On this page, you can find links to our internal MSDL report publications, as well as abstracts and bibliographic information for publications in peer-reviewed journal articles and conferences. Older publications by Dr. Collette before he founded the MSDL are also included. Where allowed by copyright, full text downloaded or pre-prints of articles are also provided. Papers where source code and data is provided for provenance will have a link below the abstract to access the code or data. Zotero metadata is also provided for the publications.
Department of Naval Architecture
and Marine Engineering
210 Naval Architecture and Marine Engineering
2600 Draper Dr., Ann Arbor MI 48109
Collette, Matthew, and Atilla Incecik. "An Approach for Reliability-Based Fatigue Design of Welded Joints on Aluminum High-Speed Vessels", Journal of Ship Research 2006 50(1): pp 85-98
Fatigue cracks are an ongoing problem for aluminum high-speed vessels, and preventing fatigue cracks caused by wave loading is expected to be a significant challenge for future aluminum high-speed ferries and military vessels. To aid in this effort, a hot-spot fatigue design approach using first-order reliability methods (FORM) is constructed. Two different limit state functions are investigated, and the accuracy and consistency of the FORM method for the highly nonlinear fatigue limit state equations are evaluated through a comparison with Monte Carlo simulation results. The sensitivity of the resulting safety index to changes in the input variables, and their uncertainties, are presented graphically. The method is compared to existing design standards for four simple structural details.
Downes, John; Collette, Matthew and Atilla Incecik. "Analysis of Hull Girder Strength in the Damaged Condition", in 3rd ASRANet International Colloquium , Glasgow, U.K. 2006
The analysis of Hull Girder strength is an accepted part of the design process. The recent Joint Rules issued by the Classification Societies mandate that the ultimate strength should be assessed. Typically the pure vertical case is considered but more complex cases involving combined bending can be analysed using various methodologies including finite element analysis and progressive collapse moment curvature approaches. The damaged case represents a considerably different challenge to the design condition. Different hull girder loadings and the loss of structural integrity need to be accounted for. This paper aims to address some of the issues arising from the investigation of ultimate longitudinal strength in the damaged condition.
Collette, Matthew; Cooper, Martyn; Mesbahi, Ana and Atilla Incecik. "An integrated reliability, risk analysis, and cost model for preliminary structural design: a module of the SAFETY@SPEED design methodology", in FAST 2005, 2005, St. Petersburg, Russia
Decisions made early in the structural design process of a new high-speed craft can significantly effect the operational safety, the build cost, and the through life operating cost of the vessel. Recent research in the areas of structural reliability, risk analysis, and "design for safety" have addressed parts of the structural risk and cost issues, however, practical design methods for naval architects have still lagged behind. This paper describes the development of an interlinked reliability, risk, and cost model for the preliminary structural design of high-speed craft, developed as part of the European Union Safety@Speed research project. This model was developed to give the designer feedback on the actual risk and cost levels associated with potential design solutions early in the design process. The model uses first-order reliability techniques in conjunction with risk contribution trees to evaluate risk. Fatigue strength, local ultimate strength behaviour, and global ultimate strength behaviour are all examined. Links with other risk models from the Safety@Speed project allow the effects of human factors and route environment to be considered as well. Cost is determined from material mass, construction complexity, and predicted levels of in-service fatigue and buckling damage. Trial applications with the approach are detailed, along with recommendations for future improvements to allow the growing field of structural reliability techniques to interface with risk and cost assessment techniques.
Collette, M., 2005. Strength and Reliability of Aluminium Stiffened Panels. Newcastle, United Kingdom: University of Newcastle upon Tyne.
The objective of this thesis is to develop improved reliability-based structural design methods for stiffened aluminium panels in high-speed vessels. In recent years aluminium high-speed vessels have grown larger and are venturing into increasingly hostile operating environments. Designing such vessels requires structural prediction techniques capable of producing a light structure with high confidence in its strength and safety. However, current aluminium marine structural design methods are largely simple modifications of steel methods that do not account for all of the differences between aluminium and steel. This thesis presents new reliability-based design techniques for the ultimate strength and fatigue strength of aluminium stiffened panels. A review of recent aluminium high-speed vessels is made, along with their structural configuration and hydrodynamic loading. Structural reliability techniques are discussed. Existing prediction methods, including marine approaches and civil engineering design codes are compared to experimental results for the compressive collapse of aluminium plates and stiffened panels. A modified technique is proposed to model the compressive collapse of such panels. The tensile response of welded aluminium structures is investigated, including the influence of strain concentration in the reduced-strength region around welds. Reliability formulations are presented and discussed for ultimate strength predictions. A reliability based hot-spot S-N fatigue prediction method is developed for welded connections, including an analysis of the material and prediction uncertainty values and a comparison with existing design codes. Discussion of extending the fatigue prediction techniques to include through-life initiation-propagation fatigue models are presented, along with a simple trial application to butt welds. Conclusions from the techniques investigated are presented, and potential future developments are discussed.
Paik, JK; van der Veen; S, Duran, A and Matthew Collette. "Considering aluminum welded panel structures for aerospace, marine and land-based applications: a comparison of ultimate compressive strength design methods", in Proceedings of PRADS'2004, 9th International Symposium on Practical Design of Ships and other Floating Structures , Vol.2, 2004, pp.727-735.
The high strength-to-weight advantage of aluminum alloys have made it the material of choice for building airplanes and sometimes for the construction of land-based structures. For marine applications, the use of high-strength, weldable and corrosion resistant aluminum alloys have made it the material of choice for weight sensitive applications such as fast ferries, military patrol craft, luxury yachts and to lighten the top-sides of offshore structures and cruise ships. And while, over the last two decades, the ultimate limit state (ULS) design approach has been widely adopted in the design of aerospace and land-based (steel) structures, it is just recently being considered as a basis for the structural design and strength assessment of ships and offshore structures. Practical ULS methods or design codes are available in the aerospace and civil engineering industries, but they are just now being developed for use by the marine industry. The present paper compares some useful ULS methods adopted for the design of aerospace, marine and land-based aluminum structures. A common practice for aerospace, marine and civil engineering welded stiffened panel applications is discussed.
Collette, Matthew, and Atilla Incecik. "An Investigation of the Options for Evaluating the Compressive Strength and Reliability of Aluminium Stiffened Panels", in FAST 2003, 2003, Ischia, Italy, Session B2, pp.17-24
Despite growing interest in aluminium as a structural material for marine structures, there is still significant uncertainty surrounding the determination of the ultimate compressive strength and reliability of welded aluminium stiffened panels. The aim of this paper is to review the various options for predicting the ultimate compressive strength and reliability of these panels. Computationally efficient means that would be suitable for use during preliminary design are specifically investigated. Previous compressive tests carried out on aluminium panels are reviewed. The experimentally determined collapse strengths are compared to the collapse strengths predicted by several ultimate strength formulations, including aluminium design codes and formulations originally developed for steel stiffened panels. An example is then presented showing how these types of expressions can be incorporated into a reliability analysis, using first-order reliability principles. The accuracy of the first-order formulation is compared with simulation results.