4.6 Article

Mechanical properties of viscoelastic materials subjected to thermal-oxidative aging: An experimental and theoretical study

Related references

Note: Only part of the references are listed.
Article Polymer Science

Study on viscoelastic materials at micro scale pondering supramolecular interaction impacts with DMA tests and fractional derivative modeling

Yeshou Xu et al.

Summary: This study investigates the mechanical behaviors of nitrile rubber viscoelastic material using dynamic thermomechanical analyzer (DMA) under different strain amplitudes, excitation frequencies, and environmental temperatures. A supramolecular interaction and molecular structures modified fractional Kelvin (SMF Kelvin) model that takes into account the temperature and frequency impacts is proposed and validated with DMA test results. The effectiveness of the proposed SMF Kelvin model is further demonstrated through the test results of the viscoelastic damper at different temperatures.

JOURNAL OF APPLIED POLYMER SCIENCE (2023)

Article Engineering, Mechanical

Hyperelastic Hybrid Molecular Chain Model of Thermal-Oxidative Aging Viscoelastic Damping Materials Based on Physical-Chemical Process

Qiang-Qiang Li et al.

Summary: This paper analyzes the effects of thermal-oxidative aging on the molecular chains of viscoelastic damping materials (VDMs) and proposes a hyperelastic hybrid molecular chain model for aging VDMs. The model is verified using test data and found to accurately reflect the mechanical behavior of aging VDMs under thermal-oxidative conditions.

JOURNAL OF ENGINEERING MECHANICS (2023)

Article Construction & Building Technology

Seismic performance and material-level damage evolution of retrofitted RC framed structures by high-performance AVED under different shear-span ratio

Yao-Rong Dong et al.

Summary: In order to enhance the seismic performance of reinforced concrete framed structures with insufficient seismic capability, high-performance acrylate viscoelastic dampers (AVED) have been developed. Dynamic mechanical performance tests have been carried out on high-performance AVED, and a new retrofitting strategy using AVED for RC framed structures is proposed. The seismic performance of seven RC frame specimens and seven AVED-added RC frame specimens with different shear-span ratios are compared to systematically study the new retrofitting structural system. The research results show that the self-developed AVED has excellent energy-consumption capability and greatly improves the seismic performance of the retrofitted RC frame structure.

JOURNAL OF BUILDING ENGINEERING (2023)

Article Construction & Building Technology

Tests and Micro-Macro Cross-Scale Model of High-Performance Acrylate Viscoelastic Dampers Used in Structural Resistance

Yao-Rong Dong et al.

Summary: This study aims to develop a high-performance acrylate viscoelastic damper (HAVED) for low-frequency vibration control of building structures. A series of tests were conducted to investigate the dynamic mechanical performance and energy dissipation capacity of HAVED under different ambient temperatures, excitation frequencies, and displacement amplitudes. The results showed that HAVED has excellent energy dissipation capacity and good adaptability to the external environment. The proposed high-order fractional derivative micro-macro cross-scale mathematical model can comprehensively describe the influence of various factors on the mechanical properties of HAVED.

JOURNAL OF STRUCTURAL ENGINEERING (2023)

Article Mechanics

A unified mechanical based approach to fracture properties estimates of rubbers subjected to aging

R. Kadri et al.

Summary: This study examines the impact of aging on mechanical properties of rubber materials, with modifications to the rubber network structure through crosslinking and chain scission mechanisms. A predictive mechanical tool based on an hyperelastic constitutive model coupled with physical-chemical parameters was proposed to estimate mechanical properties. Relevant indicators of damage for crosslinking or chain scission processes, such as elastically active chains concentrations and swelling rate, were introduced as damage parameters in the mechanical modeling, leading to satisfactory predictions of mechanical behavior and stress-strain estimates at break.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2022)

Article Polymer Science

Nonlinear Schapery viscoelastic material model for thermoplastic polymers

Thomas Zink et al.

Summary: A new approach is introduced to model the nonlinear mechanical behavior of viscoelastic materials, showing good agreement between the predictions of the nonlinear model and experimental data.

JOURNAL OF APPLIED POLYMER SCIENCE (2022)

Article Chemistry, Applied

Thermal aging of acrylic-urethane network: Kinetic modeling and end-of-life criteria combined with mechanical properties

Takato Ishida et al.

Summary: This study investigates the multiscale analysis of acrylic urethane networks (AUN) and establishes a kinetic model for predicting AUN oxidation. By monitoring chemical changes during pure thermal oxidation of AUN, it was found that oxidation induces predominant crosslinking and decreases toughness. The novel kinetic model for AUN thermal aging was developed based on a mechanistic scheme previously established for polyamide 11.

