Effect of reinforcement bending on the elastic properties of interpenetrating phase composites

The elastic modulus of interpenetrating phase composites (IPCs) was analyzed through a theoretical model that accounted for bending deformation of the reinforcement phase. The model was validated against literature data, as well as simulation and experimental results of IPCs that were constructed fr...

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Main Authors: Seetoh, Ian, Markandan, Kalaimani, Lai, Chang Quan
Other Authors: Temasek Laboratories
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/144394
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1443942021-02-03T03:07:32Z Effect of reinforcement bending on the elastic properties of interpenetrating phase composites Seetoh, Ian Markandan, Kalaimani Lai, Chang Quan Temasek Laboratories Engineering::Materials Interpenetrating Phase Composites Octet Truss The elastic modulus of interpenetrating phase composites (IPCs) was analyzed through a theoretical model that accounted for bending deformation of the reinforcement phase. The model was validated against literature data, as well as simulation and experimental results of IPCs that were constructed from 3D-printed polymeric reinforcements embedded in a polydimethylsiloxane (PDMS) matrix. The reinforcements were in the form of Octet Truss and Kelvin Cell lattices, which are known to exhibit very different degrees of bending during elastic deformation. When the matrix modulus was relatively low, the model was able to explain how the bending of reinforcement struts caused the overall IPC modulus to be much lower than those predicted by other theoretical models. As the matrix modulus increased to beyond 20% that of the reinforcement material, however, the different lattice designs were found to have no significant influence on the IPC modulus. Further increase in matrix modulus pushed the elastic response of IPCs towards the isostrain limit, as the matrix helped to distribute the load more evenly and suppress the bending of struts, especially for lower density lattices. The model was able to account for a wide range of different constituent moduli and was also applicable to IPCs which utilized stochastic foams for reinforcement. The insights derived in this study is expected to be particularly useful for designing polymer-based IPCs where the elastic moduli of the reinforcement and matrix can differ over several orders of magnitude. Accepted version The authors would like to acknowledge funding for this project by the Temasek Research Fellowship (grant no. M4061969.680). 2020-11-03T02:50:53Z 2020-11-03T02:50:53Z 2019 Journal Article Seetoh, I., Markandan, K., & Lai, C. Q. (2019). Effect of reinforcement bending on the elastic properties of interpenetrating phase composites. Mechanics of Materials, 136, 103070-. doi:10.1016/j.mechmat.2019.103071 0167-6636 https://hdl.handle.net/10356/144394 10.1016/j.mechmat.2019.103071 136 en Mechanics of Materials © 2019 Elsevier Ltd. All rights reserved. This paper was published in Mechanics of Materials and is made available with permission of Elsevier Ltd. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Interpenetrating Phase Composites
Octet Truss
spellingShingle Engineering::Materials
Interpenetrating Phase Composites
Octet Truss
Seetoh, Ian
Markandan, Kalaimani
Lai, Chang Quan
Effect of reinforcement bending on the elastic properties of interpenetrating phase composites
description The elastic modulus of interpenetrating phase composites (IPCs) was analyzed through a theoretical model that accounted for bending deformation of the reinforcement phase. The model was validated against literature data, as well as simulation and experimental results of IPCs that were constructed from 3D-printed polymeric reinforcements embedded in a polydimethylsiloxane (PDMS) matrix. The reinforcements were in the form of Octet Truss and Kelvin Cell lattices, which are known to exhibit very different degrees of bending during elastic deformation. When the matrix modulus was relatively low, the model was able to explain how the bending of reinforcement struts caused the overall IPC modulus to be much lower than those predicted by other theoretical models. As the matrix modulus increased to beyond 20% that of the reinforcement material, however, the different lattice designs were found to have no significant influence on the IPC modulus. Further increase in matrix modulus pushed the elastic response of IPCs towards the isostrain limit, as the matrix helped to distribute the load more evenly and suppress the bending of struts, especially for lower density lattices. The model was able to account for a wide range of different constituent moduli and was also applicable to IPCs which utilized stochastic foams for reinforcement. The insights derived in this study is expected to be particularly useful for designing polymer-based IPCs where the elastic moduli of the reinforcement and matrix can differ over several orders of magnitude.
author2 Temasek Laboratories
author_facet Temasek Laboratories
Seetoh, Ian
Markandan, Kalaimani
Lai, Chang Quan
format Article
author Seetoh, Ian
Markandan, Kalaimani
Lai, Chang Quan
author_sort Seetoh, Ian
title Effect of reinforcement bending on the elastic properties of interpenetrating phase composites
title_short Effect of reinforcement bending on the elastic properties of interpenetrating phase composites
title_full Effect of reinforcement bending on the elastic properties of interpenetrating phase composites
title_fullStr Effect of reinforcement bending on the elastic properties of interpenetrating phase composites
title_full_unstemmed Effect of reinforcement bending on the elastic properties of interpenetrating phase composites
title_sort effect of reinforcement bending on the elastic properties of interpenetrating phase composites
publishDate 2020
url https://hdl.handle.net/10356/144394
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