Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study
A two-dimensional mesoscale modeling framework, which considers concrete as a four-phase material including voids, is developed for studying the effects of voids on concrete tensile fracturing under the plane stress condition. Aggregate is assumed to behave elastically, while a continuum damaged pla...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/7989346 |
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| author | Lei Xu Yefei Huang |
| author_facet | Lei Xu Yefei Huang |
| author_sort | Lei Xu |
| collection | DOAJ |
| description | A two-dimensional mesoscale modeling framework, which considers concrete as a four-phase material including voids, is developed for studying the effects of voids on concrete tensile fracturing under the plane stress condition. Aggregate is assumed to behave elastically, while a continuum damaged plasticity model is employed to describe the mechanical behaviors of mortar and ITZ. The effects of voids on the fracture mechanism of concrete under uniaxial tension are first detailed, followed by an extensive investigation of the effects of void volume fraction on concrete tensile fracturing. It is found that both the prepeak and postpeak mesoscale cracking in concrete are highly affected by voids, and there is not a straightforward relation between void volume fraction and the postpeak behavior due to the randomness of void distribution. The fracture pattern of concrete specimen with voids is controlled by both the aggregate arrangement and the distribution of voids, and two types of failure modes are identified for concrete specimens under uniaxial tension. It is suggested that voids should be explicitly modeled for the accurate fracturing simulation of concrete on the mesoscale. |
| format | Article |
| id | doaj-art-a15162c3775f4500b1cd6be06e27e4fd |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-a15162c3775f4500b1cd6be06e27e4fd2025-02-03T05:46:14ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/79893467989346Effects of Voids on Concrete Tensile Fracturing: A Mesoscale StudyLei Xu0Yefei Huang1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaA two-dimensional mesoscale modeling framework, which considers concrete as a four-phase material including voids, is developed for studying the effects of voids on concrete tensile fracturing under the plane stress condition. Aggregate is assumed to behave elastically, while a continuum damaged plasticity model is employed to describe the mechanical behaviors of mortar and ITZ. The effects of voids on the fracture mechanism of concrete under uniaxial tension are first detailed, followed by an extensive investigation of the effects of void volume fraction on concrete tensile fracturing. It is found that both the prepeak and postpeak mesoscale cracking in concrete are highly affected by voids, and there is not a straightforward relation between void volume fraction and the postpeak behavior due to the randomness of void distribution. The fracture pattern of concrete specimen with voids is controlled by both the aggregate arrangement and the distribution of voids, and two types of failure modes are identified for concrete specimens under uniaxial tension. It is suggested that voids should be explicitly modeled for the accurate fracturing simulation of concrete on the mesoscale.http://dx.doi.org/10.1155/2017/7989346 |
| spellingShingle | Lei Xu Yefei Huang Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study Advances in Materials Science and Engineering |
| title | Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study |
| title_full | Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study |
| title_fullStr | Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study |
| title_full_unstemmed | Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study |
| title_short | Effects of Voids on Concrete Tensile Fracturing: A Mesoscale Study |
| title_sort | effects of voids on concrete tensile fracturing a mesoscale study |
| url | http://dx.doi.org/10.1155/2017/7989346 |
| work_keys_str_mv | AT leixu effectsofvoidsonconcretetensilefracturingamesoscalestudy AT yefeihuang effectsofvoidsonconcretetensilefracturingamesoscalestudy |