Приближенный метод оценки остаточной прочности композитных тонкостенных элементов конструкции ЛА при наличии низкоскоростного ударного повреждения

Авторы

Гарифуллин М. Ф., Казаков И. А.^*, Киреев В. А.

Центральный аэрогидродинамический институт имени профессора Н.Е. Жуковского (ЦАГИ), ул. Жуковского, 1, Жуковский, Московская область, 140180, Россия

*e-mail: normist@tsagi.ru

Аннотация

Рассмотрены упрощенные расчетные модели, применяемые для оценки остаточной прочности композитных пластин с ударным повреждением. Отмечены их основные преимущества и недостатки, а также границы применимости. Предложена модель изменения деградации упругих свойств композитного материала в области повреждения. С помощью этой модели выполнены расчеты концентрации напряжений вокруг дефекта с исходными данными, приведенными в литературе. Рассмотрен вариант использования эмпирической зависимости для определения степени деградации свойств на основе данных о размерах повреждения. 

Ключевые слова:

остаточная прочность композитных пластин, низкоскоростные ударные повреждения, концентрация напряжений в зоне дефектов

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