Searched for: subject:"2015%5C%2BUrbanisation"
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Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author)
A numerical model for corrosion pit propagation under mechanical loading is presented. The level set method is used for corrosion front tracking and also enables the domain to be split into a solid and a pit domain. In the pit the diffusion of atoms originating from the dissolution process occurring at the pit front is simulated. The model is...
article 2021
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Cornelissen, R. (author), Maljaars, J. (author), Hofmeyer, H. (author)
Curved aluminium extrusions are applied in a wide range of industrial applications. Because extrusions are initially straight, an additional process is required to curve the product. Undesired wrinkling of the plate part at the inner radius is frequently observed during the curving process. Wrinkling has already been extensively studied for the...
article 2021
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Luijters, I. (author), Maljaars, J. (author), Wijte, S. (author)
The effect of embedding in concrete on the fatigue performance of steel reinforcement bars is not evident. Some test series provided in literature demonstrate a higher fatigue resistance of embedded bars as compared to bars in air, whereas others provide a lower resistance. In addition, debate exists on the mechanisms behind the difference...
article 2021
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Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author)
article 2021
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Slot, H.M. (author), Nicoreac, M. (author), Maljaars, J. (author)
Rolled steel plates and sections are often applied in structures in such a way that the principal load direction corresponds with the rolling direction. Examples are beams, arches, or pylons of bridges, supporting beams of ship decks, and the main elements of crane structures. However, some types of structure are subjected to a multiaxial stress...
article 2020
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Leonetti, D. (author), Snijder, H.H. (author), Maljaars, J. (author)
This present paper concerns the application of probabilistic fatigue life prediction models based on S–N curves aiming at the estimation of the safety level for a nonload carrying cruciform joint. The safety level is expressed in terms of the reliability index as a function of the number of applied cycles. Estimating the reliability of a...
article 2020
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Maljaars, J. (author)
Fatigue verification of bridge structures requires information on the loads induced by heavy vehicles, which can be obtained from weigh in motion measurement (WIM) systems. The current fatigue load models applied in Europe are based on traffic load measurements in 1986. This paper evaluates the appropriateness of these models for today’s traffic...
article 2020
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Leonetti, D. (author), Maljaars, J. (author), Snijder, H.H. (author)
article 2020
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Dragt, R.C. (author), Hengeveld, S.T. (author), Maljaars, J. (author)
Load sequence effects in fatigue crack growth, such as retardation and acceleration due to a large overload (OL) and underload (UL), can dramatically change the (remaining) fatigue life. These effects can be determined using analytical and numerical tools, often trading accuracy for a steep increase in required calculation time. This paper...
article 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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Pijpers, R.J.M. (author), Verdenius, S.A. (author), Abspoel-Bukman, L.M. (author), Maljaars, J. (author)
This experimental study considers load sequence effects in fatigue crack growth in coupon specimens and in element specimens. The coupon specimens were standard edge crack configurations cyclically loaded under four point bending on base metal and welds, whereas the element specimens were full-scale axially loaded tubular joints. Whereas load...
article 2020
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Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author)
Structures are subjected to cyclic loads that can vary in direction and magnitude, causing constant amplitude mode I simulations to be too simplistic. This study presents a new approach for fatigue crack propagation in ductile materials that can capture mixed-mode loading and overloading. The extended finite element method is used to deal with...
article 2019
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Xu, Q. (author), Hofmeyer, H. (author), Maljaars, J. (author)
A multi-scale approach is proposed to simulate the fire resistance of panels used in façades of buildings: Using existing models, fire is modelled by CFD, its effects in the façade found via a thermodynamical model. Then a thermomechanical model predicts the mechanical behaviour, using linear elastic springs for the connections holding the...
conference paper 2019
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Annan, R. (author), Bechtold, M. (author), Friedrich, H. (author), Maljaars, J. (author), Misiek, Th. (author), Paschen, M. (author)
During the ongoing revision of EN 1993-1-11 “Design of structures with tension components” the
conference paper 2019
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Hashemi, B. (author), Maljaars, J. (author), Snijder, H.H. (author)
In order to design structural details of bridges for fatigue, the current version of the Eurocode for steel structures recommends partial factors for fatigue resistance based on the consequences of failure and on the maintenance method. The safe-life method is used for details where local formation of cracks could rapidly lead to failure or for...
conference paper 2019
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Nagy, W. (author), de Backer, H. (author), Thierens, G. (author), Blontrock, H. (author), van Bogaert, P. (author), Reynaert, K. (author), Maljaars, J. (author)
Orthotropic Steel Decks (OSDs) are widely used in long span bridges because of their extremely light weight when compared to their load carrying capacity. These deck types typically consist of a grillage of closed trapezoidal longitudinal stiffeners and transverse web stiffeners, welded to a deck plate. As a result, fatigue problems occur due to...
conference paper 2019
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Leonetti, D. (author), Snijder, H.H. (author), Maljaars, J. (author)
Two basic procedures are currently available to determine the critical condition of a flawed structure, at which unstable crack extension may occur. The first method based on elastic-plastic fracture mechanics is accurate but requires a time consuming elastic-plastic finite element analysis. The second method estimates the critical condition...
conference paper 2019
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Leonetti, D. (author), Maljaars, J. (author), Snijder, H.H. (author)
Before bolts were invented, hot-riveting was employed as technological process to produce built-up structural members of steel structures. Nowadays, these structures being still in service and susceptible to fatigue failure,they need to be assessed for their remaining service life. To estimate the fatigue life distribution of riveted connections...
article 2019
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Annan, R. (author), Bechtold, M. (author), Friedrich, H. (author), Maljaars, J. (author), Misiek, T. (author), Paschen, M. (author)
As part of the ongoing revision of EN 1993-1-11 “Design of structures with tension components”, the current fatigue design rules have been subjected to a critical review. This has resulted in modifications and amendments, including the adjustment of several parameters. This paper provides an introduction to as well as background information on...
article 2019
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Maljaars, J. (author), Leonetti, D. (author), Maas, C. (author)
Many existing steel bridges are constructed by using hot-driven steel rivets as fasteners. It is known that the fatigue strength of these joints depends on their geometry, since it affects the load transfer mechanism and, therefore, the severity of the stress concentration. Attempts have been taken in the past to provide the characteristic...
article 2019
Searched for: subject:"2015%5C%2BUrbanisation"
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