Stress analysis of post-buckled sandwich panels

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Abstract

The paper presents a method to assess stresses in sandwich plates with periodic microstructure in the post buckling region. The fundamental assumption is that the microstructure is linear elastic and von Karman non-linearity is present only at macro-, i.e. panel-scale. This enables response evaluation by equivalent homogenous continuum with constant stiffness properties. It is shown that the homogenization cancels shear-induced, odd-terms in microstructural field variables such as displacements and stresses. These are of fundamental importance when strength of the panel must be assessed. The localization approach utilised.here neglects the actual position of the microstructure and thus is able to capture only the maximum values of these stress fluctuations. The validation of the present approach is carried out with 3D FE analyses and a good agreement is shown. The shear-induced periodic stresses are of fundamental importance when the strength in the post buckling region is assessed based on linear elastic basis.
Original languageEnglish
Title of host publicationProceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering, 2018
PublisherAmerican Society of Mechanical Engineers
Number of pages7
Volume3
ISBN (Print)978-0-7918-5122-7
DOIs
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Ocean, Offshore and Arctic Engineering - Madrid Marriott Auditorium Hotel & Conference Center, Madrid, Spain
Duration: 17 Jun 201822 Jun 2018
Conference number: 37
https://www.asme.org/events/omae2018

Publication series

NameProceedings of the ASME International Conference on Ocean Offshore and Arctic Engineering
ISSN (Print)2153-4772

Conference

ConferenceInternational Conference on Ocean, Offshore and Arctic Engineering
Abbreviated titleOMAE
CountrySpain
CityMadrid
Period17/06/201822/06/2018
Internet address

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