Interpretation of tensile softening in concrete, using fractal geometry

Khezrzadeh, H ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2008
  3. Abstract:
  4. Concrete is a heterogeneous material with a wide variety of usage in structural design. Concrete under tension exhibits strain softening, i.e., a negative slope in the stress-deformation diagrams. Different softening curves have been proposed in the literature to interpret this phenomenon. In current research, a new softening curve for concrete has been proposed by using the newly introduced concept of fractal geometry. This new softening curve is denominated a 'Quasi-fractal' softening curve and consists of two parts, a linear portion at the beginning and an exponential portion in the rest of the curve. A comparison of a "Quasi-fractal" softening curve with a set of proposed experimental softening curves has been performed, which reveals good agreement. © Sharif University of Technology, February 2008
  5. Keywords:
  6. Fractal geometry ; Strain softening ; Tensile softening ; Computational geometry ; Concretes ; Curve fitting ; Deformation ; Fractals ; Strain ; Stresses ; Tensile properties ; Concrete ; Fracture geometry ; Softening ; Stress ; Tension ; Time dependent behavior
  7. Source: Scientia Iranica ; Volume 15, Issue 1 , 2008 , Pages 8-15 ; 10263098 (ISSN)
  8. URL: http://scientiairanica.sharif.edu/article_2974.html