zldmЗаводская лаборатория. Диагностика материаловIndustrial laboratory. Diagnostics of materials1028-68612588-0187ООО «Издательство «ТЕСТ-ЗЛ»10.26896/1028-6861-2023-89-12-81-87zldm-2085Research ArticleИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ. МЕХАНИКА МАТЕРИАЛОВ: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬ. ОБМЕН ОПЫТОМTESTING OF STRUCTURE AND PARAMETERS. MECHANICAL TESTING METHODS. EXCHANGE OF EXPERIENCEЭкспериментальное определение вязкости межслойного разрушения композитного материалаExperimental determination of the interlayer fracture toughness of a composite materialБелоусовИ. С.BelousovI. S.

Илья Сергеевич Белоусов

630051, Новосибирск, ул. Ползунова, д. 21; 630073, г. Новосибирск, пр-т К. Маркса, д. 20

Il’ya S. Belousov

21, Polzunova ul., Novosibirsk, 630051; 20, K. Marksa prosp., Novosibirsk, 630073

nio2_s2024@sibnia.ruБеспаловВ. А.BespalovV. A.

Валерий Андреевич Беспалов

630051, Новосибирск, ул. Ползунова, д. 21

Valerii A. Bespalov

21, Polzunova ul., Novosibirsk, 630051

СибНИА им. С.А. Чаплыгина; Новосибирский государственный технический университетРоссияS.A. Chaplygin Siberian Research Institute of Aviation; Novosibirsk State Technical UniversityRussian FederationСибНИА им. С.А. ЧаплыгинаРоссияS.A. Chaplygin Siberian Research Institute of AviationRussian Federation20231812202389128187Copyright © Белоусов И.С., Беспалов В.А., 20232023Белоусов И.С., Беспалов В.А.Belousov I.S., Bespalov V.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.zldm.ru/jour/article/view/2085

При решении задачи моделирования распространения межслоевых дефектов в многослойных композитных материалах необходимо знать характеристики рассматриваемого материала, связанные с процессами разрушения. Цель данной работы — определение межслоевой вязкости разрушения в случае нормального отрыва — GIc. Представлены результаты испытаний по определению вязкости разрушения в условиях нормального отрыва. На основании полученных данных проведено конечно-элементное моделирование испытаний. Процесс расслоения моделировали с помощью подходов, наиболее распространенных в рамках метода конечных элементов: VCCT (virtual crack closure technique) и CZM (cohesive zone model). В данных подходах вязкость разрушения используется как основной параметр возникновения расслоения. Проведено сравнение полученных данных с экспериментом. Для подтверждения корректности экспериментальных данных вязкости разрушения GIс проведено моделирование процесса испытаний на сжатие образца типа полоса с дефектом в виде сквозного непроклея. Данная задача включает в себя нелинейный статический расчёт с учетом потери устойчивости и последующего закритического поведения и, как следствие, распространения зоны расслоения. Результаты, полученные с помощью конечно-элементного моделирования, согласуются с имеющимися экспериментальными данными.

Modeling the propagation of interlaminar defects in multilayer composite materials requires knowledge of the characteristics of the material under study associated with the fracture processes. The goal of the study is determination of the interlaminar fracture toughness in the case of normal traction (GIc). Finite element modeling of testing was carried out proceeding from the data obtained. The delamination process was modeled using the most common approaches within the finite element method: VCCT (virtual crack closure technique) and CZM (cohesive zone model), wherein the fracture toughness is used as the main parameter for the occurrence of delamination. The obtained data are compared with the experiment. To confirm the correctness of the obtained experimental data on the fracture toughness GIc, modeling of the process of compression testing of a strut-type specimen with a defect in the form of a through-the-width delamination was carried out. This problem includes a nonlinear static solution with buckling and subsequent post-buckling behavior, and, as a result, the spread of the delamination zone. The data obtained using finite element modeling are consistent with the available experimental data.

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The authors declare that there are no conflicts of interest present.