Stress Analyses of B-52 Pylon Hooks

Ko, William L. and Schuster, Lawrence S. (1985) Stress Analyses of B-52 Pylon Hooks. Technical Report NASA TM-84924, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

The NASTRAN finite element computer program was used in the two-dimensional stress analysis of B-52 carrier aircraft pylon hooks: (1) old rear hook (which failed), (2) new rear hook (improved geometry), (3) new DAST rear hook (derated geometry), and (4) front hook. NASTRAN model meshes were generated by the aid of PATRAN-G computer program. Brittle limit loads for all the four hooks were established. The critical stress level calculated from NASTRAN agrees reasonably well with the values predicted from the fracture mechanics for the failed old rear hook.

EPrint Type:	NASA Technical Memorandum
Keywords:	B-52 pylon hooks, Fracture mechanics, NASTRAN stress analysis, PATRAN mesh generations, Stress concentrations
Subjects:	Aircraft/Project: B-52 (31 - 39) Engineering: (39) Structural Mechanics
ID Code:	549
Deposited On:	30 January 2006
Additional Information:	33 pages.