Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Rolling Resistance

Rolling Resistance

When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...

Rolling Resistance: Problem Solving

Rolling Resistance: Problem Solving

Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.

Elasticity in Concrete

Elasticity in Concrete

Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear...

Dynamic Modulus of Elasticity of Concrete

Dynamic Modulus of Elasticity of Concrete

The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...

Dry Friction

Dry Friction

Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Evaluation of an in-vitro test protocol using a three-dimensional human buccal oral mucosal model to assess the oral medical devices.

Toxicology in vitro : an international journal published in association with BIBRA·2026

Same author

Highly sensitive detection of species-specific malaria antigens using a cellulose nanobead-based lateral flow immunoassay.

Mikrochimica acta·2026

Same author

Anti-inflammatory effects of taurocholic acid and tauroursodeoxycholic acid from rainbow trout spleen extract via NF-κB suppression.

Scientific reports·2026

Same author

Quantitative analysis of bovine angiogenin in milk using a microliter-volume protein microarray.

Talanta·2026

Same author

Lorlatinib protects dopaminergic neurons by inhibiting ALK-mediated neuroinflammation in a mouse model of Parkinson's disease.

Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie·2026

Same author

Personal PM<sub>2.5</sub> Exposure Using Time-Weighted Average Scenarios in the Seoul Metropolitan Area.

Toxics·2026

Search research articles

Related Experiment Video

Updated: Jun 26, 2025

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

Published on: January 30, 2019

TPMS-based auxetic structure for high-performance airless tires with variable stiffness depending on deformation.

Do-Yeon Kim¹, Hong-Seok Kim¹, Sarath Suresh Kamath²

¹Graduate School of Mechanical Engineering, Pusan National University, Busan, 46241, Korea.

Scientific Reports

|May 19, 2024

Summary

A new auxetic structure, based on primitive-type triply periodic minimal surfaces (P-TPMS), enhances airless tire stiffness through deformation. This novel rotated primitive-type auxetic structure (RPAS) offers improved stability and shock absorption for practical tire applications.

Keywords:

A rotated primitive-type auxetic structure (RPAS)Additive manufacturing Airless tire Auxetic spoke structure Copolymer rubber printing Triply periodic minimal surface (TPMS)

More Related Videos

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Published on: April 25, 2020

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Published on: August 17, 2018

Related Experiment Videos

Last Updated: Jun 26, 2025

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

Published on: January 30, 2019

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Published on: April 25, 2020

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Published on: August 17, 2018

Area of Science:

Materials Science
Mechanical Engineering
Computational Mechanics

Background:

Traditional airless tires face challenges with stiffness and shock absorption.
Triply Periodic Minimal Surfaces (TPMS) offer unique structural properties.
Auxetic materials exhibit counterintuitive deformation behaviors.

Purpose of the Study:

To design a novel auxetic structure for airless tire spokes.
To enhance tire stiffness and stability through controlled deformation.
To evaluate the manufacturability of the proposed auxetic structure.

Main Methods:

Design of an auxetic unit cell based on P-TPMS.
Parametric study to understand auxetic structure characteristics.
Finite element analysis and experimental validation of RPAS spokes.
Comparison with honeycomb structures.
Additive manufacturing evaluation.

Main Results:

The designed rotated primitive-type auxetic structure (RPAS) demonstrates increased stiffness under compression.
RPAS-based airless tires show more stable behavior on various terrains compared to honeycomb structures.
Variable stiffness characteristic provides enhanced shock absorption and prevents large local deformations.
Manufacturability using rubber-based additive manufacturing is confirmed.

Conclusions:

The RPAS offers a promising solution for advanced airless tire design.
Variable stiffness properties are key to improved tire performance and durability.
Additive manufacturing enables practical realization of these novel auxetic structures.