Limit state analyses in design of thin-walled marine structures-some aspects on length-scales

Jani Romanoff, Heikki Remes, Petri Varsta, Bruno Reinaldo Goncalves, Ingrit Lillemäe-Avi, Mihkel Körgesaar, Jasmin Jelovica, Sami Liinalampi

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)


Present paper gives an overview of the factors that affect the strength and structural design of advanced thin-walled marine structures with reduced plate thickness or alternative topologies to those used today in marine industry. Due to production induced initial deformations and resulting geometrical nonlinearity, the classical division between primary, secondary and tertiary responses becomes strongly coupled. Volume-averaged, non-linear response of structural element can be used to define the structural stress strain relation that enables analysis at the next, larger, length scale. This, today's standard homogenization process needs to be complemented with localization, where the stresses are assessed at the details, such as welds for fatigue analysis. Due to this, the production-induced initial distortions need to be considered with high accuracy. Another key question is the length-scale interaction in terms of continuum description. Non-classical continuum mechanics are needed when consequtive scales are close. Strain-gradients are used to increase the accuracy of the kinematical description of beams, plates and shells. The paper presents examples of stiffened and sandwich panels covering limit states such as fatigue, non-linear buckling and fracture.

Original languageEnglish
Title of host publicationHonoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791851333
Publication statusPublished - 1 Jan 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


ConferenceInternational Conference on Ocean, Offshore and Arctic Engineering
Abbreviated titleOMAE
Internet address


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