Напряженно-деформированное состояние металлической пластины с трещинами при различных типах кривой деформации

Напряженно-деформированное состояние металлической пластины с трещинами при различных типах кривой деформации

Автор: Васильев Иван Анндреевич, Бортяков Данил Евгеньевич, Грачев Алексей Андреевич

Журнал: Строительство уникальных зданий и сооружений @unistroy

Статья в выпуске: 7 (92), 2020 года.

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Объектом исследования является влияние кривой деформации на напряженно-деформированное состояние стальных элементов в окрестности трещины. Методы. Исследование основано на конечно-элементном решении упругопластического состояния набора образцов. Образец представляет собой пластину толщиной 0 и 20 мм с двумя краевыми трещинами длиной от 10 до 40 мм. Результаты анализа получены для билинейной кривой деформации и степенной кривой деформации для различных параметров образца. Расхождение параметров напряженно-деформированного состояния в окрестности вершины трещины для различных функций деформации материала составляет от 0,3% до 4,7%. Эта оценка расхождения позволяет принять решение о выборе модели деформации материала для дальнейшего исследования состояния материала в окрестности трещины. График расхождения параметров напряженно-деформированного состояния показывает степень влияния типа кривой деформации в пределах различных параметров образца.

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Кривая деформации, трещина, прочность, модель материала, метод конечных элементов, пластическое упрочнение, нелинейная механика разрушения

Короткий адрес: https://sciup.org/143172556

IDR: 143172556   |   DOI: 10.18720/CUBS.92.5

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