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Modeling size-dependent thermal-mechanical behaviors of shape memory polymer Timoshenko micro-beam

Fei Zhao (China University of Petroleum (East China), Qingdao, China)
Xueyao Zheng (China University of Petroleum (East China), Qingdao, China)
Shichen Zhou (China University of Petroleum (East China), Qingdao, China)
Bo Zhou (China University of Petroleum (East China), Qingdao, China)
Shifeng Xue (China University of Petroleum (East China), Qingdao, China)

Multidiscipline Modeling in Materials and Structures

ISSN: 1573-6105

Article publication date: 18 March 2021

Issue publication date: 7 June 2021

94

Abstract

Purpose

In this paper, a three-dimensional size-dependent constitutive model of SMP Timoshenko micro-beam is developed to describe the micromechanical properties.

Design/methodology/approach

According to the Hamilton's principle, the equilibrium equations and boundary conditions of the model are established and according to the modified couple stress theory, the model is available to capturing the size effect because of the material length scale parameter. Based on the model, the simply supported beam was taken for example to be solved and simulated.

Findings

Results show that the size effect of SMP micro-beam is more obvious when the dimensionless beam height is similar or the larger of the value of loading time. The rigidity and strength of the SMP beam decrease with the increasing of the dimensionless beam height or the loading time. The viscous property of SMP micro-beam plays a more important role with the larger dimensionless beam height. And the smaller the dimensionless beam height is, the more obvious the shape memory effect of the SMP micro-beam is.

Originality/value

This work implies prediction of size-dependent thermo-mechanical behaviors of the SMP micro-beam and will provide a theoretical basis for design SMP microstructures in the field of micro/nanomechanics.

Keywords

Acknowledgements

The authors of this paper acknowledge the supports from the National Key Research and Development Program of China (Grant No. 2017YFC0307604), the Talent Foundation of China University of Petroleum (Grant No. Y1215042) and the Graduate Innovation Program of China University of Petroleum (Grant No. YCX2020074).

Citation

Zhao, F., Zheng, X., Zhou, S., Zhou, B. and Xue, S. (2021), "Modeling size-dependent thermal-mechanical behaviors of shape memory polymer Timoshenko micro-beam", Multidiscipline Modeling in Materials and Structures, Vol. 17 No. 4, pp. 747-759. https://doi.org/10.1108/MMMS-12-2020-0290

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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