Nonlinear dynamic finite element analysis of thick transversly flexible sandwich panel on elastic foundation with account of damage progression in time. Part 1. Three-dimensional formulation and two-dimensional plate theory

• Видавець: Інститут проблем міцності ім. Г.С. Писаренко НАН України
• Дата: 2005
• Автор: Perel, V.Y.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут проблем міцності ім. Г.С. Писаренко НАН України 2005
• Назва видання: Проблемы прочности
• Теми: Научно-технический раздел
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/47676
• Цитувати: Nonlinear dynamic finite element analysis of thick transversly flexible sandwich panel on elastic foundation with account of damage progression in time. Part 1. Three-dimensional formulation and two-dimensional plate theory / V.Y. Perel // Проблемы прочности. — 2005. — № 2. — С. 92-106. — Бібліогр.: 13 назв. — англ.

In order to construct a plate theory for a thick transversely compressible sandwich plate with composite laminated face sheets, the author makes simplifying assumptions regarding distribution o f transverse strain components in the thickness direction. It is assumed that the transverse strains, i.e., £xz, £yz, and £zz do not vary in the thickness direction within the face sheets and the core, but can be different functions of the in-plane coordinates in different sublaminates (the face sheets and the core). An algorithm, which takes account of damage progression in dynamic problems, is incorporated into the computational scheme based on the geometrically nonlinear formulation, and is applied to failure analysis o f a sandwich plate under ground impact. The proposed model o f the sandwich plate does not require many degrees o f freedom in the finite element computations and has a wide range of applicability: it can be applied to the sandwich plates with a wide range o f ratios of thickness to the in-plane dimensionswith both thin and thick face sheets (as compared to the thickness o f the core) and to the sandwich plates with both transversely rigid and transversely compressible face sheets and cores.