Publikasjoner fra CRIStin - NTNU
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An adaptive harmonic polynomial cell method with immersed boundaries: Accuracy, stability, and applications
(Peer reviewed; Journal article, 2021)We present a 2D high-order and easily accessible immersed-boundary adaptive harmonic polynomial cell (IB-AHPC) method to solve fully nonlinear wave-structure interaction problems in marine hydrodynamics using potential-flow ... -
Effect of the stress-strain state on the path of quasi-cleavage hydrogen-assisted cracking in low-carbon steel
(Peer reviewed; Journal article, 2021)Сonflicting data on the effect of the stress-strain state on the shape and path of quasi-cleavage cracks in hydrogen-embrittled steels and iron have been reported in the literature recently. However, this issue is important ... -
On the role of pre-exposure time and corrosion products in stress-corrosion cracking of ZK60 and AZ31 magnesium alloys
(Peer reviewed; Journal article, 2021)Pre-exposure of Mg alloys to corrosive media causes their embrittlement, which has been long associated with diffusible hydrogen penetrating into the metal. The time of the pre-exposure was suggested to promote embrittlement ... -
A comparative study of fully coupled and de-coupled methods on dynamic behaviour of floating wind turbine drivetrains
(Peer reviewed; Journal article, 2021)Traditionally, drivetrain responses are obtained by a de-coupled analysis, which first involves a global analysis with a simplified representation of the drivetrain, followed by a detailed analysis of the drivetrain with ... -
The processing route towards outstanding performance of the severely deformed Al–Mg–Mn-Sc-Zr alloy
(Journal article, 2021)Aiming at obtaining the enhanced mechanical properties profile for lightweight applications, bulk billets of the commercial 1570C aluminium alloy (Al–5Mg-0.18Mn-0.20Sc-0.08Zr, wt. %) with nanosized aluminides of transition ... -
The relevance of recoil and free swimming in aquatic locomotion
(Peer reviewed; Journal article, 2021)The study of the free swimming of undulating bodies in an otherwise quiescent fluid has always encountered serious difficulties for several reasons. When considering the full system, given by the body and the unbounded ... -
Real-time deterministic prediction of wave-induced ship responses based on short-time measurements
(Peer reviewed; Journal article, 2021)This paper studies real-time deterministic prediction of wave-induced ship motions using the autocorrelation functions (ACFs) from short-time measurements, namely the instantaneous ACFs. The Prolate Spheroidal Wave Functions ... -
Dual roles of pearlite microstructure to interfere/facilitate gaseous hydrogen-assisted fatigue crack growth in plain carbon steels
(Peer reviewed; Journal article, 2021)Fatigue crack growth of two carbon steels with different pearlite volume fractions were studied in pressurized gaseous hydrogen environment. Notably, pearlite was found to mitigate hydrogen-assisted fatigue crack acceleration. ... -
Acoustic Emission during Initiation of a Shear Band in a Metallic Glass as a Method for Verification of the Existence of Scale Invariance
(Peer reviewed; Journal article, 2021)Using the acoustic emission method, we have determined the probability density distribution function of shear band lengths in a metallic glass and demonstrated its independence of stoichiometric composition of glass and ... -
Inhibiting stress corrosion cracking by removing corrosion products from the Mg-Zn-Zr alloy pre-exposed to corrosion solutions
(Peer reviewed; Journal article, 2021)Magnesium and its alloys are susceptible to stress-corrosion cracking (SCC), which can manifest itself during the slow-strain rate tensile (SSRT) testing in air if the specimens were pre-exposed to corrosive media. This ... -
Estimation of autocorrelation function and spectrum density of wave-induced responses using prolate spheroidal wave functions
(Peer reviewed; Journal article, 2021)Predicting the wave-induced response in the near-future is of importance to ensure safety of ships. To achieve this target, a possible method for deterministic and conditional prediction of future responses utilizing ... -
Tuning of transfer functions for analysis of wave–ship interactions
(Peer reviewed; Journal article, 2021)Transfer functions are often used together with a wave spectrum for analysis of wave–ship interactions, where one application addresses the prediction of wave-induced motions or other types of global responses. This paper ... -
Scaling laws for the water entry of a three-dimensional body
(Peer reviewed; Journal article, 2021)The present experimental investigation is a new way of conducting tests on model scale and of interpreting the results for the water entry of a free-falling conical body shape entrapping an air cavity. A three-dimensional ... -
Indirect Measurements of Added-Wave Resistance on an In-Service Container Ship
(Chapter, 2021)This paper investigates a semi-empirical model used to estimate added-wave resistance on a ship sailing in waves. The model relies on measurements from a continuous monitoring system, and produces an estimate - the indirect ... -
Spatio-temporal variation in sea state parameters along virtual ship route paths
(Peer reviewed; Journal article, 2021)The article presents a study investigating the level of variation in sea state parameters encountered by sailing ships crossing the oceans. The sea state parameters have been obtained from a reanalysis, in this case the ... -
Novel method for in situ damage monitoring during ultrasonic fatigue testing by the advanced acoustic emission technique
(Peer reviewed; Journal article, 2021)Ultrasonic fatigue testing (USFT) is an effective method for the rapid characterisation of the high cycle fatigue properties of structural materials. However, the process of initiation and progression of fatigue damage ... -
A phenomenological model of deformation twinning kinetics
(Peer reviewed; Journal article, 2021)Inspired by the classical Olson and Cohen model for martensitic phase transformations, a simple phenomenological model of the deformation twinning kinetics is proposed with account for twin-twin interactions. The model was ... -
On the role of added mass and vorticity release for self-propelled aquatic locomotion
(Peer reviewed; Journal article, 2021)Aquatic locomotion of a deformable body from rest up to its asymptotic speed is given by the unsteady motion which is produced by a series of periodic reactions dictated by the body configuration and by the style of swimming. ... -
The fundamental difference between cleavage and hydrogen-assisted quasi-cleavage in ferritic materials revealed by multiscale quantitative fractographic and side surface characterization
(Peer reviewed; Journal article, 2021)The fracture surfaces and cracks in technically pure iron, Fe-2.5% Si alloy and low-carbon steel grade S235JR produced by quasi-cleavage (QC) hydrogen-assisted cracking (HAC) as well as by true cleavage (TC) were studied ... -
Effect of Hydrogen Concentration and Strain Rate on Hydrogen Embrittlement of Ultra-Fine-Grained Low-Carbon Steel
(Chapter, 2021)During the last few decades, keen attention has been paid to the advanced steels with the ultra-fine-grained (UFG) microstructure manufactured by severe plastic deformation (SPD) techniques. Although these materials often ...
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