Effect of positive and negative stress ratio on a small time scale fatigue crack growth formulation

Karthik Rajan Venkatesan, Yongming Liu

Research output: Contribution to conferencePaper

Abstract

A previously developed small time scale fatigue crack growth model is improved and modified to predict fatigue crack growth (FCG) under positive and negative stress ratio. One of the significant phenomena of the crack opening stress under negative stress ratio is the residual tensile stress induced by the applied compressive load. A modified coefficient is introduced to determine the extent to which residual tensile stress impact the crack closure. A modified virtual crack-annealing model for crack closure is proposed and is shown to have satisfactory accuracy under both positive and negative stress ratio for a wide range of materials.

Original languageEnglish (US)
Pages546-547
Number of pages2
StatePublished - Jan 1 2017
Event14th International Conference on Fracture, ICF 2017 - Rhodes, Greece
Duration: Jun 18 2017Jun 20 2017

Conference

Conference14th International Conference on Fracture, ICF 2017
CountryGreece
CityRhodes
Period6/18/176/20/17

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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  • Cite this

    Venkatesan, K. R., & Liu, Y. (2017). Effect of positive and negative stress ratio on a small time scale fatigue crack growth formulation. 546-547. Paper presented at 14th International Conference on Fracture, ICF 2017, Rhodes, Greece.