PROGRESS IN ORGANIC COATINGS (2022)

Article Polymer Science

Molecule Dynamics Simulation of the Effect of Oxidative Aging on Properties of Nitrile Rubber

Jinsong Yang et al.

Summary: The effects of oxidative aging on the molecular scale properties of nitrile rubber were studied using molecular dynamics simulation. The introduction of hydroxyl and carbonyl groups into rubber chains mimicked oxidative aging. The results showed that elevated temperature increased the mobility of rubber chains, while compressive strain resulted in packing and rearrangement of chains. The addition of hydroxyl and carbonyl groups enhanced polarity and rigidity, leading to weaker mobility. Compressive strain and oxidative aging both decreased fractional free volume, inhibiting diffusion and slowing down aging. This study provides insights into the molecular changes and their effects on rubber materials.

POLYMERS (2022)

Article Engineering, Mechanical

Viscoelastic-viscoplastic modeling of epoxy based on transient network theory

Makoto Uchida et al.

Summary: This study investigates the strain rate- and temperature-dependent nonlinear mechanical behavior of glassy polymers using experimental and numerical methods. The effects of strain rate and temperature on the mechanical responses and strain field development of epoxy are evaluated experimentally. The study extends the transient network (TN) theory to represent the temperature- and strain rate-dependent mechanical behavior of the glassy polymer, showing consistent results with experimental data.

INTERNATIONAL JOURNAL OF PLASTICITY (2022)

Article Mechanics

Physics and chemistry-based constitutive modeling of photo-oxidative aging in semi-crystalline polymers

Aimane Najmeddine et al.

Summary: This paper proposes a physio-chemically-based constitutive framework to predict the response of severely photo-oxidatively aged semi-crystalline polymers. The framework is validated using experiments on low-density polyethylene, confirming its accuracy and robustness.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2022)

Article Engineering, Mechanical

Microstructure-Based Equivalent Visco-Hyperelastic Model of Viscoelastic Damper

Qiang-Qiang Li et al.

Summary: In this study, a microstructure-based equivalent visco-hyperelastic model is proposed to describe the nonlinear mechanical characteristics of viscoelastic dampers. The experiments conducted demonstrate that the proposed model accurately describes the mechanical properties of viscoelastic dampers at different frequencies, temperatures, and strain amplitudes.

JOURNAL OF ENGINEERING MECHANICS (2022)

Article Construction & Building Technology

Development of Viscoelastic Damper Based on NBR and Organic Small-Molecule Composites

Teng Ge et al.

Summary: In this study, a series of novel Viscoelastic (VE) materials were produced by adding different types and amounts of organic small molecule modifiers to neat nitrile-butadiene rubber (NBR). The mechanical properties of the VE materials were tested, and the most optimal formulation was selected for manufacturing a VE damper. The high energy dissipation capacity of the VE damper was confirmed, and a new mathematical model considering amplitude and frequency effects was proposed and validated.

JOURNAL OF MATERIALS IN CIVIL ENGINEERING (2022)

Article Engineering, Geological

Experimental study and mechanical model of viscoelastic damping limb-like-structure device with coupling nonlinear characteristics

Zhen-Hua He et al.

Summary: This paper proposes a viscoelastic damping limb-like-structure (VE-LLS) device, which combines a viscoelastic damper and a limb-like-structure to improve the vibration control performance of building structures. Experimental and numerical analysis show that the proposed device has good energy dissipation capacity and stability, and the established mechanical model accurately describes its mechanical properties.

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING (2022)

Article Polymer Science

Investigation of hygrothermal aging on the polyurethane-based (PUB) adhesive: substantiating competition scenario between sub-aging thermo-oxidation and hydrolytic phenomena

Mamoon Shaafaey et al.

Summary: This study explores the effects of accelerated aging on a polyurethane based adhesive, particularly focusing on the competition between thermo-oxidation and hydrolytic aging during hygrothermal exposure. Various tests were conducted on samples exposed to different environments, showing that the mechanical and environmental damage is a collaborative effect of all exposure environments involved. Chemical test outcomes confirmed the results obtained from mechanical tests.

JOURNAL OF POLYMER RESEARCH (2021)

Article Engineering, Mechanical

A Physically-Based Model for Thermo-Oxidative and Hydrolytic Aging of Elastomers

Amir Bahrololoumi et al.

