报告题目
Symmetry-guided design of mechanical metamaterials: from origami folding to backscattering-free edge waves
主讲人
Dr. Nan Cheng（University of Michigan, Ann Arbor）
报告时间
2026年9月21日（星期一）14:30-16:00
报告地点
浙江大学紫金港校区·安中大楼A418
报告摘要
Mechanical metamaterials achieve unusual deformation and wave responses through architecture, and a central challenge is to identify design principles that remain useful across very different functions. In this talk, I will show how symmetry can potentially provide such a framework through two examples. First, for periodic triangulated origami, I will present a layer-group classification of symmetry-protected linear folding modes and show how symmetry and topology determine whether finite-amplitude folding can remain free of global curvature [manuscript in preparation, to be posted on arXiv soon]. This yields design rules for deployable origami, including over-constrained structures. Second, I will show how an emergent conformal symmetry in two-dimensional auxetic media produces spin–momentum-locked edge waves, enabling passive, linear, backscattering-free transport at very low frequencies without relying on a band gap [Nat. Commun.16, 2373 (2025)]. Together, these results illustrate how symmetry can generate predictive design principles for desired mechanical functions.
主讲人简介
Dr. Nan Cheng is an incoming researcher at Bohr & Plank lab in Huawei. He received B.S with honor in physics from Fudan University in 2019 and Ph.D. in physics from University of Michigan, Ann Arbor in 2025. His research mainly focuses on the design of mechanical metamaterials, mathematical physics, self-assembly problems. Recently, he also holds interests in statistical physics and quantum error correction.
承办单位
浙江省岩土力学与工程学会交通岩土工程专业委员会、浙江省力学学会岩土力学与工程专业委员会、浙江省岩土力学与工程学会本构理论与数值分析专业委员会、浙江大学岩土工程计算中心、浙江省土木建筑学会土力学与岩土工程学术委员会