Strain capacity assessment of API X65 steel using damage mechanics

Testa G., Bonora N., Gentile D., Ruggiero A., Iannitti G., Carlucci A., ...More

FRATTURA ED INTEGRITA STRUTTURALE, vol.11, no.42, pp.315-327, 2017 (ESCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 42
  • Publication Date: 2017
  • Doi Number: 10.3221/igf-esis.42.33
  • Journal Name: FRATTURA ED INTEGRITA STRUTTURALE
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus
  • Page Numbers: pp.315-327
  • Keywords: Damage mechanics, Fracture toughness, Strain capacity, Strain-based design, DUCTILE CRACK-GROWTH, MODEL, FAILURE, MICROMECHANICS, RESISTANCE, PIPES
  • Ankara Haci Bayram Veli University Affiliated: No

Abstract

Strain-based design for offshore pipeline requires a considerable experimental work aimed to determine the material fracture toughness and the effective strain capacity of pipe and welds. Continuum damage mechanics can be used to limit the experimental effort and to perform most of the assessment analysis and evaluation in a simulation environment. In this work, the possibility to predict accurately fracture resistance of X65 steel using a CDM model proposed by the authors, is shown. The procedure for material and damage model parameters identification is presented. Damage model predictive capability was demonstrated predicting ductile crack growth in SENB and SENT fracture specimens.