Durability of structures of polymer composites affected by static loads and climatic factors

Comparative analysis of two models for predicting residual resource of polymer composite, one proposed by specialists from RS Technologies Inc and the other proposed by Institute of Oil and Gas Problems SB RAS (Russia), was carried out to obtain service life of composite poles for power transmission lines manufactured by RS Technologies Inc (Canada) for cold climate of Republic of Sakha (Yakutia). Models are based on experimental studies of strength of materials during accelerated and full-scale climatic tests. The difference lies in the presence of parameters of climatic zone and test methods in the first model, while the second model considers changes in physical and mechanical properties and structure of materials during aging under conditions of full-scale exposure and accelerated climatic tests. Comparison of results of predicting the durability of fiberglass products in cold climate of Yakutsk (Russia) according to Institute of Oil and Gas Problems SB RAS model and similar products in Calgary (Canada) climate (the closest in terms of climate conditions) according to RS Technologies Inc model showed the same results. Service life of composite support material was approximately 120 years with specified level of permissible decrease in characteristic property index of 75% of the original.

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“…Model [15] for predicting kinetics of changes in short-term strength of plastics during aging in cold climate was developed and tested:…”

Section: Practical Partmentioning

confidence: 99%

Predicting the Climatic Resistance of the Material and the Durability of the Structural Elements of the Composite Tower of the Power Line

Fedorov

Vasiliev

Savvina

2023

MSF

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“…A fundamental improvement of the approaches mentioned can be achieved by constructing mathematical models oriented towards physical representations of the phenomena under study [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Generalized Durability Models and their Application to Solving Problems on Predicting the Defining Characteristics of Composites

Gusev

Бакулин

2022

Mech Compos Mater

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The promising ways to predict the durability of polymer composites under the influence of extreme factors of the external environment and operational loads are investigated. The possibilities of effective predicting the defining characteristics (the residual life, strength, reliability, and durability) of composites are studied based on the information received in the first years of their operation. The development of generalized durability models of composites under extreme conditions is based on the main provisions of the modern molecular kinetic theory (MKT). This is due to the fact that chemical transformations in composites can occur both at intermolecular and intramolecular levels. On the basis of the modern MKT, the issue of matching the defining parameters of mathematical models calculated by solving prediction problems within the framework of formulated refined variational statements taking into account the results of experimental measurements at the macrolevel with the corresponding defining parameters of physical models describing molecular interactions at the microlevel is investigated. Results of computational experiments are presented.

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“…Synergism on exposure to a humid atmosphere and mechanical loads was found by Helbling and Karbhari [8] and by Roylance and Roylance [9]. During modelling of the combined effect of climate and mechanical loads it was shown [10] that the durability of construction elements manufactured from polymer composites under combined exposure to climate and mechanical loads depends considerably on the level of loading. At load levels of over 80% of the critical load, the durability is determined only by the magnitude of the load.…”

mentioning

confidence: 97%

The Effect of Climatic Factors and Mechanical Loading on the Properties of Carbon-Fibre-Reinforced Plastic Based on An Epoxy Binder

Kirillov

Ефимов

Шведкова

2013

International Polymer Science and Technology

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For carbon-fibre-reinforced plastic based on epoxy binder EDT-69N, an investigation was made of the effect of climatic factors in accelerated heat and humidity tests and in natural climatic tests under static and cyclic loading on change in the residual strength of the material in bend, its moisture content, and structural transformations in the material (glass transition region and glass transition temperature).

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Durability of structures of polymer composites affected by static loads and climatic factors

Cited by 6 publications

References 0 publications

Predicting the Climatic Resistance of the Material and the Durability of the Structural Elements of the Composite Tower of the Power Line

Predicting the Climatic Resistance of the Material and the Durability of the Structural Elements of the Composite Tower of the Power Line

Generalized Durability Models and their Application to Solving Problems on Predicting the Defining Characteristics of Composites

The Effect of Climatic Factors and Mechanical Loading on the Properties of Carbon-Fibre-Reinforced Plastic Based on An Epoxy Binder

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