Summary: The proposed computationally efficient model accurately predicts the mechanical performance loss of elastomers due to chemical aging. It simplifies the necessary material parameters and is relevant for various decay mechanisms, such as thermo-oxidation and hydrolytic aging.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2021)

Article Polymer Science

Constitutive modeling of elastomers during photo- and thermo-oxidative aging

Hamid Mohammadi et al.

Summary: In this study, a micro-mechanical model was proposed to describe the constitutive behavior of cross-linked polymeric systems under the effects of temperature and UV radiation. Different rates of chain scission and bond creation during aging can lead to changes in cross-link density and damage in the elastomer, resulting in a harder or softer matrix or even transitioning between hardening and softening. The proposed model is a generalized micromechanical model for both thermo-oxidative and photo-oxidative aging, with parameters based on temperature and UV radiation intensity.

POLYMER DEGRADATION AND STABILITY (2021)

Article Thermodynamics

On the ageing behaviour of NBR: chemomechanical experiments, modelling and simulation of tension set

Bruno Musil et al.

CONTINUUM MECHANICS AND THERMODYNAMICS (2020)

Article Engineering, Mechanical

A multi-physics constitutive model to predict hydrolytic aging in quasi-static behaviour of thin cross-linked polymers

Amir Bahrololoumi et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2020)

Article Polymer Science

Understanding decay functions and their contribution in modeling of thermal-induced aging of cross-linked polymers

Hamid Mohammadi et al.

POLYMER DEGRADATION AND STABILITY (2020)

Article Materials Science, Multidisciplinary

A thermodynamically consistent chemo-mechanically coupled large deformation model for polymer oxidation

Shabnam Konica et al.

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS (2020)

Article Engineering, Mechanical

Experimental and Theoretical Study of High-Energy Dissipation-Viscoelastic Dampers Based on Acrylate-Rubber Matrix

Xu Zhao-Dong et al.

JOURNAL OF ENGINEERING MECHANICS (2020)

Article Polymer Science

Thermo-oxidative ageing of a SBR rubber: effects on mechanical and chemical properties

Naima Rezig et al.

JOURNAL OF POLYMER RESEARCH (2020)

Article Physics, Fluids & Plasmas

Necking of double-network gels: Constitutive modeling with microstructural insight

Vahid Morovati et al.

PHYSICAL REVIEW E (2020)

Article Mechanics

New developments in fracture of rubbers: Predictive tools and influence of thermal aging

M. Nait Abdelaziz et al.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2019)

Article Mechanics

Characterization and modeling of filled rubber submitted to thermal aging

R. Bouaziz et al.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2019)

Article Materials Science, Multidisciplinary

A generalized approach to generate optimized approximations of the inverse Langevin function

Vahid Morovati et al.

MATHEMATICS AND MECHANICS OF SOLIDS (2019)

Article Engineering, Mechanical

Tests and Modeling of Viscoelastic Damper Considering Microstructures and Displacement Amplitude Influence

Yeshou Xu et al.

JOURNAL OF ENGINEERING MECHANICS (2019)

Article Mechanics

Micro-sphere based viscoplastic constitutive model for uncured green rubber

Husnu Dal et al.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2018)

Article Materials Science, Characterization & Testing

Aging properties of styrene-butadiene rubber nanocomposites filled with carbon black and rectorite

Shaojian He et al.

POLYMER TESTING (2017)

Article Mechanics

On the representation of chemical ageing of rubber in continuum mechanics

A. Lion et al.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2012)

Article Materials Science, Multidisciplinary

NETWORK EVOLUTION MODEL OF ANISOTROPIC STRESS SOFTENING IN FILLED RUBBER-LIKE MATERIALS: PARAMETER IDENTIFICATION AND FINITE ELEMENT IMPLEMENTATION

Roozbeh Dargazany et al.

JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES (2012)

Article Materials Science, Multidisciplinary

Two-scale mechanism-based theory of nonlinear viscoelasticity

Shan Tang et al.

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS (2012)

Article Mathematics, Interdisciplinary Applications

A finite strain framework for the simulation of polymer curing. Part I: elasticity

M. Hossain et al.

COMPUTATIONAL MECHANICS (2009)

Article Materials Science, Characterization & Testing

Prediction of mechanical properties of polychloroprene during thermo-oxidative aging

T Ha-Anh et al.

POLYMER TESTING (2005)

Article Engineering, Manufacturing

The effect of filler-filler and filler-elastomer interaction on rubber reinforcement

J Frohlich et al.

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING (2005)

Article Construction & Building Technology

Seismic response of full-scale structure with added viscoelastic dampers

KC Chang et al.

JOURNAL OF STRUCTURAL ENGINEERING-ASCE (2004)