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A p-version layerwise model for large deflection of composite plates with curvilinear fibres

机译：曲线纤维复合板大挠度的p版本分层模型

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摘要

A new p-version finite element based on a zig-zag layerwise theory is developed. With the proposed model, one can accurately determine the behaviour of laminated composites with different material properties, straight or curvilinear fibres. Comparative studies with published results and with results from finite element software Abaqus are performed to verify the new model. Deflections in the linear and non-linear regimes are then calculated for several constant and variable stiffness composite laminates (VSCL), in which the fibre orientation angle varies linearly in each layer. In a few cases, VSCL plates show better performance in comparison to CSCL plates both in the linear and non-linear regimes. It is also found that it is possible to take advantage of VSCL by varying fibre orientations only in some plies of a laminate, hence reducing manufacturing costs, as well as the amount of gaps and overlaps.
机译：提出了一种基于之字形分层理论的新型p型有限元。利用所提出的模型，可以准确地确定具有不同材料特性（直线或曲线纤维）的层压复合材料的性能。对已发表的结果和有限元软件Abaqus的结果进行比较研究，以验证新模型。然后，针对几种恒定和可变刚度的复合材料层压板（VSCL）计算线性和非线性范围内的挠度，其中纤维取向角在每一层中线性变化。在少数情况下，VSCL板在线性和非线性方面均比CSCL板表现出更好的性能。还发现可以通过仅在层压制品的某些层中改变纤维取向来利用VSCL，从而降低了制造成本以及间隙和重叠的数量。

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