Modelling variability in composite fibre reinforcement geometry data

Abstract eng:
Non-determinism requires much attention in the certification procedure of complicated structural components. Composite materials are gaining much interest because of their high performance, especially for transportation applications. However, the multitude of design, material and process parameters add to the complexity of the analysis, and procedures for certification and quality assurance are demanding. Uncertainty and scatter on critical material parameters need to be quantified in close relation to the application and also to the production process which is used, with a particular focus on the geometrical characteristics of the fibre reinforcement architecture. This paper proposes a procedure to experimentally identify the statistical characteristics on physical realisations of the material and to subsequently generate a population of Virtual samples which possesses the same statistical characteristics as the real components. Virtual models allow for a much wider and cheaper analysis of product performance and they replace the expensive campaign with repeated physical experiments.

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