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论文类型：期刊论文

发表时间：2014-08-01

发表刊物：COMPTES RENDUS MECANIQUE

收录刊物：SCIE

卷号：342

期号：8

页面范围：490-500

ISSN号：1631-0721

关键字：Fracture mechanics; Concrete; Fracture toughness; T-stress

摘要：T-stress expressions are provided for three-point bending (TPB) beams and compact tension (CT) specimens and then its influence on mode I fracture toughness of concrete is investigated. The study shows that T-stress is dependent on the specimen's geometry and the material's property as well, and for TPB and CT specimens of regular size, T-stress is so small that its consequences can be neglected. The study also indicates that concrete specimen size should be carefully chosen to make sure the existence of K-dominance ahead of the crack tip, thus fracture toughness extracted from these specimen configurations can be reliable. (C) 2014 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.