Chu, Yantao;
Sun, Lingyu;
Yang, Xudong;
Wang, Jinxi;
Huang, Wei;
(2021)
Multiscale simulation and theoretical prediction for the elastic properties of unidirectional fiber‐reinforced polymer containing random void defects.
Polymer Composites
, 42
(6)
pp. 2958-2972.
10.1002/pc.26028.
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Multiscale simulation and theoretical prediction for the elastic properties of unidirectional fiber-reinforced polymer containing random void defects(1).pdf - Accepted Version Download (569kB) | Preview |
Abstract
Polymer-matrix composites are widely used in various industries due to their high specific strength and specific stiffness. However, the void formation is inevitable as a by-product during manufacturing processes, which may have negative effects on its mechanical properties. The purposes of this paper are to quantitatively evaluate the influence of voids on the anisotropic elastic properties of composites and to provide corresponding theoretical prediction models. Firstly, three-dimensional representative volume elements (RVE) of fiber-reinforced composite materials with different fiber contents (36.37%, 45.47%, 50.92%) and different void contents (1%, 3%, 5%, 7%) are established. To obtain the elastic properties in different directions, various periodic boundary conditions are applied to the RVE models and corresponding subroutines are developed by ABAQUS-PYTHON. Secondly, a series of theoretical models are proposed to quickly predict the anisotropic elastic properties of unidirectional fiber/epoxy composites containing random-sized void defects, which agree well with the finite element simulation results. Especially, the proposed models have concise expressions, which require only a few parameters to be input, and hence they are convenient for engineering application. Both theoretical and numerical results show that void defects have an obvious influence on the transverse modulus, major Poisson's ratio, and the out-of-plane shear modulus. When the void volume reaches 7%, all of the properties mentioned above decrease by more than 10% for the FRPs studied.
| Type: | Article |
|---|---|
| Title: | Multiscale simulation and theoretical prediction for the elastic properties of unidirectional fiber‐reinforced polymer containing random void defects |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/pc.26028 |
| Publisher version: | https://doi.org/10.1002/pc.26028 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | simulations, theory, unidirectional composites, voids |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10157225 |
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