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首页> 外文会议>Asian Pacific Conference on Fracture and Strength >Transient Dynamic Response of Delaminated Composite Twisted Cylindrical Shells subjected to Low Velocity Impact
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Transient Dynamic Response of Delaminated Composite Twisted Cylindrical Shells subjected to Low Velocity Impact

机译：低速冲击的分层复合扭曲圆柱壳的瞬态动力响应

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摘要

In this paper a transient dynamic finite element analysis is presented to study the response of centrally impacted delaminated composite pretwisted cylindrical shells. An eight noded isoparametric plate bending element is employed in the finite element formulation. Effects of transverse shear deformation and rotary inertia are included. To satisfy the compatibility of deformation and equilibrium of resultant forces and moments at the delamination crack front a multipoint constraint algorithm is incorporated. The modified Hertzian contact law which accounts for permanent indentation is utilized to compute the contact force, and the time dependent equations are solved by Newmark's time integration algorithm. Parametric studies are performed in respect of relative size of delamination and angle of twist for graphite-epoxy composite cylindrical shallow shells subjected to low velocity normal impact.
机译：本文提出了一种瞬态动态有限元分析，研究了中央撞击分层复合材料预防圆柱壳的响应。在有限元制剂中采用八个点开的异戊酰胺板弯曲元件。包括横向剪切变形和旋转惯性的影响。为了满足所得力的变形和平衡的兼容性和分层裂缝前沿的矩的恰当地结合了多点约束算法。用于将永久性压痕的修改的赫斯琴联系法用于计算接触力，并通过纽马克的时间集成算法来解决时间依赖方程。参数研究是关于分层的相对尺寸和石墨 - 环氧复合圆柱形浅壳的相对尺寸，经受低速正常冲击的浅壳。

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