The interaction between microcapsules with different sizes and propagating cracks

authored by
Xiaoying Zhuang, Hung Nguyen-Xuan, Shuai Zhou
Abstract

The microcapsule-contained self-healing materials are appealing since they can heal the cracks automatically and be effective for a long time. Although many experiments have been carried out, the influence of the size of microcapsules on the self-healing effect is still not well investigated. This study uses the two-dimensional discrete element method (DEM) to investigate the interaction between one microcapsule and one microcrack. The influence of the size of microcapsules is considered. The potential healing time and the influence of the initial damage are studied. The results indicate that the coalescence crack is affected by the size of holes. The elastic modulus, the compressive strength and the coalescence stress decrease with the rising radius of holes. The initial damage in experiments should be greater than 95% of the compressive strength to enhance the self-healing effect. The large microcapsules require slight initial damage. Both a new type of displacement field near the crack and a new category of coalescence crack are observed. The influence of sizes of holes on the cracking behavior of concrete with a circular hole and a pre-existing crack is clarified.

Organisation(s)
Institute of Continuum Mechanics
External Organisation(s)
Tongji University
Vietnam National University Ho Chi Minh City
Sejong University
Chongqing University
Type
Article
Journal
Computers, Materials and Continua
Volume
67
Pages
577-593
No. of pages
17
ISSN
1546-2218
Publication date
12.01.2021
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Biomaterials, Modelling and Simulation, Mechanics of Materials, Computer Science Applications, Electrical and Electronic Engineering
Electronic version(s)
https://doi.org/10.32604/cmc.2021.014688 (Access: Open)
 

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