Fatigue life estimation of explosive cladded transition joints with the use of the spectral method for the case of a random sea state

Böhm, Michał; Kowalski, Mateusz

doi:10.1016/j.marstruc.2020.102739

Cited by 38 publications

(26 citation statements)

References 15 publications

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“…This choice resulted from the fact that this form was less demanding. There were measurements of fatigue with the following stress concentrator [ 42 , 49 ]. During testing, the specimen was placed in the collet of the equipment ( Figure 12 b).…”

Section: Methodsmentioning

confidence: 99%

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

et al. 2020

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This article is divided into two parts—in the first part, authors inform about their testing device that enables the acquisition of results from uniaxial and multiaxial fatigue tests (the bending−torsion combination). We present the approaches used during designing and building the testing device. The direct implementation of the research in the second part will concentrate on implementing the acquired results for the frame design of a vehicle worked out by the authors. The three-wheeled vehicle has the front steered wheel suspended in an unconventional way. This original design can cause an increased load on the vehicle’s frame. This can be apparent mainly during driving through curves. Therefore, the fatigue curves of the tested material (EN AW 6063) will be implemented from the point of view of its usability in operation. A vehicle frame is most often loaded by bending and torsion. The authors assess the influence of welding on the fatigue life of this unique unconventional vehicle by determining the fatigue curves of the material for its production. The stresses achieved on the test specimens fully correspond to the load of the frame (in welds) during its operation.

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Section: Methodsmentioning

confidence: 99%

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

et al. 2020

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“…Knowledge of the weather conditions in the context of marine engineering applications is often a key point for structural safety, and also for people’s comfort in the case of ships in navigation. In this context, it is very important to have a reliable estimation of the sea spectrum because it has a significant influence on ship motion [ 1 , 2 ], but also on the forces to which ships and offshore structures are subject [ 3 ]. Moreover, it constitutes the input of the procedures for the estimation of the sea parameters which are then used for several purposes such as fatigue lifetime estimation [ 3 ], or to avoid ship dynamic instabilities [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, it is very important to have a reliable estimation of the sea spectrum because it has a significant influence on ship motion [ 1 , 2 ], but also on the forces to which ships and offshore structures are subject [ 3 ]. Moreover, it constitutes the input of the procedures for the estimation of the sea parameters which are then used for several purposes such as fatigue lifetime estimation [ 3 ], or to avoid ship dynamic instabilities [ 4 ]. Consequently, different approaches were proposed in the literature to estimate the sea features, starting from either onboard measurements (e.g., ship motion [ 5 , 6 , 7 , 8 , 9 ]) or time signals of wave level.…”

Section: Introductionmentioning

confidence: 99%

Sea Spectral Estimation Using ARMA Models

Berardengo

Rossi

Crenna

2021

Sensors

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This paper deals with the spectral estimation of sea wave elevation time series by means of ARMA models. To start, the procedure to estimate the ARMA coefficients, based on the use of the Prony’s method applied to the auto-covariance series, is presented. Afterwards, an analysis on how the parameters involved in the ARMA reconstruction procedure—for example, the signal time length, the number of poles and data used—affect the spectral estimates is carried out, providing evidence on their effect on the accuracy of results. This allowed us to provide guidelines on how to set these parameters in order to make the ARMA model as accurate as possible. The paper focuses on mono-modal sea states. Nevertheless, examples also related to bi-modal sea states are discussed.

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“…The tests conducted under the controlled force signal revealed significant ratcheting phenomena (a progressive cyclic increase in the strain mean value) at lower fatigue life regime. Böhm et al [36] tested structural transition joint cladding consisting of four layers of A5083, A1050, Ti Gr. 1, and Grade D steel, under a random force signal applied in the perpendicular direction to the bond interface.…”

Section: Introductionmentioning

confidence: 99%

Fatigue failure analysis of three-layer Zr–Ti/Zr–Steel composite plates: an insight into the evolution of cracks initiated at the interfaces

Karolczuk

Carpinteri

Robak

et al. 2020

Archiv.Civ.Mech.Eng

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Initiation and evolution of fatigue cracks at the interfaces in three-layer Zr–Ti/Zr–Steel composites is herein examined by in situ optical microscopy for the first time. Specimens cut out from three composite plates comprising Zr 700, Ti Gr. 1, and P265GH steel layers have been subjected to uniaxial fatigue cyclic loading. It is found that mechanical property mismatch between layers and defects at the interfaces can reduce the fatigue life of composite plates. An insight into the evolution of cracks initiated at the interfaces reveals that (1) most of the cracks grow into adjacent layers along two distinct planes, and (2) these cracks could lead to the fatigue failure of composites. One of these planes coincides with the adiabatic shear band orientation found in Ti Gr. 1 and Zr 700 layers. The interfaces in multilayer metallic composite could have excellent fatigue strength depending on their structural properties.

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Fatigue life estimation of explosive cladded transition joints with the use of the spectral method for the case of a random sea state

Cited by 38 publications

References 15 publications

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

Sea Spectral Estimation Using ARMA Models

Fatigue failure analysis of three-layer Zr–Ti/Zr–Steel composite plates: an insight into the evolution of cracks initiated at the interfaces

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