To read the full version of this content please select one of the options below:

Numerical investigation into effect of self-healing composite microcapsules thickness and diameter on their failure strength

Raj Kumar Pittala (Department of Mechanical Engineering, National Institute of Technology Warangal, Warangal, India)
Satish Ben B. (Department of Mechanical Engineering, National Institute of Technology Warangal, Warangal, India)
Syam Kumar Chokka (Department of Mechanical Engineering, National Institute of Technology Warangal, Warangal, India)
Niranjan Prasad (Department of Mechanical Engineering, National Institute of Technology Warangal, Warangal, India)

World Journal of Engineering

ISSN: 1708-5284

Article publication date: 6 April 2021

Issue publication date: 28 May 2021

80

Abstract

Purpose

Microcapsule-embedded autonomic healing materials have the ability to repair microcracks when they come into contact with the crack by releasing the healing agent. The microcapsules with specific shape and thickness effect in releasing healing agent to the cracked surfaces. Thus, the purpose of this paper is to know the load bearing capacity of the self-healing microcapsules and the stresses developed in the material.

Design/methodology/approach

In the present study, self-healing microcapsule is modelled and integrated with the polymer matrix composite. The aim of the present study is to investigate failure criteria of Poly (methyl methacrylate) microcapsules by varying the shell thickness, capsule diameter and loading conditions. The strength of the capsule is evaluated by keeping the shell thickness as constant and varying the capsule diameter. Uniformly distributed pressure loads were applied on the capsule-reinforced polymer matrix composite to assess the failure strength of capsules and composite.

Findings

It is observed from the results that the load required to break the capsules is increasing with the increase in capsule diameter. The failure strength of microcapsule with 100 µm diameter and 5 µm thickness is observed as 255 MPa. For an applied load range of 40–160 N/mm2 on the capsules embedded composite, the maximum stress developed in the capsules is observed as 308 MPa.

Originality/value

Failure strengths of microcapsules and stresses developed in the microcapsule-reinforced polymer composites were evaluated.

Keywords

Acknowledgements

The authors would like to thank SERB, a statutory body of Department of Science and Technology (DST)-India for supporting financially to accomplish this research. This work was supported by DST-SERB Program 2017 under Grant Number ECR/2017/000238.

Citation

Pittala, R.K., B., S.B., Chokka, S.K. and Prasad, N. (2021), "Numerical investigation into effect of self-healing composite microcapsules thickness and diameter on their failure strength", World Journal of Engineering, Vol. 18 No. 3, pp. 373-378. https://doi.org/10.1108/WJE-12-2019-0359

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

Related articles