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Related Experiment Video

Updated: Jan 19, 2026

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

Local viscoelasticity at resin-metal interface analyzed with spatial-decomposition formula for relaxation modulus.

Hodaka Mori¹, Nobuyuki Matubayasi²

¹DENSO Corporation, 1-1, Showa-cho, Kariya, Aichi 448-8661, Japan.

The Journal of Chemical Physics

|September 23, 2019

Summary

A new spatial-decomposition formula analyzes local viscoelasticity by decomposing the relaxation modulus. Strong resin-metal adhesion creates a viscous layer, impacting stress-stress correlations at the interface.

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Last Updated: Jan 19, 2026

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Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing

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Published on: July 3, 2020

Area of Science:

Materials Science
Polymer Physics
Computational Chemistry

Background:

Understanding interfacial viscoelasticity is crucial for material design.
Existing models often struggle to capture complex behaviors at material interfaces.

Purpose of the Study:

To introduce a spatial-decomposition formula for analyzing local viscoelasticity.
To investigate the impact of adhesion strength on resin layer formation and dynamics at a resin-metal interface.

Main Methods:

Developed a spatial-decomposition formula for the relaxation modulus.
Applied the formula to the Kremer-Grest model at a resin-metal interface.
Analyzed spatially decomposed stress-stress time correlation functions.

Main Results:

Strong resin-metal interaction leads to a resin layer significantly larger than segment size.
Interfacial effects are localized near the wall only with weak adhesion.
The layer region exhibits higher viscosity (longer stress-stress correlation times) under strong adhesion.

Conclusions:

The spatial-decomposition formula provides a general framework for interfacial viscoelasticity analysis.
Adhesion strength dictates the relationship between stress-stress correlations and interfacial structure.
The study reveals how segment-scale interactions influence local stress dynamics at interfaces.