The effects of interfacial strength on fractured microcapsule

The effects of interfacial strength on fractured microcapsule are investigated numerically. The interaction between crack and microcapsule embedded in mortar matrix is modeled based on cohesive approach. The microcapsules are modelled with variation of core-shell thickness ratio and potential cracks...

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Bibliographic Details
Published in:Frontiers of Structural and Civil Engineering 2019-04, Vol.13 (2), p.353-363
Main Authors: Mauludin, Luthfi Muhammad, Oucif, Chahmi
Format: Article
Language:English
Subjects:
Bearing strength
Boundary element method
Carrying capacity
Cities
Civil Engineering
Cohesion
Countries
Crack propagation
Engineering
Fracture mechanics
Fracture strength
Fractures
Interfaces
Interfacial strength
Load carrying capacity
Mathematical models
Mechanical properties
Microcapsules
Mortars (material)
Regions
Research Article
Self healing materials
Shells
Thickness ratio
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Summary:The effects of interfacial strength on fractured microcapsule are investigated numerically. The interaction between crack and microcapsule embedded in mortar matrix is modeled based on cohesive approach. The microcapsules are modelled with variation of core-shell thickness ratio and potential cracks are represented by pre-inserted cohesive elements along the element boundaries of the mortar matrix, microcapsules core, microcapsule shell, and at the interfaces between these phases. Special attention is given to the effects of cohesive fracture on the microcapsule interface, namely fracture strength, on the load carrying capacity and fracture probability of the microcapsule. The effect of fracture properties on microcapsule is found to be significant factor on the load carrying capacity and crack propagation characteristics. Regardless of core-shell thickness ratio of microcapsule, the load carrying capacity of self-healing material under tension increases as interfacial strength of microcapsule shell increases. In addition, given the fixed fracture strength of the interface of microcapsule shell, the higher the ratio core-shell thickness, the higher the probability of microcapsules being fractured.
ISSN:2095-2430
2095-2449
DOI:10.1007/s11709-018-0469-3