本文对浸入流体中的功能梯度 (FG) 石墨烯折纸 (GOri) 拉胀超材料 (GOEAM) 锥形梁的非线性自由振动和后屈曲行为进行了数值研究，特别关注负泊松比 (NPR) 的影响）关于非线性频率和后屈曲平衡路径。 新型 GOEAM 的超材料特性由基于物理嵌入式机器学习的微力学模型决定。 梁变形由 Timoshenko 梁理论和 von Kármán 非线性控制，并使用微分求积法 (DQM) 求解控制方程。 使用速度势函数和伯努利方程计算施加在梁表面上的流体压力。 综合参数研究表明，由于使用了 …

2023年10月1日 · Effect of negative poisson's ratio on nonlinear free vibration and postbuckling behaviour of FG-GOEAM beam is investigated in detail. Metamaterial properties of GOEAM are determined by physics-embedded machine learning assisted micromechanics model. FG-GOEAM beam greatly outperforms its pristine metallic counterpart due to GOri reinforcement.

本文研究了功能梯度 (FG) 石墨烯折纸 (GOri) 启用的拉胀金属超材料 (GOEAM) 梁的屈曲和后屈曲特性。 该梁由多个 GOEAM 层组成，其中 GOri 含量以分层模式变化，以通过梁厚度实现梯度变化的泊松比和刚度系数。 每个 GOEAM 层的材料特性由遗传编程 (GP) 辅助微机械模型估计。 采用一阶剪切变形理论和 von Kármán 型非线性来推导通过微分求积法 (DQM) 数值求解的非线性控制方程。 数值研究主要集中在 GOri 含量、分布模式、折叠程度和温度对 FG 超材料梁的屈曲和 …

2025年1月13日 · Functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterials (FG-GOEAM) have received much attention due to their excellent mechanical properties. In this study, the buckling and free vibration behaviours of FG-GOEAM beams supported by elastic foundations in a thermal environment are investigated.

2022年12月1日 · Functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) structures have shown great potential for various engineering applications due to their exceptional mechanical and physical properties such as high strength-to-weight ratio, tuneable stiffness and strength, and negative Poisson's ratio (NPR).

2024年4月1日 · The novel machine learning model can accurately and efficiently predict the vibrational characteristics of FG-GOEAM beams. Fluid viscosity and density provide a damping effect on the natural frequency and restrains beam deflection.

Functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) structures have shown great potential for various engineering applications due to their exceptional mechanical and physical properties such as high strength-to-weight ratio, tuneable stiffness and strength, and negative Poisson's ratio (NPR).

2024年2月1日 · 本文研究了浸没在牛顿流体中的功能梯度石墨烯折纸拉胀超材料 (fg-goeam) 梁的自由和受迫振动行为，特别关注负泊松比 (npr) 对固有频率的影响和梁的动态响应。

2024年4月7日 · goeam has one repository available. Follow their code on GitHub.

2023年6月3日 · Functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) structures have shown great potential for various engineering applications due to their...