形状记忆合金应用于汽车适应性空气动力学
Miriam Battaglia1, Andrea Sellitto1, Angela Giamundo2
1Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa, Italy.
Materials (Basel, Switzerland)
|July 14, 2023
概括
本研究介绍了形状记忆合金 (SMA) 的数值模型,以模拟它们的热力学行为. 该模型能够准确地模拟复杂的SMA组件,证明它们在工程应用中的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 形状记忆合金 (SMA) 具有独特的热力学特性,推动它们在汽车和航空航天领域的采用日益增加.
- 精确模拟SMA行为对于设计复杂的组件和系统至关重要.
- 现有的模型可能无法完全捕捉SMA在各种条件下的复杂热力学反应.
研究的目的:
- 开发和数量实现一个全面的构成模型来模拟形状记忆合金的热力学行为.
- 将此模型作为用户子程序集成到Abaqus/标准有限元素代码中.
- 验证模型在预测基于SMA系统的性能方面的能力.
主要方法:
- 开发了一个构成模型,利用温度和应变作为控制变量来捕捉形状记忆和超弹性效应.
- 该模型作为一个用户子程序 (UMAT) 实现了Abaqus/标准有限元分析.
- 使用带有SMA弹的可变执行器的滑板系统被设计和模拟以证明该模型的应用.
主要成果:
- 数字实现成功模拟了SMA的热力学行为,并考虑了材料性质的变化.
- 滑板系统模拟显示了通过SMA状态变化,由温度分布驱动的有效负载生成.
- 成功评估了执行器在切换配置和保持稳定的性能.
结论:
- 拟议的综合构成模型为模拟形状记忆合金的热力学行为提供了强大的工具.
- 在Abaqus/Standard中成功实施允许分析包含SMA的复杂组件和系统.
- 该研究证实了SMA在先进工程应用中的巨大潜力,特别是与精确的模拟技术相结合时.
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