Dynamic Response of Gradient Foams
The Voronoi-type density-gradient foams with three layers are numerically simulated, in order to study their dynamic response. The focus of the study is not only on the energy absorption and the distal stress of the gradient foam, but also the impact stress. The results obtained show that reduc...
Збережено в:
| Дата: | 2014 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут проблем міцності ім. Г.С. Писаренко НАН України
2014
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| Назва видання: | Проблемы прочности |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/112705 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Dynamic Response of Gradient Foams / L.L. Hu, Y. Liu // Проблемы прочности. — 2014. — № 2. — С. 172-177. — Бібліогр.: 9 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The Voronoi-type density-gradient foams with
three layers are numerically simulated, in order
to study their dynamic response. The focus of the
study is not only on the energy absorption and
the distal stress of the gradient foam, but also the
impact stress. The results obtained show that reduction
of both the initial impact peak stress,
and the early energy absorption of the gradient
foam can be privided by reducing density of the
first layer. The undesirable effect on the energy
absorption can be alleviated by diminishing the
thickness of the first layer. The difference between
densities of the first two layers density
should be limited to a certain range to avoid the
peak stress appearing in the second layer. A
weak distal layer can reduce the distal stress of
the foam under high-velocity impact, while a
high density gradient between the last two layers
will result in the early increase of the distal stress
under moderate-velocity impact |
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