Instabilities for Dynamically Tunable Patterns and Functions of Soft Materials
讲座名称：
Instabilities for Dynamically Tunable Patterns and Functions of Soft Materials
讲座时间：
2019-04-15
讲座人：
Stephan Rudykh
形式：
校区：
兴庆校区
实践学分：
讲座内容：
讲座题目：Instabilities for Dynamically Tunable Patterns and Functions of Soft Materials
讲座时间：2019年4月15日 下午3:00
讲座地点：航天航空学院教一楼第五会议室
讲座人：Stephan Rudykh
讲座内容：
Nature actively uses sophisticated designs of microstructures to achieve astonishing material properties and functionalities. Thus, microstructures give rise to the incredible toughness of mother-of-pearl. Another example is an octopus, an amazingly effective soft machine created by the nature. The creature can squeeze its whole body through an extremely narrow space while preserving a large variety of functionalities. The nature created soft machine comprises highly deformable composites that are characterized by different dynamically tunable microstructures and phase properties, depending on the required functionalities. Indeed, such materials are highly desirable for many applications including human-interactive soft robotics, and novel actuators and sensors, and biomedical devices.
In this presentation, I will specifically focus on the role of microstructures in the overall performance of deformable multifunctional composites. We will explore the behavior of soft electroactive composites that gained the name of “artificial muscles.” These materials can undergo large deformations when excited by external electric fields, making them extremely attractive as multifunctional actuators and sensors. We will consider how large deformations and elastic instabilities can be used to trigger dramatic pattern transformations and control a large variety of functionalities. Recently discovered new type of instability-induced domain formations in soft composites will be presented.
The analytical and numerical findings, as well as the experimental results of 3D-printed composites will illustrate the ideas.
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