Generation of a short fibre biocomposite representative volume element

Thomas, Kelli L., Bryce, Holly C. A. and Heitzmann, Michael T. (2015). Generation of a short fibre biocomposite representative volume element. In: Dilum Fernando, Jin-Guang Teng and Jose L. Torero, Proceedings of the Second International Conference on Performance-based and Life-cycle Structural Engineering (PLSE 2015). International Conference on Performance-based and Life-cycle Structural Engineering, Brisbane, QLD, Australia, (121-132). 9-11 December 2015. doi:10.14264/uql.2016.500

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Author Thomas, Kelli L.
Bryce, Holly C. A.
Heitzmann, Michael T.
Title of paper Generation of a short fibre biocomposite representative volume element
Conference name International Conference on Performance-based and Life-cycle Structural Engineering
Conference location Brisbane, QLD, Australia
Conference dates 9-11 December 2015
Proceedings title Proceedings of the Second International Conference on Performance-based and Life-cycle Structural Engineering (PLSE 2015)
Place of Publication Brisbane, QLD, Australia
Publisher School of Civil Engineering, The University of Queensland
Publication Year 2015
Sub-type Fully published paper
DOI 10.14264/uql.2016.500
Open Access Status File (Publisher version)
ISBN 9781742721477
Editor Dilum Fernando
Jin-Guang Teng
Jose L. Torero
Start page 121
End page 132
Total pages 12
Language eng
Abstract/Summary One of the greatest challenge in working with natural fibre composites is the large variation in mechanical properties that result from the geometric inconsistency amongst fibres. Traditional design tools and models are unable to accurately incorporate this non-homogeneity to predict the resulting local behaviour of biocomposite materials. The following paper presents a methodology to generate a representative volume element (RVE) to simulate the material microstructure of short fibre composites, with the intent of modelling the popular class of short fibre biocomposites materials. The capabilities of a range of particle packing algorithms used in literature are compared in terms of the maximum volume fraction they have been able to achieve and for what fibre length to diameter aspect ratio. The methodology is able to account for the characteristics of fibre geometry samples, according to their probability density functions (PDFs). The RVE generation strategy imposes periodic boundary conditions and fibres are declared invalid if an intersection between fibres is detected. The effect of different PDFs on the resulting RVE are discussed. An RVE populated with data following a Weibull distribution is compared to that from normally distributed data with an equal mean but varied standard deviations. Using a Weibull distribution to simulate the characteristics of an RVE requires a significantly higher number of fibres than any comparable normal distribution, due to the skewness of the data towards large values at low probabilities. The highest volume fraction achieved was 40% for an RVE containing fibres with lengths distributed according to a Weibull distribution and aspect ratios of 15. The future intent of this work is to perform finite element analysis on RVE samples with a range of varied microstructure characteristics to determine the effect on overall composite properties, which will provide new insights on how best to formulate short fibre compounds.
Keyword Biocomposites
representative volume element
probabilistic design
particle packing
volume fraction
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Tue, 09 Aug 2016, 11:29:58 EST by Christopher O'Keefe on behalf of Learning and Research Services (UQ Library)