Institutt for konstruksjonsteknikk
Recent Submissions
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A spatial coupling model to study dynamic performance of pantograph-catenary with vehicle-track excitation
(Peer reviewed; Journal article, 2021)In the high-speed railway industry, the pantograph-catenary system is responsible to provide continuous electric energy for the high-speed train. The pantograph-catenary system suffers multiple impacts from the complex ... -
Effect of side branch flow upon physiological indices in coronary artery disease
(Peer reviewed; Journal article, 2020)Recent efforts have demonstrated the ability of computational models to predict fractional flow reserve from coronary artery imaging without the need for invasive instrumentation. However, these models include only larger ... -
Contact Wire Irregularity Stochastics and Effect on High-speed Railway Pantograph-Catenary Interactions
(Peer reviewed; Journal article, 2020)In high-speed rail operations, contact wire irregularity (CWI) in a catenary is a common disturbance to the pantograph-catenary interaction performance, which directly affects the quality of current collection. To describe ... -
Effective Measures to Improve Current Collection Quality for Double Pantographs and Catenary Based on Wave Propagation Analysis
(Peer reviewed; Journal article, 2020)The pantograph installed on the train roof is responsible for collecting the electrical energy via the sliding contact with the catenary constructed along the railroad. To enhance the carrying capacity of the high-speed ... -
A methodology to study high-speed pantograph-catenary interaction with realistic contact wire irregularities
(Peer reviewed; Journal article, 2020)In high-speed rail operations, the irregularity of the overhead system is a typical disturbance that affects the pantograph-catenary interaction performance. The existing methods, which treat the contact wire irregularities ... -
A novel methodology for design optimization of heat recovery steam generators with flow-induced vibration analysis
(Peer reviewed; Journal article, 2021)Design of compact, lightweight, and robust heat recovery steam generators (HRSGs) is important for the implementation of offshore bottoming cycles. In this work, a novel methodology integrating flow-induced vibration ... -
On the effect of pilot holes on the mechanical behaviour of flow-drill screw joints. Experimental tests and mesoscale numerical simulations
(Peer reviewed; Journal article, 2021)This research work investigated in detail the mechanical performance of a flow-drill screw connection of two aluminium plates with and without pilot holes. An extensive experimental campaign involving material and joint ... -
A critical evaluation of topology optimization results for strut‐and‐tie modeling of reinforced concrete
(Peer reviewed; Journal article, 2020)Defining a suitable truss model is one of the most important steps of applying the strut‐and‐tie modeling (STM) method to design D‐regions in reinforced concrete (RC) structures. The truss model is a discrete representation ... -
Automated optimization-based generation and quantitative evaluation of Strut-and-Tie models
(Peer reviewed; Journal article, 2020)Strut-and-Tie modelling (STM) is a well-known approach to design D-regions in reinforced concrete structures. Because the STM method is based on lower-bound analysis, finding a suitable truss-analogy model is the most ... -
Non-proportional loading in sequentially linear solution procedures for quasi-brittle fracture: A comparison and perspective on the mechanism of stress redistribution
(Peer reviewed; Journal article, 2020)Sequentially linear solution procedures provide a robust alternative to their traditional incremental-iterative counterparts for finite element simulation of quasi-brittle materials. Sequentially linear analysis (SLA), one ... -
Two solution strategies to improve the computational performance of sequentially linear analysis for quasi‐brittle structures
(Peer reviewed; Journal article, 2020)Sequentially linear analysis (SLA), an event‐by‐event procedure for finite element (FE) simulation of quasi‐brittle materials, is based on sequentially identifying a critical integration point in the FE model, to reduce ... -
A phase-field model for fracture of unidirectional fiber-reinforced polymer matrix composites
(Peer reviewed; Journal article, 2020)This study presents a crack phase-field approach for anisotropic continua to model, in particular, fracture of fiber-reinforced matrix composites. Starting with the variational formulation of the multi-field problem of ... -
Integration of polarized spatial frequency domain imaging (pSFDI) with a biaxial mechanical testing system for quantification of load-dependent collagen architecture in soft collagenous tissues
(Peer reviewed; Journal article, 2020)Collagen fiber networks provide the structural strength of tissues, such as tendons, skin and arteries. Quantifying the fiber architecture in response to mechanical loads is essential towards a better understanding of the ... -
Modeling the porous and viscous responses of human brain tissue behavior
(Peer reviewed; Journal article, 2020)The biomechanical characterization of human brain tissue and the development of appropriate mechanical models is crucial to provide realistic computational predictions that can assist personalized treatment of neurological ... -
Biomechanical characterization of a chronic type a dissected human aorta
(Peer reviewed; Journal article, 2020)Aortic dissection is one of the most lethal cardiovascular diseases. A chronic Type A (Stanford) dissected aorta was retrieved for research from a 73-year-old male donor without diagnosed genetic disease. The aorta presented ... -
Rate-dependent mechanical behaviour of semilunar valves under biaxial deformation: From quasi-static to physiological loading rates
(Peer reviewed; Journal article, 2020)In this study we investigate the rate-dependency of the mechanical behaviour of semilunar heart valves under biaxial deformation, from quasi-static to physiological loading rates. This work extends and complements our ... -
Mechanics of Porcine Heart Valves’ Strut Chordae Tendineae Investigated as a Leaflet–Chordae–Papillary Muscle Entity
(Peer reviewed; Journal article, 2020)Proper blood flow through the atrioventricular heart valves (AHVs) relies on the holistic function of the valve and subvalvular structures, and a failure of any component can lead to life-threatening heart disease. A ... -
An efficient and accurate method for modeling nonlinear fractional viscoelastic biomaterials
(Peer reviewed; Journal article, 2020)While experimental evidence indicates that the mechanical response of most tissues is viscoelastic, current biomechanical models in the computational community often assume hyperelastic material models. Fractional viscoelastic ... -
Detection, segmentation, simulation and visualization of aortic dissections: A review
(Peer reviewed; Journal article, 2020)Aortic dissection (AD) is a condition of the main artery of the human body, resulting in the formation of a new flow channel, or false lumen. The disease is usually diagnosed with a computed tomography angiography scan ...
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