Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Fatigue01:21

Fatigue

794
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
794
Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

367
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...
367
Residual Stresses in Bending01:18

Residual Stresses in Bending

517
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
517
Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

2.7K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.7K
Plastic Behavior01:21

Plastic Behavior

519
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
519
Circular Shafts - Elastoplastic Materials01:24

Circular Shafts - Elastoplastic Materials

453
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
453

You might also read

Related Articles

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

Sort by
Same author

Comprehensive Benchmarking with Guidelines for Analyzing Transposable Element-derived RNA Expression.

Genomics, proteomics & bioinformatics·2026
Same author

Prediction of progressive local kyphosis following PVP/PKP for osteoporotic vertebral fractures based on the OF classification.

European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·2026
Same author

Nano-enabled spatially selective protein degradation modulates lactate metabolism to potentiate antitumor immunity in liver cancer.

Nature nanotechnology·2026
Same author

Zynq-Based Hardware-Software Codesign Architecture for an Intelligent Hyperspectral Camera.

Sensors (Basel, Switzerland)·2026
Same author

Chirped-pulse coherent pulse stacking in a Yb-doped fiber laser for high-repetition-rate electron bunch shaping.

Optics express·2026
Same author

Hypervirulent <i>Klebsiella pneumoniae</i> induces liver abscess by promoting neutrophil extracellular trap formation through NLRP3 inflammasome activation.

Microbiology spectrum·2026

Related Experiment Video

Updated: Jan 14, 2026

A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
07:15

A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli

Published on: December 11, 2014

14.2K

Thermo-Mechanically Driven Hierarchical Evolution in Polyurethane Elastomers Subjected to Compression Fatigue.

Min Wang1,2, Yushu Tian1,2, Jihang Yu1,2

  • 1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.

ACS Applied Materials & Interfaces
|October 20, 2025
PubMed
Summary

Polyurethane elastomers (PUEs) with high microphase separation resist fatigue by managing heat and maintaining structural integrity. Low separation PUEs fail faster due to heat buildup and structural collapse.

Keywords:
compressive fatiguehierarchical structuremicrophase separationpolyurethanethermo-mechanical coupling effects

More Related Videos

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

23.0K
Ultrasonic Fatigue Testing in the Tension-Compression Mode
06:54

Ultrasonic Fatigue Testing in the Tension-Compression Mode

Published on: March 7, 2018

11.1K

Related Experiment Videos

Last Updated: Jan 14, 2026

A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
07:15

A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli

Published on: December 11, 2014

14.2K
Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

23.0K
Ultrasonic Fatigue Testing in the Tension-Compression Mode
06:54

Ultrasonic Fatigue Testing in the Tension-Compression Mode

Published on: March 7, 2018

11.1K

Area of Science:

  • Materials Science
  • Polymer Science
  • Mechanical Engineering

Background:

  • Polyurethane elastomers (PUEs) are vital for demanding applications but degrade under compressive fatigue due to heat accumulation.
  • The complex interplay between heat, mechanics, and microstructural changes in PUEs under fatigue is not fully understood.

Purpose of the Study:

  • To investigate the thermo-mechanical behavior and microstructural evolution of PUEs with varying degrees of microphase separation under cyclic compression.
  • To establish a structure-property relationship for designing fatigue-resistant PUEs.

Main Methods:

  • Design and synthesis of PUEs with low (LP) and high (HP) microphase separation.
  • Synchronized temperature-field monitoring and multiscale characterization techniques.
  • Analysis of microstructural changes (hard segment domains, spherulites) under cyclic compression.

Main Results:

  • LP-PUEs exhibited rapid heat buildup, disordered hard segment domains, and spherulite fragmentation leading to structural collapse and a 17.2% compression set.
  • HP-PUEs demonstrated stress distribution via lamellar reorientation and controlled spherulite fragmentation, preserving structural integrity.
  • HP-PUEs showed superior fatigue durability with a significantly lower compression set (6.2%).

Conclusions:

  • The study elucidates the distinct thermo-mechanical evolution pathways in PUEs based on microphase separation.
  • A clear structure-property relationship was established, highlighting the importance of ordered hard-segment networks for fatigue resistance.
  • Findings provide a basis for designing advanced PUEs with enhanced durability for high-stress applications.