基于贝齐尔曲线的机械超材料的反向设计,具有可编程的负热膨胀和负波桑比率,通过数据增强的深度自动编码器
Min Woo Cho1, Keon Ko1, Majid Mohammadhosseinzadeh1
1School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 Beon-Gil, Geumjeong-gu, Busan, 46241, South Korea. sangmin.park@pusan.ac.kr.
Materials horizons
|May 7, 2024
概括
我们开发了可编程的性机械超材料 (BPCM) 和深度自编码器反向设计模型 (DAIM),用于精确控制应力和变形. 这种方法显著提高了负热膨胀和负波桑波桑的设计精度.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算设计的计算设计.
背景情况:
- 机械超材料 (MM) 通过负热膨胀 (NTE) 和负波桑比率 (NPR) 来控制应力和变形.
- 随意NTE和NPR的MM的反向设计是具有挑战性的,因为传统的分析和数值方法的局限性.
研究的目的:
- 为先进的热机械控制提出基于贝齐尔曲线的可编程合力机械元材料 (BPCM).
- 开发基于深度自编码器的反向设计模型 (DAIM) 以实现BPCM的高效和准确的反向设计.
主要方法:
- 利用Bézier曲线用于BPCM设计和基于深度自编码器的反向设计模型 (DAIM).
- 采用代转移学习与数据增强,以提高数据稀疏领域的DAIM性能.
- 通过3D打印和实验测试验证了设计的BPCM.
主要成果:
- 在数据稀疏的地区,DAIM实现了NTE (79.25%) 和NPR (83.33%) 的平均绝对误差的显著降低.
- 成功设计的BPCM具有NTE范围从-1100到0ppmK-1和NPR从-0.6到-0.1.1.
- 通过结合各种反向设计的BPCM单元电池,证明了可编程的热变形模式.
结论:
- 拟议的BPCM和DAIM框架允许精确反向设计具有可调节热力学特性的元材料.
- 这种方法通过调节热机械刺激来提高高精度系统的机械强度.
- 开发的方法为创建具有所需功能的复杂超材料结构提供了一条途径.
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