Hang Shu has successfully defended his doctoral dissertation on “Impulse-Induced Nonlinear Dynamics of Flexible Mechanical Metamaterials,” under the guidance of Jordan R. Raney, Associate Professor in Mechanical Engineering and Applied Mechanics (MEAM).
Shu’s work explored mechanical metamaterials—artificially designed structures with unique properties determined by their internal structure. By investigating nonlinear dynamics, the research expanded understanding of how these materials can transform engineering design across deployable structures, reconfigurable robots, and advanced mechanical systems.
The dissertation focused on three key areas: triggering phase transitions through soliton collisions in rotating square structures, exploring energy propagation in flexible Kagome lattices, and developing a bio-inspired pulse-driven platform for motion control. These studies revealed complex dynamical behaviors, demonstrating how mechanical metamaterials can preserve or disrupt topological modes under nonlinear loading.
Personal Reflections
Reflecting on his PhD journey in MEAM, Shu shares, “MEAM provides a very collaborative and inclusive environment that fosters connections between students both academically and socially.” These connections became crucial, helping him develop strong friendships that supported learning and personal growth.
One of the most memorable moments for Shu was “[seeing] a sample successfully being fabricated or an experiment worked out. Having spent tons of time trying different things, the moments seeing them work out brought me the sense of achievement that made everything worth it.”
Conference travels added another layer of excitement. “I enjoyed talking to different people about potential ideas and collaboration,” he recalled, highlighting the program’s emphasis on broader scientific dialogue.
Future Plans and Advice
Shu’s next chapter begins at Dow Chemicals in Michigan, where he’ll work as a senior research specialist in Research & Development, focusing on mechanical and process science.
For those considering a Ph.D. at MEAM, Shu offers this advice: “First, find passion and motivation for the projects that interest you. Explore these interests early on and be prepared to learn many different things. Communication is also critical—with your advisor, colleagues, and faculty—to receive feedback and seek collaborative opportunities.”
Acknowledgments
Shu expresses deep gratitude to those who influenced and inspired him, and assisted in his personal and professional growth. “Dr. Jiakun Liu, Dr. Qiguang He, Dr. A.B.M. Haque and Dr. Weijian Jiao for their mentorship and friendship both inside and outside lab. I was fortunate enough to spend some of my most unforgettable years at Penn with them and thank you for filling this journey with so many great memories. I would like to especially thank Dr. Hiromi Yasuda, Dr. Chengyang Mo and Dr. Weijian Jiao for teaching me attitude, skills and expertise to start my PhD path. I am also fortunate to have worked alongside my lab mates: Xiaoheng Zhu, Yucong Hua, Samuele Ferracin, Dengge Jin, Damilola Lawal, and Saheli Patel, whose dedication to research and collaborative spirit made every step of this journey more meaningful. To my parents, Hai Shu and Yunying Zhu, and family members, thank you for your unwavering love and support, which has been my constant source of strength.”