Особенности высокоскоростного деформирования тонкой пластины с высокопрочным покрытием
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НТУ "ХПИ"
Abstract
Проведено компьютерное моделирование процесса высокоскоростного деформирования тонкой пластины из алюминиевого сплава с корундовым покрытием при ударе пробойником. Рассматривается динамическая контактная вязко-упругопластическая задача при больших деформациях с учетом изменения свойств материала от скоростей деформаций. Анализ полей деформаций и напряжений показал, что наличие высокопрочного тонкого покрытия дает перераспределение поля эквивалентных напряжений и приводит к разрушению нижнего покрытия.
High-speed deformation of aluminum alloy thin plate with a high-strength double-sided corundum coating was numerically simulated under impact of steel punch with a hemispherical working part. The dynamic bonded contact problem for viscoelastic-plastic boundary value conditions problem is modelled for large deformations and varying physical and mechanical materials’ properties, levels of strain rate and brittle fractures processes. Numerical simulation of impact process was carried out with finite element method based on the autonomous Euler-Lagrange approach, applying the specialized finite element software package ANSYS. Analysis of the found strain and stress fields’ distributions demonstrated that the high-strength coating contributes in reallocation of the fields’ equivalent stresses and leads only to the lower coating damage in place of the whole plate in depth.
High-speed deformation of aluminum alloy thin plate with a high-strength double-sided corundum coating was numerically simulated under impact of steel punch with a hemispherical working part. The dynamic bonded contact problem for viscoelastic-plastic boundary value conditions problem is modelled for large deformations and varying physical and mechanical materials’ properties, levels of strain rate and brittle fractures processes. Numerical simulation of impact process was carried out with finite element method based on the autonomous Euler-Lagrange approach, applying the specialized finite element software package ANSYS. Analysis of the found strain and stress fields’ distributions demonstrated that the high-strength coating contributes in reallocation of the fields’ equivalent stresses and leads only to the lower coating damage in place of the whole plate in depth.
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Особенности высокоскоростного деформирования тонкой пластины с высокопрочным покрытием / Л. В. Автономова [и др.] // Вестник Нац. техн. ун-та "ХПИ" : сб. науч. тр. Темат. вып. : Динамика и прочность машин. – Харьков : НТУ "ХПИ". – 2015. – № 57 (1166). – С. 8-10.