当前位置:首页>南京>【EML最新研究论文】南京工业大学任鑫课题组:弯曲主导的三维手性热旋转超材料

【EML最新研究论文】南京工业大学任鑫课题组:弯曲主导的三维手性热旋转超材料

  • 2026-04-16 04:19:58
【EML最新研究论文】南京工业大学任鑫课题组:弯曲主导的三维手性热旋转超材料
非常规热响应超材料在温度变化下能够展现出超常的变形性能,如负、零和超大热膨胀,在高精度仪器、航空航天等热变形影响较大的领域具有广阔应用前景。然而,目前的热响应超材料的热变形仍局限于正交方向的膨胀和收缩,难以实现类似于压缩扭转的转动或扭转变形。
近日,南京工业大学任鑫教授课题组在最新一期Extreme Mechanics Letters上发表论文在经典的手性压扭超材料胞元基础上,将手性肋条替换为高敏热双金属条,实现了热扭转与热收缩耦合的热变形,突破了材料仅在单一方向膨胀或收缩变形的性能边界。
1a)为高敏热双金属在温度由室温加至300℃时的弯曲角度变化,展现了较好的热变形的可设计性。作者在前期的研究工作(Science Advances, 2024, 10, eads0892),已证明了该双金属片拥有良好的变形能力、驱动能力、响应速度和温度变形范围。图1b)为本文中热响应三维手性超材料的构造,其中手性胞元的设计借鉴了2017Frenzel等在《Science》发表的压扭超材料结构。作者们将手性肋条替换为热双金属条,尝试验证在温度变化下该超材料能否展现出图1c)中的扭转行为。

1:三维温度响应超材料设计概念:(a)热双金属材料变形测试;(b)三维超材料设计步骤;(c)热扭转变形示意图

作者们通过装配的方法制备了所提出的超材料结构,并采用油浴加热开展了温度试验,以验证该超材料在升温过程中,是否能够产生扭转或旋转的效应。图2为试验结果,其油浴温度从25℃逐渐增大到227℃。从图2a)的局部变形图可以发现,该超材料产生了明显的扭转行为。图2c)记录了该结构俯视下的变形图,并给出了对应的扭转角度。结果表明,该超材料实现了2.7°的角度变化。

2超材料的油浴试验变形过程:(a)局部放大图;(b)正视图下的结构变形;(c)俯视图下的结构变形

为了进一步定量分析胞元数量对扭转/旋转行为的影响,作者们通过有限元仿真分析了胞元数量分别为1×1…6×66组立方体超材料,在200℃温度变化下的变形行为。图3a)为六组结构的模型示意图,图3b)为升温后立方体超材料的位移和应力分布情况。结果表明,随着胞元阵列数量的增加,超材料的转动角度逐渐降低,最终可以稳定在5.4°。

3阵列的胞元数量对超材料变形的影响a)不同胞元数量的超材料模型;(b)六组超材料在200℃温度增量下的变形

4a)和(b)进一步分析了边界条件约束对转动效应的影响。设计了两种不同的边界约束,经过仿真和试验发现,所研究的超材料变形主要由顶面和底面的相对扭转、以及结构整体的转动两部分构成。此外,作者们研究了手性肋条相对长度对转动角度的影响。图4c)的结果表明,随着双金属条相对长度的增加,超材料结构的转动角度逐渐趋近于14°。

4超材料结构变形分析:(a)两种不同边界条件对转动效应的影响;(b)扭转和扭转、旋转的耦合效应;(c)双金属条的相对长度对转动角度的影响

相关工作以“Thermal rotation behavior of 3D bimaterial bending-dominated chiral metamaterials”为题发表于最新一期的Extreme Mechanics Letters》,南京工业大学博士研究生张毅为第一作者,任鑫教授为通讯作者。

作者简介

任鑫,男,致公党党员,1988年生,博士,南京工业大学教授,博导,系主任。爱思唯尔中国高被引学者、全国超材料优秀青年学者、江苏省优秀青年基金获得者、江苏省333人才培养对象、江苏省青蓝工程骨干教师、南京市中青年拔尖人才、全球前2% 顶尖科学家。主要从事新型材料与结构、复合材料、结构工程、拓扑结构优化等方面的研究。作为负责人共主持包括国家自然科学基金面上项目、国家自然科学基金青年项目在内的纵向项目12项。共发表高水平论文一百余篇,其中以第一/通讯作者发表包括Science子刊Science Advances、自然指数期刊Advanced Functional Materials在内的Q1SCI论文70余篇,“ESI高被引论文”十篇,单篇最高被引一千余次,论文总被引八千余次(谷歌学术),H指数49。授权国家发明专利8项、PCT国际专利3项、软件著作权1项。兼任中国土木工程学会先进工程材料分会理事、中国材料研究学会超材料分会理事、中国地震学会基础设施工程防灾减灾专业委员会委员等职。

张毅,男,南京工业大学2024级博士研究生,主要从事力学超材料、智能材料与结构等方面的研究。以第一作者发表包括Science子刊Science Advances、自然指数期刊Advanced Functional Materials在内的Q1SCI论文9篇,曾入选中国科协青年科技人才培育工程博士生专项计划、全球前2%顶尖科学家榜单,获研究生国家奖学金、江苏省优秀学术硕士学位论文、江苏省力学学会科学技术一等奖等荣誉,受邀担任Compos. Part B-EngInt. J. Mech. Sci.Eng. Struct.等权威期刊审稿人。

论文链接https://doi.org/10.1016/j.eml.2026.102453

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  1. CONNECT:[ UseTime:0.001141s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001441s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.006203s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000662s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001402s ]
  6. SELECT * FROM `set` [ RunTime:0.000629s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001682s ]
  8. SELECT * FROM `article` WHERE `id` = 530311 LIMIT 1 [ RunTime:0.001021s ]
  9. UPDATE `article` SET `lasttime` = 1776712252 WHERE `id` = 530311 [ RunTime:0.015095s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000865s ]
  11. SELECT * FROM `article` WHERE `id` < 530311 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001965s ]
  12. SELECT * FROM `article` WHERE `id` > 530311 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001214s ]
  13. SELECT * FROM `article` WHERE `id` < 530311 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002341s ]
  14. SELECT * FROM `article` WHERE `id` < 530311 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001828s ]
  15. SELECT * FROM `article` WHERE `id` < 530311 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002340s ]
0.217036s