Characterization and Micromechanical Modelling of a Temperature Dependent Hyper-viscoelastic Polymer Bonded Explosive

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dc.contributor.authorLi-Mayer, Joanna
dc.contributor.authorWilliamson, D.
dc.contributor.authorLewis, D.
dc.contributor.authorConnors, S.
dc.contributor.authorIqbal, M.
dc.contributor.authorCharalambides, M. N.
dc.date.accessioned2024-05-05T12:13:21Z
dc.date.available2024-05-05T12:13:21Z
dc.date.issued2017-11-15 12:01
dc.description.abstractTechnical paper presented at the 2017 Defence and Security Doctoral Symposium. Polymer bonded explosives (PBXs) are highly filled binary particulate composites, typically >90% volume fraction. The composites consist of a compliant matrix binder and rigid filler crystals. In order to predict the bulk composite behaviour, the polymer matrix material properties and a suitable constitutive model was determined for use in a multi-scale micromechanical finite element model.The matrix material was characterized using monotonic tensile tests at room temperature as well as small strain and large strain shear rheometric tests at different temperatures. A temperature-dependent visco-hyperelastic constitutive model combining the use of the Prony series and the Van der Waals potential was used to describe the matrix material behaviour. Material parameters at room temperature were first optimized by minimisation of the error function between the experimental and predicted behaviour (MATLAB, MathWorks). Temperature dependence for higher temperatures was then determined using time-temperature superposition. A 3D micromechanical finite element model, reconstructed from X-Ray tomographic data, was used for prediction of the composite fracture behaviour. Due to the loss of the smaller filler particles during image processing, a multi-scale hierarchical model was developed to incorporate the missing volume fraction.
dc.description.sponsorshipAWE
dc.identifier.citationLi-Mayer, Joanna; Williamson, D.; Lewis, D.; Connors, S.; Iqbal, M.; Charalambides, M. N. (2017). Characterization and Micromechanical Modelling of a Temperature Dependent Hyper-viscoelastic Polymer Bonded Explosive. Cranfield Online Research Data (CORD). Journal contribution. https://doi.org/10.17862/cranfield.rd.5589964.v1
dc.identifier.doi10.17862/cranfield.rd.5589964.v1
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/21525
dc.identifier.urihttps://doi.org/10.17862/cranfield.rd.5589964.v1
dc.publisherCranfield University
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject'Particulate composites'
dc.subject'High volume fraction'
dc.subject'Multi-scale modelling'
dc.subject'DSDS17 technical paper'
dc.subject'DSDS17'
dc.subject'Simulation and Modelling'
dc.subject'Polymers and Plastics'
dc.titleCharacterization and Micromechanical Modelling of a Temperature Dependent Hyper-viscoelastic Polymer Bonded Explosive
dc.typeTechnical report

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