Searched for: subject:"Fracture"
(1 - 20 of 112)

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Bertolo, V.M. (author), Jiang, Q. (author), Walters, C.L. (author), Pupovich, V.A. (author)
One of the main challenges in applying thick-section high-strength steels (HSS) at arctic condition in offshore and maritime industry is to maintain a sufficient level of toughness to prevent brittle failure. An aspect that requires special attention is the through-thickness microstructural variation which may result in different local...
conference paper 2020
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Leonetti, D. (author), Maljaars, J. (author), Snijder, H.H. (author)
article 2020
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Heidari, H. (author)
Considerable work has been done on the modelling of fracture and necking for accidents in the maritime and offshore industry, but very little has been done to find the crack orientation during this failure. Such information will be required in future analyses which use the eXtended Finite Element Method (XFEM), rather than the element deletion...
conference paper 2020
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Maljaars, J. (author), Tang, L. (author)
Crack closure effects during fatigue crack growth have been studied by many researchers with the finite element method, but appears difficult to accurately predict. Although quantification of crack closure may be a bridge too far, finite element models may help explaining observations from tests and give insight into trends. This paper studies...
article 2020
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Coppejans, O.J. (author), Walters, C.L. (author)
Measurement of the fracture toughness of steel is important for the assurance of the safety of ships and offshore structures, especially when these structures are made of thick sections and/ or applied in cold environments. One key factor that will affect the determination of the fracture toughness is a pop-in, which is a short event in which...
conference paper 2019
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Park, S.J. (author), Lee, K. (author), Choung, J. (author), Walters, C.L. (author)
This study deals with ductile fracture prediction of a marine steel using new damage functions. The stress triaxiality and Lode angle are known to be governing parameters on the ductile fracture. Recent research has reported that loading path is also one of the important parameters. A three-dimensional fracture strain surface for EH36 steel was...
article 2018
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Maljaars, J. (author), Bonet, E. (author), Pijpers, P.J.M. (author)
Steel orthotropic decks in bridges and ferries have shown to be prone to fatigue cracking. A typical fatigue crack observed in these structures initiates at the root of the weld between the deck plate and stringer and grows into the deck plate. Due to limited fatigue test data available and the deviating characteristics of this type of crack as...
article 2018
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van Es, S. (author), Slot, H. (author), Steenbergen, H. (author), Maljaars, J. (author), Pijpers, R. (author)
In Memoriam of Prof. Dr. Bernt Johansson. The use of high-strength steels (HSS, 460 < fy ≤ 700 MPa) and particularly very high-strength steels (VHSS, fy > 700 MPa) is limited in steel structures in civil and offshore engineering. This is due to a lack of experience in structures made of these materials and a lack of understanding of the...
article 2018
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Candela, T. (author), Wassing, B. (author), Heege, J.T. (author), Buijze, L. (author)
The sustainability of geothermal fields is based on a paradox. On one side, fractures are targeted on heat-flow improvement, and on the other side, the same fractures are avoided because of induced seismicity risk. In this context, we developed analytical approaches for estimating (1) thermo–poro-elastic stresses in a fractured geothermal system...
article 2018
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Hashemi, B. (author), Maljaars, J. (author), Leonetti, D. (author), Snijder, H.H. (author)
Reliability analysis is a crucial phase in assessing the safety status of new and existing structures. One of its applications is to predict the fatigue life of fatigue prone details. Two models are used to formulate the fatigue limit state: S-N curves in combination with Palmgren-Miner damage accumulation rule and linear elastic fracture...
article 2017
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Attema, T. (author), Kosgodagan Acharige, A. (author), Morales-Napoles, O. (author), Maljaars, J. (author)
A probabilistic model is developed to investigate the crack growth development in welded details of
article 2017
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Leonetti, D. (author), Hashemi, B. (author), Allaix, D.L. (author), Maljaars, J. (author)
This paper investigates the differences in the predicted fatigue life of transverse butt weld joints and cover-plated beams considering statistically based fitting methods on fatigue test data and comparing the results with the S-N relation proposed in international standards. The test data fitting are performed by employing the Least Square...
conference paper 2017
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Voormeeren, L.O. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author)
The last decade has seen a growing interest in cohesive zone models for fatigue applications. These cohesive zone models often suffer from a lack of generality and applying them typically requires calibrating a large number of model-specific parameters. To improve on these issues a new method has been proposed in this paper based on the Thick...
article 2017
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Antropov, A. (author), Lavrov, A. (author), Orlic, B. (author)
Cap-rock integrity is of paramount importance during injection and subsequent long-term storage of CO2 in the subsurface. Preexisting (natural) and man-induced fractures in the cap rock represent potential flow paths out of the storage formation. In this study, a first-order semi-analytical model of flow through a vertical fracture penetrating...
conference paper 2017
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Copppejans, O.J. (author), Walters, C.L. (author)
The local approach to modelling ductile tearing is a useful technique to give insight into fracture mechanics. However, applications of the local approach have been stymied by the high cost of finding the parameters that characterize it because of the number of specimens and expensive post-processing that the testing requires. In this paper, a...
conference paper 2017
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Maljaars, J. (author)
handrail. This paper demonstrates that aluminium alloys are in principle also suited for heavy loaded structures, such as decks of traffic bridges and helicopter landing platforms. Recent developments in fatigue research is discussed and future research, required for full application of aluminium in heavy loaded structures is identified. The...
conference paper 2016
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Martin, A.H. (author), de los Reyes Jiménez, M.L. (author), Pouvreau, L. (author)
Partial replacement of milk proteins with plant proteins is a challenge due to the reported negative effect on physical and sensory properties. Understanding of how the mechanical properties of acidified milk gels can be restored when 30% casein is replaced with soy proteins is therefore explored. Mixtures of sodium caseinate (CAS) and soy...
article 2016
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Vegt, I. (author)
Concrete is commonly used in protective and civil structures, like tunnels and storage buildings. For the design and reliable safety assessment of such structures it is very important to know the behaviour of concrete under static loading conditions as well as under impulsive loading. To understand the behaviour of concrete under impulsive...
doctoral thesis 2016
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Turkenburg, D. (author), Hartley, J. (author), Fischer, H. (author), Roebroeks, G. (author), Ward, C. (author), Gielen, S. (author)
conference paper 2016
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ter Heege, J.H. (author)
The occurrence and properties of natural faults and fractures in geothermal reservoirs are key in determining reservoir flow properties, and thereby the performance of geothermal doublets placed in fractured reservoirs or in the vicinity of fault zones. In this paper, an analytical model is presented that describes the 3D non-isotropic...
conference paper 2016
Searched for: subject:"Fracture"
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