Stability Improvement of Flexible Shallow Shells Using Neutron Radiation

Abstract

Microelectromechanical systems (MEMS) are increasingly playing a significant role in the aviation industry and space exploration. Moreover, there is a need to study the neutron radiation effect on the MEMS structural members and the MEMS devices reliability in general. Experiments with MEMS structural members showed changes in their operation after exposure to neutron radiation. In this study, the neutron irradiation effect on the flexible MEMS resonators’ stability in the form of shallow rectangular shells is investigated. The theory of flexible rectangular shallow shells under the influence of both neutron irradiation and temperature field is developed. It consists of three components. First, the theory of flexible rectangular shallow shells under neutron radiation in temperature field was considered based on the Kirchhoff hypothesis and energetic Hamilton principle. Second, the theory of plasticity relaxation and cyclic loading were taken into account. Third, the Birger method of variable parameters was employed. The derived mathematical model was solved using both the finite difference method and the Bubnov–Galerkin method of higher approximations. It was established based on a few numeric examples that the irradiation direction of the MEMS structural members significantly affects the magnitude and shape of the plastic deformations’ distribution, as well as the forces magnitude in the shell middle surface, although qualitatively with the same deflection the diagrams of the main investigated functions were similar.

Behaviour of a non-linear mesh cylindrical shell as an element of mems and nems

“…The method of establishment [18,19] analyses the effect of the number of rib families and temperature influences on the stress-strain state of the shell in question. The method of establishment has a high accuracy as it can be referred to iterative methods, here each time step is a new approximation to the exact solution of the problem.…”

Методика Исследования Изменения Формы Пластин И Тонкопленочных Мембран С Использованием Геоморфометрических Подходов

“…При подробном исследовании рельефа поверхности и формы МЭМС-структур и изделий на их основе: акселерометров [22], сенсоров давления [23], адаптивной оптики [24,25] и др. Здесь необходимо анализировать и начальную форму МЭМС, и ее изменение, как под действием ожидаемых функционально необходимых воздействий [25], так и под действием различных разрушающих факторов [26].…”

Geomorphometry and microelectronic metrology: Converged realms

“…This is impossible without a fine analysis of the item topography. It is necessary to analyze both the original form of a MEMS, and its change, under the action of both expected, functionally necessary influences, and various destructive factors (Balderrama et al, 2022; Krysko et al, 2020; Le et al, 2022; Pollock et al, 2017).…”