24th Congress of International Council of the Aeronautical Sciences, 29 August-3, September 2004, Yokohama, Japan
Paper ICAS 2004-5.3.3

A NEW APPROACH TO EVALUATE DURABILITY AND DAMAGE TOLERANCE FOR AIRCRAFT COMPOSITE STRUCTURES

H. Kikukawa, Y. Miyano, I. Kimpara
Kanazawa Institute of Technology, Japan

Keywords: time-temperature shift factor, post impact fatigue, under-threshold criteria, no-growth design

Three new approaches were made to evaluate the durability and damage tolerance of composite wing box and composite nose fuselage (cockpit) structures designed by nogrowth concept. Those approaches are (1) time / temperature shift factor based on accelerated coupon test data, (2) ‘post impact fatigue’ originated from ‘barely visible impact damage’ and (3) under-threshold criteria for flawed holes or matrix crack initiation.

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