size), inspection interval, and possibly critical crack size are often nonconservative in the presence of this effect.

Descriptors :   *Airframes, *Cracking(Fracturing), *Structural mechanics, Crack propagation, Sizes(Dimensions), Linearity, Elastic properties, Growth(General), Mathematical prediction, Loads(Forces), Structural response

Distribution Statement : APPROVED FOR PUBLIC RELEASE