V-型皱褶芯材承压的均质化等效模型

基金项目: 江苏省普通高校研究生科研创新计划（KYLX_0298）；江苏高校优势学科建设工程基金

详细信息

Homogenized equivalent model of V-type folded core under compression

Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 采用代理模型获得V-型皱褶芯材等效屈服应力、等效平台应力和几何参数之间的关系，并据此提出了一种承受静力/准静力面外压缩的V-型皱褶芯材均质化等效模型。计算结果与试验结果的对比表明：皱褶芯材的均质化等效模型可以很好地模拟原结构的弹塑性力学特性，并能大大减少计算耗时。对于皱褶夹芯板在结构中，特别是抗坠毁吸能结构中的应用，本文的等效模型提供了一种高效率的计算及优化手段。
- 皱褶夹芯板 /
- 等效模型 /
- 有限元分析 /
- 代理模型 /
- 刚度折减
Abstract: The equivalent elasticity modulus, equivalent yield strain and equivalent plate stress of V-type folded core could be got using surrogate models. Based on the surrogate model, a homogenized equivalent model of V-type folded core under static/quasi-static compression was set up. The calculation results show that the mechanical properties of the original structure are simulated well by the homogenized equivalent model, and the computing cost is greatly reduced. The equivalent model in this paper provides an efficient way to calculate or optimize the property of folded core applied in structures, especially in anti-crash and energy absorbing structures.
- folded core sandwich panel /
- equivalent model /
- finite element analysis /
- surrogate models /
- stiffness reduction