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Mesoscopic investigation of size effect in notched concrete beams: The role of fracture process zone

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journal contribution
posted on 19.07.2019, 12:42 by Rongxin Zhou, Han-Mei Chen
A comprehensive mesoscopic investigation has been conducted into the classic topic of size effect, using notched plain concrete beams subjected to three-point bending as a test bed. The concrete beams are modelled as random heterogeneous material containing three components, coarse aggregates, mortar and the interface transition zone. Mesoscopic numerical simulations using a 2D mesoscale continuum damage-based model, enhanced by a nonlocal treatment, is used to capture the whole fracture process in concrete materials. Both global and local numerical results are then examined and verified with relevant experimental evidence from the literature. A stress field interaction theory based on the strip yield model is proposed to interpret the size effect phenomenon and the role of detailed fracture process zone features is discussed accordingly

Funding

The research reported in the paper is partly funded by the Chinese Scholarship Council and the University of Edinburgh through a joint scholarship for the PhD study of the first author.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Engineering Fracture Mechanics

Volume

212

Pages

136 - 152

Citation

ZHOU, R. and CHEN, H-M., 2019. Mesoscopic investigation of size effect in notched concrete beams: The role of fracture process zone. Engineering Fracture Mechanics, 212, pp. 136 - 152.

Publisher

© Elsevier BV

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Engineering Fracture Mechanics and the definitive published version is available at https://doi.org/10.1016/j.engfracmech.2019.03.028.

Acceptance date

16/03/2019

Publication date

2019-03-19

Copyright date

2019

ISSN

0013-7944

Language

en