当前位置: X-MOL 学术Int. J. Non-Linear Mech. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Nonlinear dynamic responses of layered skew sandwich composite structure and experimental validation
International Journal of Non-Linear Mechanics ( IF 2.8 ) Pub Date : 2020-06-03 , DOI: 10.1016/j.ijnonlinmec.2020.103527
Pankaj V. Katariya , Kulmani Mehar , Subrata Kumar Panda

The time-dependent deflection responses of the mechanically excited layered skew sandwich shell panels are computed numerically via a generic model developed mathematically using the higher-order shear deformation theory including the effects of the large displacement. The model includes the large displacements associated with the structural distortion under the small strain regime through Green–Lagrange nonlinear strain kinematics. The derived nonlinear system governing equation is converted to a set of algebraic form with the help of finite element steps. Subsequently, the time-dependent displacement values are computed numerically through the direct iterative technique including Newmark’s integration scheme. The dynamic deflections of the sandwich structural component under the influence of the externally excited mechanical loading are obtained through a generic computer code (developed in MATLAB) via the nonlinear higher-order finite element model. Before the implementation of the proposed model for the sandwich analysis, the solution stability and accuracy have been established by solving different kinds of numerical example from the published domain. Additionally, a few layered sandwich plates of different face sheet layers have been fabricated and the experimental dynamic data are recorded for the comparison purpose with the help of available modal test rig. Finally, the influences of the different structure-dependent design parameters on the nonlinear dynamic responses are investigated using the presently developed numerical model of skew sandwich shell panel, which also reveals that the present results give more accurate results.



中文翻译:

层状斜夹层复合结构的非线性动力响应及实验验证。

机械激发的分层斜交夹心板的时变挠度响应是通过使用高阶剪切变形理论(包括大位移影响)通过数学模型开发的通用模型,通过数值计算得到的。该模型包括通过Green-Lagrange非线性应变运动学在小应变状态下与结构变形相关的大位移。借助有限元步骤,将导出的非线性系统控制方程转换为一组代数形式。随后,通过包括Newmark积分方案的直接迭代技术,对与时间有关的位移值进行数值计算。通过通用计算机代码(在MATLAB中开发),通过非线性高阶有限元模型,获得了在外部激励机械载荷的影响下,三明治结构构件的动态挠度。在实施提出的夹心分析模型之前,已经通过解决公开领域中的各种数值示例来建立了解的稳定性和准确性。另外,已经制造了几层不同面板层的夹心板,并在可用模态试验台的帮助下记录了实验动态数据以进行比较。最后,

更新日期:2020-06-03
down
wechat
bug