Mechanical Metamaterials
Architected materials with mechanical properties derived from structure rather than composition.
Bio-inspired re-entrant honeycomb metamaterial with programmable dual-plateau mechanical response
A bio-inspired re-entrant honeycomb mechanical metamaterial is described as having a programmable dual-plateau mechanical response.
A Review of Machine Learning Applications in Mechanical Metamaterial Design
The review summarizes how machine learning models and end-to-end workflows can accelerate mechanical metamaterial design and property prediction using simulation-based validation.
Heat breaks the rules at the nanoscale and scientists used it to their advantage
Nanoscale gold metamaterials can boost heat transfer across tiny gaps by up to 4×, enabling more efficient thermal management and precision heat engineering.
In Situ Scanning Electron Microscopy Investigation of Flexural and Interlaminar Failure Mechanisms in Carbon Nanotube‐Reinforced Shape Memory Polymer Composites
In situ SEM shows that CNT-reinforced shape memory polymer composites fail via distinct, architecture-dependent mechanisms, with buckypaper interleaves improving Mode II interlaminar fracture toughness.
Hydrogel-based flexible metamaterial for underwater acoustic carpet cloaking
A hydrogel-based flexible metamaterial is proposed for underwater acoustic carpet cloaking.
Multimaterial 4D printing of adaptive and reconfigurable auxetic metastructures
Multimaterial 4D printing with PLA/PCL enables auxetic metastructures whose geometry–material coupling yields tunable mechanics, energy absorption, and thermally induced reconfigurability.
Additively manufactured Shape Memory Alloy Hybrid Composites with a polymer matrix featuring a re-entrant honeycomb structure
A fully additive SLA+TFP route fabricates SMA hybrid composites with a re-entrant honeycomb polymer structure, enabling geometry-tuned, thermally activated out-of-plane bending with improved reproducibility via automated SMA placement.
Thermomechanical Modelling and Shape Prediction in 4D Printing Using FEA
A thermomechanical FEA approach is used to simulate and plan shape morphing in 4D-printed two-layer and more complex structures.
Reprogrammable metamaterial robot with embodied versatile computation and mechanical intelligence
A reprogrammable metamaterial robot is presented as combining versatile computation with mechanical intelligence.
Real-time reprogrammable snapping mechanical metamaterial with nonlinear force-displacement responses
A real-time reprogrammable snapping mechanical metamaterial is reported to exhibit nonlinear force–displacement responses.
Optimal Design of an Acoustic Lens with Anisotropic Metamaterial
By optimizing the sizes of random rigid scatterers in an anisotropic acoustic metamaterial, the lens achieves subwavelength focusing beyond the diffraction limit.
A auxetic metamaterial structure: analysis of shear and bending, mechanical characterization
Auxetic (negative Poisson’s ratio) re-entrant unit-cell designs integrated into bone screws improved load-bearing capacity and deformation resistance under shear and bending versus conventional screws.
Invisible design and acoustic scattering of metamaterial plates with active feedback control
Active feedback-controlled metamaterial plates are designed to reduce low-frequency acoustic scattering by tuning dynamic effective density, enabling “invisible” behavior for underwater vehicles.
Thin Acoustic-Composite Structures With Metamaterial Inclusions for Enhanced Low-Frequency Sound Absorption
Thin porous acoustic composites with tunable labyrinthine metamaterial inclusions achieve enhanced low-frequency absorption via multiresonant behavior confirmed by acoustic tests.
A topology-optimized ultrastiff mechanical metamaterial exhibiting stiffness beyond Hashin-Shtrikman upper bound
A topology-optimized mechanical metamaterial is reported to achieve ultrahigh stiffness beyond the Hashin–Shtrikman upper bound.
Transmission loss of a labyrinthine acoustic metamaterial augmented with multichannel feedforward active noise control
A labyrinthine acoustic metamaterial is augmented with multichannel feedforward active noise control to improve transmission loss.
Design and development of one-dimensional acoustic bundle ventilated metamaterial
A one-dimensional kink-fiber acoustic meta-structured blanket is proposed and validated to enable broadband sound absorption while permitting airflow through the structure.
Thermoelastic wave-based logic for mechanically cognitive materials
Wave-scattering mechanical logic gates are built from metamaterial cells with shape-memory-alloy mechanical memory that reconfigures via thermal activation, demonstrated with measured wavefields.
Duct Metamaterial Muffler with Composite Acoustic Porous Media: Acoustic Optimization via Periodic Arrangement, Particle Swarm Optimization and Experimental Validation
A composite acoustic porous duct metamaterial muffler with periodic tortuous channels and optimized porous layers achieves improved broadband transmission loss validated by experiments.
4D printing for crack trapping and adaptive damage-tolerant structures
A review synthesizes how 4D printing can enable crack trapping and damage-tolerant behavior through smart, metamaterial-based self-sensing and time-dependent shape change.
Ultra-broadband acoustic metamaterial lens for loudspeaker directivity control
An ultra-broadband acoustic metamaterial lens enables passive loudspeaker directivity control across wide frequency ranges.
A postbuckling-based metamaterial for switching the propagation of surface acoustic waves
A postbuckling-based elastic-beam metamaterial can switch surface acoustic wave propagation by toggling between a bandgap (OFF) and bandgap elimination via buckling (ON), using only mechanical effects.
Acoustic metamaterial in low-frequency underwater noise mitigation
A lightweight, 3-D-printed acoustic metamaterial is proposed and lab-tested to attenuate wide-band low-frequency underwater noise via sound insulation.
Metamaterial acoustic barriers for traffic noise control in urban zones
Geometrically periodic acoustic metamaterial barriers, tested at 1:10 scale, can reduce traffic noise, with porous polyethylene layers improving absorption over a wide frequency range.