Numerical and Experimental Investigation of Mode I Cracking of Asphalt Concrete using Semi-Circular Bending Test

Mode I fracture toughness (KIc) assessment procedure is presented in this study for semi-circular bend configuration. The geometrical factor f(a/w) is determined through 2D and 3D FEM simulations assuming linear elastic behavior. Parametric analyses have been done to evaluate the sensitivity of f(a/w) to the Poisson’s ratio (ν), specimen thickness (t) and position of the Gauss points where the vertical displacements are computed. The FEM analysis shows that f(a/w) is more sensitive to ν in plane strain condition (thick specimens) than plane stress condition (thin specimen). Moreover, f(a/w) decreases slightly when “t” increases from 15 to 75 mm. In addition, f(a/w) evaluated from 3D FEM is slightly higher than that obtained in 2D configuration. The results also show that f(a/w) decreases when the position of the Gauss point is chosen far from the crack tip. Full factorial experimental program has been designed to evaluate the potential influence of: reclaimed asphalt (RA) content, loading rate and temperature on the fracture toughness (KIc) and the total fracture energy (Wf). The results show that the influent parameters on the KIc can be ranked from the most important to the least one as follows: loading rate, temperature and RA content. They also show that temperature is the most influent parameter on Wf, while the loading rate is the least influent one. KIc and Wf results have been modeled by polynomial functions.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2018.02.161
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0950061818304100
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • Abstract reprinted with permission of Elsevier.
• Authors:
  • Somé, Saannibe Ciryle
  • Feeser, Arnaud
  • Pavoine, Alexandre
• Publication Date: 2018-4-30

Language

• English

Media Info

• Media Type: Web
• Features: Figures; Photos; References; Tables;
• Pagination: pp 34-46
• Serial:
  • Construction and Building Materials
  • Volume: 169
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Asphalt concrete; Bend tests; Finite element method; Fracture properties
• Uncontrolled Terms: Semi circular bend test
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01670917
• Record Type: Publication
• Files: TRIS
• Created Date: May 29 2018 4:04PM