来源:科学网 发布时间:2024/4/12 15:23:51
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加州大学伯克利分校教授讲述智能超材料: 组合拓扑结构、材料和功能

直播时间:2024年4月12日(周五)20:00-21:30

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北京时间2024年4月12日晚八点,iCANX Talks 第181期邀请到了加州大学伯克利分校Xiaoyu (Rayne) Zheng教授进行分享!此外,电子科技大学Yi Zhang、北京工业大学Pan Rui等教授担任嘉宾,加州大学洛杉矶分校Hanxiang Wu博士作为挑战者,北京大学Haixia Zhang教授担任主持人。

这将是一场汇聚顶尖学者的盛会,共同探讨前沿科技与学术挑战!更多精彩,敬请期待!

【嘉宾介绍】

Xiaoyu (Rayne) Zheng

加州大学伯克利分校

Intelligent Metamaterials: Assembling Topologies, Materials and Functionalities

【Abstract】

Abstract Additive manufacturing has shown the promise of freedom of designs, enabling parts customization and tailorable properties where superior structural performances can be achieved by a fraction of weight density compared to bulk material. However, it is presently difficult to directly print different materials (structural, dielectric, conducting and ferroelectrics) to create a complex device with multiple functionalities that responds to multiple stimuli (sound, electrical, mechanical, etc.). Unlike biological systems where functions, including sensing, actuation, and control, are closely integrated, few materials have comparable system complexity.

In this talk, I will present a suite of new multi-material additive manufacturing processes and design methodologies to create materials with prescribed structural and functional behaviors. The structural materials consist of a network of micro-unit cells which collectively influence new mechanical behaviors (from high-strength, lightweight to toughening) not seen in their native counterpart. When combined with an electronic and functional phase, these materials turn themselves into a robot and is capable of programmed motions with self-sensing, feedback control, acoustic and electromagnetic wave steering. I will present the manufacturing and synthesis of these materials, as well as their mechanics and design methods underpinning their novel behaviors.

增材制造技术为自由设计带来了希望,使部件及其特性的定制成为可能,与大块材料相比,只需很小的重量密度就能实现卓越的结构性能。然而,目前还很难直接通过打印不同的材料(结构材料、电介质材料、导电材料和铁电材料)来制造出具有多种功能且能对多种刺激(声音、电气、机械等)做出响应的复杂装置。很少有材料系统能够与集成传感、驱动和控制等功能的生物系统相媲美。

在本讲座中,郑教授将介绍一套新的多材料增材制造工艺和设计方法,用于制造具有规定结构和功能行为的材料。结构材料由微小单元格网络组成,这些单元格共同影响着新的机械行为(从高强度、轻量化到增韧),而这些行为在原生材料中是看不到的。当与电子和功能阶段相结合时,这些材料就会变成机器人,并能通过自我感应、反馈控制、声波和电磁波转向等功能进行编程运动。郑教授将介绍这些材料的制造和合成,以及它们的力学和设计方法。

【BIOGRAPHY】

Xiaoyu “Rayne” Zheng directs the Advanced Manufacturing and Metamaterials Laboratory at University of California, Berkeley. He is also a faculty co-director at Berkeley Sensor & Actuator Center, and Jacobs Institute for Design Innovation and a faculty Scientist at Lawrence Berkeley National Laboratory. Rayne’s research focuses on creating the next-generation functional, structural, electronic and living materials by developing novel 3D printing techniques for materials with controlled topologies. He has made pioneering contributions to the programmable assembly of functional, structural, and electronic materials, printing and processing highly responsive functional materials for transducers, sensors, and robotics applications. His work on metamaterials was featured on MIT Technology Review Top 10 Innovations, LA Times, and multiple journal publications in Science Magazine and Nature Materials. Prior to his faculty career, Zheng worked as a mechanical engineer at the Lawrence Livermore National Laboratory (LLNL). He has received multiple awards, including NSF CAREER Award, DARPA Young Faculty Award, DARPA Director’s Fellowship, Office of Naval Research Young Investigator Award, Air Force Young Investigator Award, Outstanding Assistant Professor Award, 3M Faculty Award, and Freeform Fabrication and Additive Manufacturing Excellence (FAME) Award.

Xiaoyu (Rayne)Zheng 是加州大学伯克利分校先进制造与超材料实验室的主任。 他还是伯克利传感器与执行器中心、雅各布斯设计创新研究所的联合主任,以及劳伦斯伯克利国家实验室的科学家。雷恩的研究重点是通过为具有可控拓扑结构的材料开发新型三维打印技术,创造下一代功能、结构、电子和生命材料。他在功能、结构和电子材料的可编程组装、打印和加工用于传感器、感应器和机器人应用的高响应功能材料方面做出了开创性贡献。他在超材料方面的研究成果被《麻省理工学院技术评论》(MIT Technology Review)十大创新、《洛杉矶时报》(LA Times)以及《科学杂志》(Science Magazine)和《自然材料》(Nature Materials)等多家杂志刊载。在从事教师职业之前,Zheng 曾在劳伦斯利弗莫尔国家实验室(LLNL)担任机械工程师。他曾获得多个奖项,包括国家自然科学基金会 CAREER 奖、DARPA 青年教师奖、DARPA 主任奖学金、海军研究办公室青年研究员奖、空军青年研究员奖、杰出助理教授奖、3M 教员奖以及自由曲面制造和增材制造卓越奖 (FAME)。

 
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