Damage-Tolerance Practices Applied to Transport Aircraft Structures

Modern jet transport aircraft structures, although certified in accordance with current regulations, have been designed using damage-tolerance practices which resulted in an excellent safety record. In spite of these practices unpredictable cracks and corrosion occur in service. The new regulations recognize these developments and place special emphasis on certification of damage-tolerant structures.

Present damage-tolerance methods and procedures are discussed. Analytical methods are described which account for the upgrading of the new regulations.