SLOW CRACK GROWTH, CUMULATIVE DAMAGE, AND RUPTURE STATISTICS IN VISCOELASTIC BODIES.
Technical rept. Jan 66-Aug 66,
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH
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The Bueche-Halpin theory for the fracture of viscoelastic bodies is extended to predict the statistical variability of rupture data for both uniform and nonuniform excitation histories. The concept of cumulative damage is examined in light of some critical experimentation. It is shown that the geometry of the distribution is a sensitive functional of the excitation history and that the solution of this problem is the key step in the development of a general theory for fatigue. Author