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Strength and durability of steel to composite joints for marine application

Strength and durability of steel to composite joints for marine application
Strength and durability of steel to composite joints for marine application
This thesis deals with the assessment of the strength and durability of steel to composite
joints for composite superstructures on ships where reduced weight is a design driver. The
purpose of the work is to understand the long-term performance characteristics of hybrid
connections to allow for improvements to the design of hybrid structures. Two joints were
investigated in the present research. The first was a full-scale connection suitable for
application in superstructures of marine vehicles, specifically a helicopter hanger on a naval
vessel. The second was a generic steel/composite connection for testing performance after
hygrothermal ageing.

The strength and durability of the full-scale connection were examined in compression, the
loading scenario representative of in-service conditions. The results indicated that the static
and fatigue performance were in excess of the realistic in-service loading conditions.
Failure for both static and fatigue tests were comparable and therefore good confidence in
the prediction of the joint’s failure was achieved. The generic hybrid connection was
artificially aged through immersion in water. The results indicated that there was no
significant reduction in the performance of the joint in either static tension or bending.

The numerical modelling highlighted a number of issues. Due to the geometry of the joint
high stress concentration factors were observed in some locations. It is in these areas that
failure of the joint was predicted in the numerical modelling. Similar results were obtained
experimentally and this gave confidence in the modelling of the joint. Numerical
parametric and optimisation studies were conducted to assess the influence of the joint
geometry on performance characteristics obtained from both the experimental and
numerical studies. This highlighted that improvements to the performance of the joint
could be obtained through geometric changes alone.
Boyd, Stephen William
bcbdefe0-5acf-4d6a-8a16-f4abf7c78b10
Boyd, Stephen William
bcbdefe0-5acf-4d6a-8a16-f4abf7c78b10
Shenoi, Ajit
a37b4e0a-06f1-425f-966d-71e6fa299960
Blake, James
6afa420d-0936-4acc-861b-36885406c891

Boyd, Stephen William (2006) Strength and durability of steel to composite joints for marine application. University of Southampton, School of Engineering Sciences, Doctoral Thesis, 223pp.

Record type: Thesis (Doctoral)

Abstract

This thesis deals with the assessment of the strength and durability of steel to composite
joints for composite superstructures on ships where reduced weight is a design driver. The
purpose of the work is to understand the long-term performance characteristics of hybrid
connections to allow for improvements to the design of hybrid structures. Two joints were
investigated in the present research. The first was a full-scale connection suitable for
application in superstructures of marine vehicles, specifically a helicopter hanger on a naval
vessel. The second was a generic steel/composite connection for testing performance after
hygrothermal ageing.

The strength and durability of the full-scale connection were examined in compression, the
loading scenario representative of in-service conditions. The results indicated that the static
and fatigue performance were in excess of the realistic in-service loading conditions.
Failure for both static and fatigue tests were comparable and therefore good confidence in
the prediction of the joint’s failure was achieved. The generic hybrid connection was
artificially aged through immersion in water. The results indicated that there was no
significant reduction in the performance of the joint in either static tension or bending.

The numerical modelling highlighted a number of issues. Due to the geometry of the joint
high stress concentration factors were observed in some locations. It is in these areas that
failure of the joint was predicted in the numerical modelling. Similar results were obtained
experimentally and this gave confidence in the modelling of the joint. Numerical
parametric and optimisation studies were conducted to assess the influence of the joint
geometry on performance characteristics obtained from both the experimental and
numerical studies. This highlighted that improvements to the performance of the joint
could be obtained through geometric changes alone.

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More information

Published date: April 2006
Organisations: University of Southampton

Identifiers

Local EPrints ID: 142615
URI: http://eprints.soton.ac.uk/id/eprint/142615
PURE UUID: 13fb63ce-1f13-4fef-96f7-4d38614f9a53
ORCID for James Blake: ORCID iD orcid.org/0000-0001-5291-8233

Catalogue record

Date deposited: 18 Aug 2010 15:28
Last modified: 14 Mar 2024 02:41

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Contributors

Thesis advisor: Ajit Shenoi
Thesis advisor: James Blake ORCID iD

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