Experimental techniques for ductile damage characterisation

A. Sancho, M.J. Cox, T. Cartwright, G.D. Aldrich-Smith, P.A. Hooper, C.M. Davies, J.P. Dear

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Ductile damage in metallic materials is caused by the nucleation, growth and coalesce of voids and micro-cracks in the metal matrix when it is subjected to plastic strain. A considerable number of models have been proposed to represent ductile failure focusing on the ultimate failure conditions; however, only some of them study in detail the whole damage accumulation process. The aim of this work is to review experimental techniques developed by various authors to measure the accumulation of ductile damage under tensile loads. The measurement methods reviewed include: stiffness degradation, indentation, microstructure analysis, ultrasonic waves propagation, X-ray tomography and electrical potential drop. Stiffness degradation and indentation techniques have been tested on stainless steel 304L hourglass-shaped samples. A special interest is placed in the Continuum Damage Mechanics approach (CDM) as its equations incorporate macroscopic parameters that can represent directly the damage accumulation measured in the experiments. The other main objective lies in identifying the strengths and weaknesses of each technique for the assessment of materials subjected to different strain-rate and temperature conditions.
LanguageEnglish
Pages966-973
Number of pages8
JournalProcedia Structural Integrity
Volume2
DOIs
Publication statusPublished - 21 Jul 2016
Event21st European Conference on Fracture - Catania, Italy
Duration: 20 Jun 201624 Jun 2016

Fingerprint

Indentation
Stiffness
Ultrasonic propagation
Continuum damage mechanics
Degradation
Tomography
Strain rate
Loads (forces)
Plastic deformation
Nucleation
Stainless steel
Cracks
X rays
Microstructure
Metals
Experiments
Temperature

Keywords

  • ductile damage
  • voids
  • continuum damage mechanics
  • elastic modulus
  • indentation
  • ultrasonic waves
  • X-ray tomography
  • electrical potential drop
  • digital image correlation

Cite this

Sancho, A., Cox, M. J., Cartwright, T., Aldrich-Smith, G. D., Hooper, P. A., Davies, C. M., & Dear, J. P. (2016). Experimental techniques for ductile damage characterisation. Procedia Structural Integrity, 2, 966-973. https://doi.org/10.1016/j.prostr.2016.06.124
Sancho, A. ; Cox, M.J. ; Cartwright, T. ; Aldrich-Smith, G.D. ; Hooper, P.A. ; Davies, C.M. ; Dear, J.P. / Experimental techniques for ductile damage characterisation. In: Procedia Structural Integrity. 2016 ; Vol. 2. pp. 966-973.
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Sancho, A, Cox, MJ, Cartwright, T, Aldrich-Smith, GD, Hooper, PA, Davies, CM & Dear, JP 2016, 'Experimental techniques for ductile damage characterisation' Procedia Structural Integrity, vol. 2, pp. 966-973. https://doi.org/10.1016/j.prostr.2016.06.124

Experimental techniques for ductile damage characterisation. / Sancho, A.; Cox, M.J.; Cartwright, T.; Aldrich-Smith, G.D.; Hooper, P.A.; Davies, C.M.; Dear, J.P.

In: Procedia Structural Integrity, Vol. 2, 21.07.2016, p. 966-973.

Research output: Contribution to journalArticle

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AU - Sancho, A.

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AU - Cartwright, T.

AU - Aldrich-Smith, G.D.

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AU - Davies, C.M.

AU - Dear, J.P.

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Sancho A, Cox MJ, Cartwright T, Aldrich-Smith GD, Hooper PA, Davies CM et al. Experimental techniques for ductile damage characterisation. Procedia Structural Integrity. 2016 Jul 21;2:966-973. https://doi.org/10.1016/j.prostr.2016.06.124