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Survey of procedures in use for permeability measurements in liquid composite moulding processes.

Aktas, A; Sims, G D; Lira, C*; Stojkovic, M* (2016) Survey of procedures in use for permeability measurements in liquid composite moulding processes. NPL Report. MAT 82

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This report presents the results of an international survey of permeability measurement procedures used to support development and use of liquid moulding processes. The purpose of the survey has been to collate information, identify measurement issues and generate a reference document for future international benchmarking, round-robin and standardisation activities. The survey results are representative and the number of respondents to the survey is satisfactory and of high quality, as sent to specific organisations that are expert in this measurement area.

From the responses, all organisations conduct measurements based on Darcy's law, but using their in-house built test rigs and their own methodologies developed from many years of research in this field. In general, unsaturated (by monitoring pressure and flow front) and saturated (by monitoring pressure and flow rate) measurements are conducted. Currently, there are no measurement standards, standardised test rigs, standard reinforcement materials, or standard test fluids available. It is noted that model fluids are overwhelmingly used (c.f. resins, catalysed or uncatalysed)

In parallel to this international permeability survey, the National Physical Laboratory and the National Composites Centre will integrate the survey responses and Benchmark procedure into a draft for future standardisation.

Item Type: Report/Guide (NPL Report)
NPL Report No.: MAT 82
Keywords: Permeability, Liquid Composite Moulding processes
Subjects: Advanced Materials
Advanced Materials > Composites
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/7091

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