Prediction of the non-isothermal creep strain of a glassy polymer on the basis of dynamic analysis results

Kontou, E.; Spathis, G.

doi:10.1007/s00707-019-02545-1

Cited by 3 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Temperature and time-related changes in the structure of polymers can lead to significant discrepancies between the time–temperature shift factors and master curves constructed based on the results of DMTA tests and traditional strain-controlled macrotests [ 34 , 111 ]. It is widely accepted that DMTA temperature and frequency scanning is an efficient approach, in terms of time and materials savings, for long-term predictions of the viscoelastic behaviour of polymer composites.…”

Section: Models For Predicting Materials Durability and Service Lifetimementioning

confidence: 99%

“…It is widely accepted that DMTA temperature and frequency scanning is an efficient approach, in terms of time and materials savings, for long-term predictions of the viscoelastic behaviour of polymer composites. In a recent study by Kontou and Spathis [ 111 ], the nonisothermal creep response of PMMA was predicted based on DMTA results. The authors introduced the energy barrier’s distribution density function determined from the experimental frequency-sweep data of the loss modulus.…”

Section: Models For Predicting Materials Durability and Service Lifetimementioning

confidence: 99%

See 1 more Smart Citation

Modelling of Environmental Ageing of Polymers and Polymer Composites—Durability Prediction Methods

et al. 2022

View full text Add to dashboard Cite

Polymers and polymer composites are negatively impacted by environmental ageing, reducing their service lifetimes. The uncertainty of the material interaction with the environment compromises their superior strength and stiffness. Validation of new composite materials and structures often involves lengthy and expensive testing programs. Therefore, modelling is an affordable alternative that can partly replace extensive testing and thus reduce validation costs. Durability prediction models are often subject to conflicting requirements of versatility and minimum experimental efforts required for their validation. Based on physical observations of composite macroproperties, engineering and phenomenological models provide manageable representations of complex mechanistic models. This review offers a systematised overview of the state-of-the-art models and accelerated testing methodologies for predicting the long-term mechanical performance of polymers and polymer composites. Accelerated testing methods for predicting static, creep, and fatig ue lifetime of various polymers and polymer composites under environmental factors’ single or coupled influence are overviewed. Service lifetimes are predicted by means of degradation rate models, superposition principles, and parametrisation techniques. This review is a continuation of the authors’ work on modelling environmental ageing of polymer composites: the first part of the review covered multiscale and modular modelling methods of environmental degradation. The present work is focused on modelling engineering mechanical properties.

show abstract

Section: Models For Predicting Materials Durability and Service Lifetimementioning

confidence: 99%

Section: Models For Predicting Materials Durability and Service Lifetimementioning

confidence: 99%

Modelling of Environmental Ageing of Polymers and Polymer Composites—Durability Prediction Methods

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Ηereafter, the above analysis was employed to describe and predict the non-isothermal creep response of a polymeric material. [14] The scope of the present work is the implementation of the non-isothermal description in a more complex procedure including creep response under a number of thermal cycles, namely heating and subsequent cooling.…”

Section: Constitutive Analysismentioning

confidence: 99%

“…The above treatment has been further corroborated, by its implementation on non-isothermal creep procedure. [14] In this research, following the above analysis, the prediction of the non-isothermal creep strain data on the basis of independent experimental results, namely dynamic mechanical analysis and stress-strain results at various temperatures, has been achieved.…”

Section: Introductionmentioning

confidence: 99%

Model Simulation of Creep and Thermal Ratcheting of Engineering Polymers

Spathis

Kontou

2021

Macro Theory & Simulations

View full text Add to dashboard Cite

In the present work, the creep response at specific temperatures and stress level of several polymers has been modeled by a viscoelastic model, analyzed in previous works. In particular, the experimental creep results under thermal cycling of polymers used in bolted flange connections, utilized as components of pressure vessel and piping are employed. The analysis is focused on the experimental results for polymeric flange materials like high density polyethylene and three types of gasket materials, namely poly-tetrafluoroethylene PTFE (expanded e-and virgin v-) and clickable nucleic acid. It has been proved that by the implementation of the model on a simple creep curve at a specific temperature, the model parameters could be evaluated. Hereafter, by imposing a thermal cycling process, two more parameters, associated with thermal ratcheting, could be acquired. It is found that the thermal ratcheting behavior exhibited by the employed materials, could be captured with a good accuracy. Given that the effect of thermal ratcheting on the long-time performance of polymers in targeted applications is a crucial issue, the research findings in the present work are encouraging for the design of appropriate materials, and the prediction of thermal ratcheting.

show abstract

Dynamic compressive behavior and constitutive model of polyamide-6 at different temperatures and strain rates

Zhang,

Wu,

et al. 2024

Acta Mech

View full text Add to dashboard Cite

Prediction of the non-isothermal creep strain of a glassy polymer on the basis of dynamic analysis results

Cited by 3 publications

References 18 publications

Modelling of Environmental Ageing of Polymers and Polymer Composites—Durability Prediction Methods

Modelling of Environmental Ageing of Polymers and Polymer Composites—Durability Prediction Methods

Model Simulation of Creep and Thermal Ratcheting of Engineering Polymers

Dynamic compressive behavior and constitutive model of polyamide-6 at different temperatures and strain rates

Contact Info

Product

Resources

About