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Finite element stress vibration and buckling analysis of laminated beams with the use of refined elements

机译:有限元应力振动与层合梁的屈曲分析

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Abstract: In present work, the stress, vibration and buckling finite element analysis of laminated beams is performed. Review of the equivalent single-layer (ESL) laminate theories is done. Finite element algorithms and procedures integrated into the original FEA program system and based on the classical laminated plate theory (CLPT), first-order shear deformation theory (FSDT), third-order theory of Reddy (TSDT-R) and third- order theory of Kant (TSDT-K) with the use of the Lanczos method for solving of the eigenproblem are developed. Several numerical tests and examples of bending, free vibration and buckling of multilayered and sandwich beams with various material, geometry properties and boundary conditions are solved. New effective higher-order hierarchical element for the accurate calculation of transverse shear stress is proposed. The comparative analysis of results obtained by the considered models and solutions of 2D problems of the heterogeneous anisotropic elasticity is fulfilled. !14
机译:摘要:在目前的工作中,进行了层合梁的应力,振动和屈曲有限元分析。对等效单层(ESL)层压板理论进行了回顾。有限元算法和程序已集成到原始FEA程序系统中,并基于经典层压板理论(CLPT),一阶剪切变形理论(FSDT),雷迪三阶理论(TSDT-R)和三阶理论利用Lanczos方法解决本征问题,开发了Kant(TSDT-K)的方法。解决了具有不同材料,几何特性和边界条件的多层和夹层梁的几个数值测试和弯曲,自由振动和屈曲的示例。提出了一种新的有效的高阶层次单元,用于精确计算横向剪应力。通过考虑的模型和二维各向异性各向异性问题的解决方案,对结果进行了比较分析。 !14

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