Accession Number : ADP000009

Title :   Fatigue and Fracture Evaluation of the A-7E Arresting Gear Drag Link,

Corporate Author : VOUGHT CORP DALLAS TX

Personal Author(s) : Merkord,D. L. ; Dumesnil,C. E. ; Gray,T. D.

Report Date : SEP 1982

Pagination or Media Count : 18

Abstract : The primary objective of this program was to establish a proof load criteria for the A-7E drag link that is comparable to that of the hook shank. Twenty-three drag links were tested under realistic load and environment (3.5% salt solution) conditions. Critical locations, fatigue lives, residual strength and crack growth rates were determined and a proof load criteria was developed and verified. Even though a proof load criteria comparable to that of the hook shank could not be obtained, this technique used the crack growth data and nondestructive inspection (NDI) capabilities. An interval identical to that of the hook shank was found which gave a high probability of flaw detection. Vought recommended this second option as the most economic and efficient method of inspection. This paper describes the results of a test and evaluation program conducted for the Naval Air Systems Command. (Author)

Descriptors :   *Arresting gear, *Steel, *Fatigue(Mechanics), *Fracture(Mechanics), *Test and evaluation, Fatigue life, Residual stress, Crack propagation, Nondestructive testing, Defects(Materials), Strength(Mechanics), Factor analysis

Subject Categories : Terminal Flight Facilities
      Metallurgy and Metallography
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE