The 3D failure process in polymeric syntactic foams with different cenosphere volume fractions

Huang, R., Li, P., Liu, T. and Xu, J. (2019) The 3D failure process in polymeric syntactic foams with different cenosphere volume fractions. Journal of Applied Polymer Science, 136(19), 47491. (doi:10.1002/app.47491)

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Abstract

The previous work (Huang and Li, Compos. Part B, 2015) proposed the failure mechanism in syntactic foams with low and high hollow microsphere volume fractions, based on the finite element simulation of localized stresses in the foam. In this work, in situ X‐ray microtomography of uniaxial compression tests was performed to provide the direct experimental evidence to the proposed mechanism by tracking the internal three‐dimensional failure process in epoxy syntactic foams with different cenosphere volume fractions (V). It was found that for both the low and high V, microcracks initiate in the matrix in the top and bottom of crushed cenospheres where the tensile stress concentrates, and then propagate longitudinally to become macrocracks. Increasing the cenosphere volume fraction also leads to the formation of matrix microcracks in the connection zone where the stress concentrates significantly; the matrix microcracks thus propagate diagonally and longitudinally in the high V foam.

Item Type:Articles
Additional Information:R.H. acknowledges the Research Student Scholarship at Nanyang Technological University in Singapore for his PhD study during which this work was carried out.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Peifeng
Authors: Huang, R., Li, P., Liu, T., and Xu, J.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Applied Polymer Science
Publisher:Wiley
ISSN:0021-8995
ISSN (Online):1097-4628
Published Online:11 January 2019
Copyright Holders:Copyright © 2019 Wiley Periodicals, Inc.
First Published:First published in Journal of Applied Polymer Science 136(19): 47491
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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