FATIGUE STRENGTH OF DRILLED HOLES UNDER MEMBRANE AND PLATE-BENDING STRESSES

Abstract

Fatigue tests of stripped plates with a circular hole are carried out under tension and bending. The condition of the prevention of the cracking at circular holes subjected to combined membrane and plate-bending stresses is investigated. An equation for estimation of the maximum stress at the edge of drilled holes is established. This equation contains the membrane and plate-bending stresses which are calculated by the finite element analysis with plate elements. An application of the drilled holes is shown for the fatigue cracks propagating in the girder webs where cross beams are connected.