Retardation of fatigue crack growth in high strength steel S690 using a modified stop-hole technique

Seyed Mohammad Javad Razavi, Majid Reza Ayatollahi, Christof Sommitsch, Christian Moser

Research output: Contribution to journalArticlepeer-review

Abstract

The purpose of this paper is to study the effects of a new stop-hole technique on the subsequent
delay in fatigue crack propagation. Single edge notch tension specimens of S690
steel alloy are used to perform the fatigue crack initiation/growth tests under cyclic stress
loading. A parametric study is conducted on different geometrical parameters of double
stop-hole. The experimental procedure is simulated using finite element analysis and fatigue
life models. The experiments including fatigue crack initiation/growth measurements
and microscopic examinations beside the numerical results show that the fatigue life
extension caused by the double stop-hole method is significantly more than that of the
conventional single stop-hole method. The lower stress level around the double stophole
plays an important role in increasing the fatigue initiation life from the stop-hole
edge.
Original languageEnglish
Pages (from-to)226 - 237
JournalEngineering fracture mechanics
Volume169
Issue number0013-7944
Publication statusPublished - 23 Nov 2016

ASJC Scopus subject areas

  • Materials Science(all)

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