Huang Yizhe, Zhang Huizhen, Fan Qiyuan, Huang Qibai, Shao Lefei, Zhan Xin, Wang Jun
Hubei Key Laboratory of Modern Manufacturing Quality Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China.
State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
Materials (Basel). 2024 Aug 16;17(16):4076. doi: 10.3390/ma17164076.
Shock absorbers are essential in enhancing vehicle ride comfort by mitigating vibrations. However, traditional rubber shock absorbers are constrained by their fixed stiffness and damping properties, limiting their adaptability to varying loads and thus affecting the ride comfort, especially under extreme road conditions. Shape Memory Alloys (SMAs), known for their intelligent material properties, offer a unique solution by adjusting stiffness and damping in response to temperature changes or strain rates, making them ideal for advanced vibration control applications. This study builds upon the Auricchio constitutive model to propose an enhanced SMA hyper-elastic constitutive model that accounts for different loading rates. This new model elucidates the impact of loading rates on the stiffness and damping characteristics of SMAs. Additionally, we introduce an innovative circular rubber-based SMA composite vibration reduction structure. Through a parameterized model and finite element simulation, we comprehensively analyze the stiffness and damping properties of the composite damper under various loading rates and harmonic excitations. Our findings suggest a novel approach to improving the vehicle ride comfort, offering significant potential for engineering applications and practical value.
减震器对于通过减轻振动来提高车辆行驶舒适性至关重要。然而，传统橡胶减震器受其固定的刚度和阻尼特性限制，限制了它们对变化载荷的适应性，从而影响行驶舒适性，尤其是在极端路况下。形状记忆合金（SMA）以其智能材料特性而闻名，通过响应温度变化或应变率来调整刚度和阻尼，提供了一种独特的解决方案，使其非常适合先进的振动控制应用。本研究基于奥里基奥本构模型，提出了一种考虑不同加载速率的增强型SMA超弹性本构模型。这个新模型阐明了加载速率对SMA刚度和阻尼特性的影响。此外，我们还引入了一种创新的基于圆形橡胶的SMA复合减振结构。通过参数化模型和有限元模拟，我们全面分析了复合阻尼器在各种加载速率和谐波激励下的刚度和阻尼特性。我们的研究结果提出了一种提高车辆行驶舒适性的新方法，具有显著的工程应用潜力和实际价值。
