Searched for: subject:"fatigue"
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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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Slot, H. (author), Matthews, D. (author), Schipper, D. (author), van der Heide, E. (author)
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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Maljaars, J. (author), Misiek, T. (author)
Many steel rope systems are subjected to fluctuating tensile loads and therefore can fail due to fatigue. Available fatigue test data indicate that rope diameter, mean stress, socket type, lay angle and rope length influence the fatigue resistance. Most of the tests were terminated before full failure of the ropes. This paper shows that the test...
article 2021
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Hengeveld, S.T. (author), Vervuurt, A.H.J.M. (author), Maljaars, J. (author)
conference paper 2021
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Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author)
This study presents calibration and validation of a cohesive extended finite element model for fatigue crack propagation in ductile materials. The approach relies on a separation between plasticity around the crack tip and fatigue crack growth at the crack tip such that the influence of plasticity on fatigue driving forces is predicted. This...
article 2021
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van de Ven, H. (author), Hulsegge, G. (author), de Korte, E.M. (author), Burdorf, A. (author), Oude Hengel, K.M. (author)
Objectives This study aimed to estimate acute effects of roster characteristics on fatigue and sleep quality and investigated whether these effects differed by individual characteristics. Methods Using an ecological measurement assessment survey, fatigue and sleep quality were daily measured among 223 shift workers for up to eight weeks. A...
article 2021
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Maljaars, J. (author), Euler, M. (author)
Bolts and bolted connections are frequently used in civil engineering steel structures. This paper presents a meta study where a few thousand fatigue tests on these elements are evaluated. The evaluation reveals that current specifications in design standards need updating to account for the relevant stress parameter and production methods. This...
article 2021
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Piil, J.F. (author), Kingma, B.R.M. (author), Morris, N.B. (author), Christiansen, L. (author), Ioannou, L.G. (author), Flouris, A.D. (author), Nybo, L. (author)
article 2021
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de Wind, A. (author), Beckers, D. (author), Nijp, H.H. (author), Hooftman, W. (author), de Boer, A.G.E.M. (author), Geurts, S.A.E. (author)
article 2021
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Leonetti, D. (author), Maljaars, J. (author), Snijder, B. (author)
Probabilistic fatigue life prediction models of welded steel joints are often used to estimate the level of safety, which is given in terms of the probability of failure or the reliability index as a function of the applied load cycles. Prediction models based on fracture mechanics allow taking into account the effect of inspections on the...
conference paper 2021
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Naafs, J.C. (author), Marchal, J.P. (author), Verkerk, P.H. (author), Fliers, E. (author), van Trotsenburg, A.S.P. (author), Zwaveling-Soonawala, N. (author)
Context. Central congenital hypothyroidism (CH) requires lifelong medical treatment. The majority of children with central CH have multiple pituitary hormone deficiencies (MPHD), but in some cases central CH is isolated. Most pituitary hormone deficiencies are associated with impaired health-related quality of life (HRQoL). However, studies on...
article 2021
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As, S.van (author), Beckers, D.G.J. (author), Veling H., (author), Hooftman, W. (author), Kompier, M.A.J. (author), Geurts, S.A.E. (author)
Objective.
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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Phogat, R. (author), González Díez, N. (author), Smeulers, J.P.M. (author), Casalino, D. (author), Avallone, F. (author)
Impeller rotation, vortex shedding, secondary flows or a combination of these phenomena can lead to the generation of acoustic waves in the compressor cascade causing dynamic pressure loading on the impeller. When the eigenfrequency and eigenmode shape of the acoustic mode match with the structural ones of the impeller, high fatigue stresses and...
conference paper 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
Searched for: subject:"fatigue"
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