Unsymmetrical buckling of orthotropic annular plates and spherical caps under internal pressure

Результат исследований: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

The work is concerned with asymmetric buckling of clamped nonuniform orthotropic shallow spherical shells under internal pressure. The effect of degree of orthotropy and material inhomogeneity, the curvature of a shell and the radius of the circular hole in the center of a shell on the buckling load is examined. A mesh-like structure in a human eye called Lamina Cribrosa (LC) may be modeled with such shell. The LC is a part of sclera, where the optic nerve fibres pass through and where the layer of sclera becomes thinner and many little pores appear. The buckling of the LC in the non-axisymmetric state in the neighborhood of the edge could cause edamas and folds at the periphery of the LC, atrophy of the optic nerve fibres and the eventual loss of the sight. The non-symmetric part of the solution is sought in terms of multiples of harmonics in angular coordinate. The numerical method is employed to evaluate the lowest value of the load, which leads to the appearance of waves in the circumferential direction. It is shown that if the modulus of elasticity decreases away from the center of the shell, the critical internal pressure for nonsymmetric buckling is significantly lower than for a shell with constant mechanical properties and the number of waves in the circumferential direction increases with the degree of non-uniformity.

Язык оригиналаанглийский
Название основной публикацииCOMPDYN 2019 - 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings
РедакторыManolis Papadrakakis, Michalis Fragiadakis
ИздательNational Technical University of Athens (NTUA)
Страницы3556-3562
Число страниц7
ISBN (электронное издание)9786188284470
СостояниеОпубликовано - 1 янв 2019
Событие7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2019 - Crete, Greece, Hersonissos, Греция
Продолжительность: 24 июн 201926 июн 2019
Номер конференции: 7th
https://2019.compdyn.org

Серия публикаций

НазваниеCOMPDYN Proceedings
Том2
ISSN (печатное издание)2623-3347

конференция

конференция7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2019
Сокращенный заголовок COMPDYN 2019
СтранаГреция
ГородHersonissos
Период24/06/1926/06/19
Адрес в сети Интернет

Предметные области Scopus

  • Компьютерные технологии в науках о земле
  • Геотехническая инженерия и инженерная геология
  • Вычислительная математика
  • Городское и структурное проектирование

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