Tootfinder

Corner Topology Makes Woven Baskets into Stiff, yet Resilient Metamaterials
Guowei Wayne Tu, Evgueni T. Filipov
https://arxiv.org/abs/2506.18197 https://…

Corner Topology Makes Woven Baskets into Stiff, yet Resilient Metamaterials
Basket weaving is a traditional craft used to create practical three-dimensional (3D) structures. While the geometry and aesthetics of baskets have received considerable attention, the underlying mechanics and modern engineering potential remain underexplored. This work shows that 3D woven structures offer similar stiffness yet substantially higher resilience than their non-woven continuous counterparts. We explore corner topologies that serve as building blocks to convert 2D woven sheets into …

Discrete vortex-based broadcast mode analysis for modification of dynamic stall
Het D. Patel (Department of Mechanical and Aerospace Engineering, North Carolina State University), Yi Tsung Lee (Department of Mechanical and Aerospace Engineering, North Carolina State University), Ashok Gopalarathnam (Department of Mechanical and Aerospace Engineering, North Carolina State University), Chi-An Yeh (Department of Mechanical and Aerospace Engineering, North Carolina State University)

Discrete vortex-based broadcast mode analysis for modification of dynamic stall
We integrate a discrete vortex method with complex network analysis to strategize dynamic stall mitigation over a pitching airfoil with active flow control. The objective is to inform actuator placement and timing to introduce control inputs during the transient evolution of dynamic stall. To this end, we represent the massively separated flow as a network of discrete vortical elements and quantify the interactions among these vortical nodes by tracking the spread of displacement perturbations …

Clustering and emergent hyperuniformity by breaking microswimmer shape and actuation symmetries
Anson G. Thambi, William E. Uspal
https://arxiv.org/abs/2506.12293

Clustering and emergent hyperuniformity by breaking microswimmer shape and actuation symmetries
Hydrodynamic interactions driven by particle activity are ubiquitous in active colloidal systems. Although these interactions are strongly influenced by the interfacial actuation mechanism and geometry of the swimming particles, theoretical understanding of how these microscopic design parameters govern collective dynamics remains limited. Here, we investigate the collective dynamics of oblate spheroidal microswimmers. Using an approximate kinetic theory and corroborating boundary element metho…

2D PZT MEMS Resonant Scanner Using a Three-Mask Process
Mehrdad Khodapanahandeh, Parviz Zolfaghari, Hakan Urey
https://arxiv.org/abs/2505.24566 https://

2D PZT MEMS Resonant Scanner Using a Three-Mask Process
This work presents the design, simulation, fabrication, and characterization of a novel architectural compact two-dimensional (2D) resonant MEMS scanning mirror actuated by thin-film lead zirconate titanate (PZT). The device employs an innovative mechanically coupled dual-axis architecture fabricated using a three-mask process on an SOI-PZT deposited wafer, significantly reducing system complexity while achieving high performance. The scanner integrates a 1 $\times$ 1.4 mm oval mirror within a …