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Related Concept Videos

Bending of Members Made of Several Materials01:11

Bending of Members Made of Several Materials

In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Hooke's Law01:26

Hooke's Law

Hooke's law, a pivotal principle in material science, establishes that the strain a material undergoes is directly proportional to the applied stress, defined by a factor called the modulus of elasticity or Young's modulus.

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Updated: Jun 25, 2026

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
09:39

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

Nonlocal Metaspire: A Scalable Elastic Material Platform With Decoupled Mechanical Modes.

Seung Han Kim1, Myung Hwan Bae2, Ye Jeong Shin1

  • 1Department of Mechanical Engineering, Seoul National University, Seoul, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|June 23, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a scalable elastic nonlocal metamaterial platform using the Metaspire architecture. This innovation enables advanced wave control by overcoming limitations in scalability and mode coupling for novel wave devices.

Keywords:
beyond‐nearest‐neighbor couplingelastic wavesmode decouplingnonlocal metamaterialsprogrammable dispersionroton‐like dispersionssequential rotation

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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy
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Area of Science:

  • Physics
  • Materials Science
  • Wave Phenomena

Background:

  • Nonlocal metamaterials offer unique wave control via extraordinary band structures.
  • Existing elastic nonlocal metamaterials face scalability and mode coupling challenges.
  • These limitations hinder the development of advanced wave control systems.

Purpose of the Study:

  • To propose a novel, scalable material platform for elastic nonlocal metamaterials.
  • To investigate wave motions and the role of symmetry in flexural band behavior.
  • To overcome scalability and mode coupling limitations in elastic metamaterials.

Main Methods:

  • Development of the "Metaspire" architecture with sequential rotation.
  • Detailed investigation of wave motions around maxon and roton points.
  • Experimental fabrication and validation of the proposed metamaterial platform.

Main Results:

  • Demonstrated high scalability of the proposed elastic nonlocal metamaterial platform.
  • Successfully suppressed mode coupling, enabling clearer wave phenomenon investigation.
  • Validated the Metaspire architecture's effectiveness through fabrication and experiments.

Conclusions:

  • The proposed Metaspire architecture provides a scalable solution for elastic nonlocal metamaterials.
  • This platform facilitates the study of unique nonlocal wave phenomena by mitigating mode coupling.
  • Enables the development of multifunctional wave platforms for new wave systems and devices.