Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious Composites
Cementitious composites with microencapsulated healing agents are appealing due to the advantages of self-healing. The polymeric shell and polymeric healing agents in microcapsules have been proven effective in self-healing, while these microcapsules decrease the effective elastic properties of ceme...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/12/2990 |
| _version_ | 1797544598175744000 |
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| author | Shuai Zhou Yue Jia Chong Wang |
| author_facet | Shuai Zhou Yue Jia Chong Wang |
| author_sort | Shuai Zhou |
| collection | DOAJ |
| description | Cementitious composites with microencapsulated healing agents are appealing due to the advantages of self-healing. The polymeric shell and polymeric healing agents in microcapsules have been proven effective in self-healing, while these microcapsules decrease the effective elastic properties of cementitious composites before self-healing happens. The reduction of effective elastic properties can be evaluated by micromechanics. The substantial complicacy included in micromechanical models leads to the need of specifying a large number of parameters and inputs. Meanwhile, there are nonlinearities in input–output relationships. Hence, it is a prerequisite to know the sensitivity of the models. A micromechanical model which can evaluate the effective properties of the microcapsule-contained cementitious material is proposed. Subsequently, a quantitative global sensitivity analysis technique, the Extended Fourier Amplitude Sensitivity Test (EFAST), is applied to identify which parameters are required for knowledge improvement to achieve the desired level of confidence in the results. Sensitivity indices for first-order effects are computed. Results show the volume fraction of microcapsules is the most important factor which influences the effective properties of self-healing cementitious composites before self-healing. The influence of interfacial properties cannot be neglected. The research sheds new light on the influence of parameters on microcapsule-contained self-healing composites. |
| first_indexed | 2024-03-10T14:03:44Z |
| format | Article |
| id | doaj.art-36862ced02e443c5b27309ae9b7b44b8 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T14:03:44Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-36862ced02e443c5b27309ae9b7b44b82023-11-21T00:53:31ZengMDPI AGPolymers2073-43602020-12-011212299010.3390/polym12122990Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious CompositesShuai Zhou0Yue Jia1Chong Wang2College of Materials Science and Engineering, Chongqing University, Chongqing 400045, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400045, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400045, ChinaCementitious composites with microencapsulated healing agents are appealing due to the advantages of self-healing. The polymeric shell and polymeric healing agents in microcapsules have been proven effective in self-healing, while these microcapsules decrease the effective elastic properties of cementitious composites before self-healing happens. The reduction of effective elastic properties can be evaluated by micromechanics. The substantial complicacy included in micromechanical models leads to the need of specifying a large number of parameters and inputs. Meanwhile, there are nonlinearities in input–output relationships. Hence, it is a prerequisite to know the sensitivity of the models. A micromechanical model which can evaluate the effective properties of the microcapsule-contained cementitious material is proposed. Subsequently, a quantitative global sensitivity analysis technique, the Extended Fourier Amplitude Sensitivity Test (EFAST), is applied to identify which parameters are required for knowledge improvement to achieve the desired level of confidence in the results. Sensitivity indices for first-order effects are computed. Results show the volume fraction of microcapsules is the most important factor which influences the effective properties of self-healing cementitious composites before self-healing. The influence of interfacial properties cannot be neglected. The research sheds new light on the influence of parameters on microcapsule-contained self-healing composites.https://www.mdpi.com/2073-4360/12/12/2990polymeric healing agentsself-healing compositesglobal sensitivity analysisextended Fourier amplitude sensitivity testmicromechanics |
| spellingShingle | Shuai Zhou Yue Jia Chong Wang Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious Composites Polymers polymeric healing agents self-healing composites global sensitivity analysis extended Fourier amplitude sensitivity test micromechanics |
| title | Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious Composites |
| title_full | Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious Composites |
| title_fullStr | Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious Composites |
| title_full_unstemmed | Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious Composites |
| title_short | Global Sensitivity Analysis for the Polymeric Microcapsules in Self-Healing Cementitious Composites |
| title_sort | global sensitivity analysis for the polymeric microcapsules in self healing cementitious composites |
| topic | polymeric healing agents self-healing composites global sensitivity analysis extended Fourier amplitude sensitivity test micromechanics |
| url | https://www.mdpi.com/2073-4360/12/12/2990 |
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