EFFECTS OF STRESS RISING TIME AND STRESS HOLD TIME IN A LOADING CYCLE ON CORROSION FATIGUE CRACK GROWTH BEHAVIOUR IN A LOW FREQUENCY RANGE.

Toshimitsu Yokobori, Takeo Yokobori, Tomokazu Kosumi, Nobuo Takasu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In order to clarify whether da/dN depends on cycle only, or on time only or on both cycle and time, crack growth behavior, in a 3. 5% NaCl solution, of low alloy Cr-Mo steel at a lower frequency range was experimentally studied, stress frequency f being controlled by stress rise time t//R and stress hold time t//H independently. From the results and the analysis, a new experimental formula was obtained for da/dN in nonlinear terms of f, t//r and t//H. A stochastic process concept is proposed for the significance of the equation of this type. As a special case, a simple and convenient expression for da/dN and da/dt in corrosion fatigue (t//H equals 0 s) was proposed in terms of frequency.

Original languageEnglish
Pages (from-to)1541-1549
Number of pages9
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume53
Issue number492
Publication statusPublished - 1987 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering

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