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Transient response of composite sandwich plates

机译：复合夹芯板的瞬态响应

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摘要

The transient response of orthotropic, layered composite sandwich plates is investigated by using two new C~0 four and nine node finite element formulations of a refined form of Reddy's higher-order theory. This refined third order theory accounts for parabolic variation of the transverse shear stresses, and requires no shear correction factors. The assumed strain approach is employed to model both thin and thick plates without any major defects like shear locking and parasitic spurious zero energy modes. A consistent mass matrix formulation is adopted. The Newmark direct integration scheme is used to solve the governing equilibrium equations. The parametric effects of plate aspect ratio, length to thickness ratio, boundary conditions and lamination scheme on the transient response are investigated. The present results are in very close agreement with earlier published results in the literature and can serve as a benchmark for future investigators.
机译：通过使用Reddy高阶理论的改进形式的两个新的C〜0四和九节点有限元公式，研究了正交各向异性层状复合夹心板的瞬态响应。这种改进的三阶理论考虑了横向剪切应力的抛物线变化，并且不需要剪切校正因子。假定的应变方法用于对薄板和厚板进行建模，而没有任何重大缺陷，如剪切锁定和寄生杂散零能量模式。采用一致的质量矩阵公式。 Newmark直接积分方案用于求解控制平衡方程。研究了板高宽比，长宽比，边界条件和层压方案对瞬态响应的参数影响。目前的结果与文献中较早发表的结果非常吻合，可以作为未来研究者的基准。

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