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Nonlinear low-velocity impact of graphene platelets reinforced metal foams cylindrical shell: Effect of spinning motion and initial geometric imperfections
Aerospace Science and Technology ( IF 5.0 ) Pub Date : 2023-06-09 , DOI: 10.1016/j.ast.2023.108435
Hao-Xuan Ding , M.A. Eltaher , Gui-Lin She

A nonlinear analysis is presented for low-velocity impact behavior of a graphene platelets-reinforced metal foams (GPLRMF) cylindrical shell with spinning motion in thermal environment, in which the initial geometric imperfection is incorporated. Taking three different graphene platelets (GPLs) distribution patterns into account, the GPLs reinforcement is either uniformly-distributed or functionally-graded along the shell thickness direction. The temperature-dependent micromechanical model is applied to estimate the material properties of GPLs reinforced composites. The nonlinear Donnell thin shell theory is utilized to derive the motion equations, in which von Kármán-type of kinematic nonlinearity is included. The influences of geometrical imperfections, spinning velocity, different boundary conditions, GPLs distribution patterns, foam distribution types, foam coefficient, GPLs weight fraction, temperature changes, the impactor' radius and initial velocity, prestressing force and damping coefficient on the low-velocity impact problems are discussed using the Runge-Kutta method in detail.



中文翻译:

石墨烯片增强金属泡沫圆柱壳的非线性低速冲击:旋转运动和初始几何缺陷的影响

对石墨烯薄片增强金属泡沫(GPLRMF) 圆柱壳在热环境中的低速冲击行为进行了非线性分析,其中初始几何缺陷被合并。考虑到三种不同的石墨烯片晶 (GPLs) 分布模式,GPLs 增强材料沿壳厚度方向均匀分布或功能分级。应用与温度相关的微机械模型来估计 GPL 增强复合材料的材料特性。利用非线性Donnell 薄壳理论推导运动方程,其中包含von Kármán 型运动学非线性。几何缺陷、纺丝速度、不同边界条件、GPLs分布模式、泡沫分布类型、泡沫系数、GPLs重量分数、温度变化、冲击器半径和初始速度的影响, 预应力和阻尼系数在低速冲击问题上的应用详细讨论了Runge-Kutta 方法。

更新日期:2023-06-09
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