Optimisation of Fabric Reinforced Polymer Composites Using a Variant of Genetic Algorithm
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Optimisation of Fabric Reinforced Polymer Composites Using a Variant of Genetic Algorithm Andrei Axinte 1 & Nicolae Taranu 1 & Liliana Bejan 1 & Iuliana Hudisteanu 1
Received: 8 February 2017 / Accepted: 15 February 2017 # Springer Science+Business Media Dordrecht 2017
Abstract Fabric reinforced polymeric composites are high performance materials with a rather complex fabric geometry. Therefore, modelling this type of material is a cumbersome task, especially when an efficient use is targeted. One of the most important issue of its design process is the optimisation of the individual laminae and of the laminated structure as a whole. In order to do that, a parametric model of the material has been defined, emphasising the many geometric variables needed to be correlated in the complex process of optimisation. The input parameters involved in this work, include: widths or heights of the tows and the laminate stacking sequence, which are discrete variables, while the gaps between adjacent tows and the height of the neat matrix are continuous variables. This work is one of the first attempts of using a Genetic Algorithm (GA) to optimise the geometrical parameters of satin reinforced multi-layer composites. Given the mixed type of the input parameters involved, an original software called SOMGA (Satin Optimisation with a Modified Genetic Algorithm) has been conceived and utilised in this work. The main goal is to find the best possible solution to the problem of designing a composite material which is able to withstand to a given set of external, in-plane, loads. The optimisation process has been performed using a fitness function which can analyse and compare mechanical behaviour of different fabric reinforced composites, the results being correlated with the ultimate strains, which demonstrate the efficiency of the composite structure. Keywords Textile composites . Composite optimisation . Genetic algorithm . SOMGA
* Andrei Axinte [email protected]
1
Technical University BGh. Asachi^ Iasi, B-dul. Prof. D. Mangeron 67, 700050 Iasi, Romania
Appl Compos Mater
1 Introduction Fibre Reinforced Polymer (FRP) composites are high performance materials, combining the strength and stiffness of the fibres with the flexibility and ductility of the matrix. A controlled distribution of the fibrous reinforcement embedded in the continuous polymer phase is provided in the fabrication process. In this case, the textile reinforcements are among the best options for increasing the FRP composite performance at a reduced manufacturing cost [1], therefore the use of woven fabric as reinforcement in polymeric composite materials continues to expand in structural applications [2, 3]. The textile composites have specific mechanical properties, behaving slightly different than unidirectional reinforced composites.The fabric reinforcements are better than unidirectional fibres because they offer an improved strength and stiffness in two main directions. A laminate is built by stacking together multiple plies, carefully choosing specifi
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