Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion

Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion

This paper investigates the unstable fracture toughness of specimens of different heights using the double-K model for three-point bending tests on notched concrete beams. It is shown that unstable fracture toughness exhibits a significant size effect. The modified maximum tangential stress (MMTS) c...

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Main Authors: Jian Li, Zhao-Wen Du, Zhong-Ping Guo, De-Chun Ai
Format: Article
Language:English
Published: Hindawi Limited 2020-01-01
Series:Advances in Civil Engineering
Online Access:http://dx.doi.org/10.1155/2020/3986367
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spelling doaj-a5fe98a7c092450594c8865c3a59f7872020-11-25T02:48:50ZengHindawi LimitedAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/39863673986367Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) CriterionJian Li0Zhao-Wen Du1Zhong-Ping Guo2De-Chun Ai3College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mining and Civil Engineering, Liupanshui Normal University, Liupanshui 553004, ChinaThis paper investigates the unstable fracture toughness of specimens of different heights using the double-K model for three-point bending tests on notched concrete beams. It is shown that unstable fracture toughness exhibits a significant size effect. The modified maximum tangential stress (MMTS) criterion is used to explain the size effect of unstable fracture toughness. The MMTS criterion considers the higher order terms of the Williams series expansion of the stress field. The results show that the MMTS criterion can reasonably estimate unstable fracture toughness. It is recommended that the minimum height of the specimen be 200 mm when three-point bending tests on notched beams are used to determine unstable fracture toughness.http://dx.doi.org/10.1155/2020/3986367
collection DOAJ
language English
format Article
sources DOAJ
author Jian Li
Zhao-Wen Du
Zhong-Ping Guo
De-Chun Ai
spellingShingle Jian Li
Zhao-Wen Du
Zhong-Ping Guo
De-Chun Ai
Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion
Advances in Civil Engineering
author_facet Jian Li
Zhao-Wen Du
Zhong-Ping Guo
De-Chun Ai
author_sort Jian Li
title Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion
title_short Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion
title_full Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion
title_fullStr Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion
title_full_unstemmed Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion
title_sort research on the size effect of unstable fracture toughness by the modified maximum tangential stress (mmts) criterion
publisher Hindawi Limited
series Advances in Civil Engineering
issn 1687-8086
1687-8094
publishDate 2020-01-01
description This paper investigates the unstable fracture toughness of specimens of different heights using the double-K model for three-point bending tests on notched concrete beams. It is shown that unstable fracture toughness exhibits a significant size effect. The modified maximum tangential stress (MMTS) criterion is used to explain the size effect of unstable fracture toughness. The MMTS criterion considers the higher order terms of the Williams series expansion of the stress field. The results show that the MMTS criterion can reasonably estimate unstable fracture toughness. It is recommended that the minimum height of the specimen be 200 mm when three-point bending tests on notched beams are used to determine unstable fracture toughness.
url http://dx.doi.org/10.1155/2020/3986367
work_keys_str_mv AT jianli researchonthesizeeffectofunstablefracturetoughnessbythemodifiedmaximumtangentialstressmmtscriterion
AT zhaowendu researchonthesizeeffectofunstablefracturetoughnessbythemodifiedmaximumtangentialstressmmtscriterion
AT zhongpingguo researchonthesizeeffectofunstablefracturetoughnessbythemodifiedmaximumtangentialstressmmtscriterion
AT dechunai researchonthesizeeffectofunstablefracturetoughnessbythemodifiedmaximumtangentialstressmmtscriterion
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