Influence of specimen geometry on determination of double-K fracture parameters of concrete: a comparative study

• Published in: International journal of fracture Vol. 149; no. 1; pp. 47 - 66
• Main Authors: Kumar, Shailendra, Barai, S. V.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2008; Springer; Springer Nature B.V
• Subjects: Applied sciences; Automotive Engineering; Building structure; Buildings. Public works; Characterization and Evaluation of Materials; Chemistry and Materials Science; Civil Engineering; Classical Mechanics; Compact tension; Comparative studies; Concrete structure; Construction (buildings and works); Exact sciences and technology; Fracture mechanics (crack, fatigue, damage...); Fundamental areas of phenomenology (including applications); Materials Science; Mechanical Engineering; Original Paper; Parameters; Physics; Solid mechanics; Specimen geometry; Structural and continuum mechanics; Tension tests; Weighting functions; Compact tension test; Cohesive stress; Weight function; Concrete fracture; Mode-I fracture; Double-K fracture parameters; Three-point bend test; Notched test piece; Weight function, Cohesive stress; Rupture; Test bar; Modeling; Weight; Three-point bend test, Compact tension test,Concrete fracture,Mode-I fracture; Size effect; Bending test; Crack
• ISSN: 0376-9429; 1573-2673
• DOI: 10.1007/s10704-008-9227-1

Comparative study on analytical method , simplified method and weight function approach for determination the double- K fracture parameters using three-point bend and compact tension tests specimen geometries is presented in the paper. The input data required for numerical calculations are obtained using Fictitious Crack Model. The study reports that the double-K fracture parameters computed depends on factors such as initial-notch length/depth ratios, specimen geometry and size-effect. In addition, it is demonstrated that the use of weight function will further improve the computational efficiency without loss of accuracy.