Numerical and analytical investigation of the size-dependency of the FPZ length in concrete
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The main objective of this paper is to study the size effect on the fracture characteristics in concrete structures. The numerical investigation is based on a mesoscale modeling approach. Analytically, two size effect laws are investigated: the classical Bažant SEL and a new size effect law based on the enrichment of the stress field on the crack tip. The mesoscopic approach is used to study the evolution of the tangential stress along the crack path in order to investigate the fracture process zone variation during the cracking process. In addition, different analytical governing equations are used to evaluate the size-dependency of the FPZ length.
KeywordsSize effect Fracture FPZ length Mesoscopic modeling
The authors thank Dr Syed Yasir Alam and Pr Ahmed Loukili from the GEM laboratory (Ecole Centrale de Nantes, France) for providing experimental results.
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