Change search
ReferencesLink to record
Permanent link

Direct link
Collapse of thick deepwater pipelines due to hydrostatic pressure
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).ORCID iD: 0000-0002-6388-0995
2009 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The collapse-behaviour of pipes was to be studied by use of Finite Element modelling.Existing analytical expressions for collapse were evaluated and especially the one used inDNV-OS-F101 was decided to be studied in comparison with FE-model results.Parameters that may influence the collapse capacity and are not included in the analyticalexpressions –flattening, peaking, eccentricity, local wall thickness variation, materialstress-strain curve, residual stresses - were defined and explained. A model was built inthe Finite Element software package Abaqus v6.9.1 and several articles on collapsetesting used to verify it. The aforementioned parameters were studied by use ofsensitivity studies and the results shown and discussed. Effective thickness definitions foruse in the DNV-formula and the DNV-yield stress criterion were discussed in the contextof the results. The results seemed to indicate that the transition between the elastic andplastic range of the material stress-strain curve was of great importance. The results werediscussed in the context of the different collapse-related parameters defined beforehandand some concluding remarks were made on possible further work related to thesefindings.

Place, publisher, year, edition, pages
2009. , 74 p.
Keyword [en]
buckling, pipelines
National Category
Other Mechanical Engineering
URN: urn:nbn:se:kth:diva-174084OAI: diva2:857656
Subject / course
Solid Mechanics
Educational program
Master of Science in Engineering - Mechanical Engineering
Available from: 2016-01-27 Created: 2015-09-29 Last updated: 2016-01-27Bibliographically approved

Open Access in DiVA

fulltext(3051 kB)270 downloads
File information
File name FULLTEXT01.pdfFile size 3051 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Fallqvist, Björn
By organisation
Solid Mechanics (Dept.)
Other Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 270 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 34 hits
ReferencesLink to record
Permanent link

Direct link