Download PDF by Antonio Miravete: Optimisation of composite structures design

By Antonio Miravete

ISBN-10: 0857092979

ISBN-13: 9780857092977

ISBN-10: 1855732084

ISBN-13: 9781855732087

Within the e-book, Professor Miravete demonstrates the optimisation of beams, plates and sandwich buildings within the designs of complex composite fabrics. He additionally illustrates optimum fabric platforms, fibre orientations and lay-up via capabilities of geometry, load kind and boundary stipulations. The affiliates software program, on disks, will permit clients to conform the data to their very own requisites and is especially trouble-free with worthy manuals. this can be a vital package deal for designers and engineers in quite a lot of parts, from aeronautics to automobile and marine in addition to normal undefined.

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Optimum configurations and weight savings are reported for several types of plates, loads, and boundary conditions. Two-dimensional laminated composite plates are also analysed. Since the 2-D plane strain model can only be used for the 1-D case, a more general model based on a higher order shear theory is used. This method is efficient and accurate, not only because the analysis is carried out very fast, but also because the required number of nodes of the mesh is not large, and the results from the shear deformation theory used here and the 2-D plane strain model are very close.

However for graphite composites which have stiff fibres the model is not accurate. For the purpose of design, it is best to use the experimentally measured fabric data directly, replacing the ply data of a unidirectional composite. Further development of the model for the fibre cross over will include the degraded fibre stiffness and strength. 1 Comparison of [0/90] and woven fabric The predictions of elastic constants of fabrics, filament-wound and braided structures can be made if it is possible to replace the woven composite by a multidirectional laminate consisting of the same fibre angles and ply group ratios.

1 Model assumptions and method of analysis The model is used with the following assumptions: • This study is limited to one-dimensional laminated composite plates, in order to avoid 3-D effects and to analyse properly the consequences of the variable thickness effect. • The fibre orientation is longitudinal (x-direction). This is the optimal direction for 1-D laminated composite plates. 118 • The material used is graphite/epoxy AS4/3501-6. The following method of analysis was used: • A 2-D plane strain ftnite element model.

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Optimisation of composite structures design by Antonio Miravete


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