Dmitry Vysochinskiy

• Noorsumar, Gulshan; Rogovchenko, Svitlana; Robbersmyr, Kjell Gunnar; Vysochinskiy, Dmitry & Klausen, Andreas (2023). Development and Extended Validation of a Lumped Parameter Prediction Model for Analysing Injury Parameters in a Vehicle Crash. I Wagner, Gerd; Werner, Frank; Tuncer, Oren & De Rango, Floriano (Red.), Simulation and Modeling Methodologies, Technologies and Applications. SIMULTECH 2021. Springer. ISSN 978-3-031-23149-0. doi: 10.1007/978-3-031-23149-0_1.
• Noorsumar, Gulshan; Rogovchenko, Svitlana; Vysochinskiy, Dmitry & Robbersmyr, Kjell Gunnar (2023). A Numerical Comparison of Lagrange and Kane’s Method for Modeling and Crashworthiness Assessment of a Modified Vehicle. I Wagner, Gerd; Werner, Frank & De Rango, Floriano (Red.), Simulation and Modeling Methodologies, Technologies and Applications. SIMULTECH 2022. Springer. ISSN 978-3-031-43823-3. s. 156–176. doi: 10.1007/978-3-031-43824-0_9.
• Noorsumar, Gulshan; Rogovchenko, Svitlana; Vysochinskiy, Dmitry & Robbersmyr, Kjell Gunnar (2022). Modeling of Modified Vehicle Crashworthiness using a Double Compound Pendulum. I Wagner, Gerd; Werner, Frank & De Rango, Floriano (Red.), Proceedings of the 12th International Conference on Simulation and Modeling Methodologies, Technologies and Applications. SciTePress. ISSN 978-989-758-578-4. s. 102–111. doi: https:/doi.org/10.5220/0011306100003274. Fulltekst i vitenarkiv Vis sammendrag

  Vehicle crash modeling has been a challenge for researchers for several decades. Occupant injury prevention and prediction is a critical area within vehicle safety design. The modeling of material failure in structural members during a full frontal crash has been presented in this paper. This study presents a Lumped Parameter Model (LPM) with an elastic double compound pendulum replicating the impact kinematics. The model defined using Lagrangian formulation; presents a novel methodology to represent material fracture caused due to heat affected zones or welding in Ultra High Strength Steels (UHSS) in a non-linear crash event. The material fracture leads to rotation of the vehicle; presented in the form of torsional springs in the LPM developed in this study. The Simulink model has been validated with a finite element simulation and shows good correlation to predict parameters crucial to design for occupant protection in a vehicle crash.

• Vysochinskiy, Dmitry & Akhtar, Naureen (2022). On the Influence of Cross-Section Size on Measured Strength of SLM-Produced AlSi10Mg-Alloy. Key Engineering Materials. ISSN 1013-9826. 926, s. 132–140. doi: 10.4028/p-g078sc. Fulltekst i vitenarkiv Vis sammendrag

  The freedom in choice of geometries in additive manufacturing (AM) favors the use of structures with large surface and small cross-section such as lattice structures and thin-walled hollow profiles. On the other hand, the practices of strength testing of metals require a certain bulk of the material to be printed to be able to produce a sample and test material properties. The size of the sample cross section might influence the strength and up to 30% decrease in strength for small struts was reported in the literature. Understanding the influence of the cross-section size on the strength of SLM-produced metal is crucial to be able to relate the strength determined through tensile testing and the strength of an SLM-produced component with complex geometry. This article deals with effect of cross-section size on the measured strength of the SLM-produced AlSi10Mg-alloy. It is demonstrated how the decrease in strength can be explained by the difference between measured and actual cross-section area induced by surface roughness rather than by the difference in microstructure between the samples of different sizes.

• Noorsumar, Gulshan; Rogovchenko, Svitlana; Robbersmyr, Kjell Gunnar & Vysochinskiy, Dmitry (2022). Vehicle crashworthiness performance in frontal impact: Mathematical model using elastic pendulum. Mechanics research communications. ISSN 0093-6413. 124. doi: 10.1016/j.mechrescom.2022.103954. Fulltekst i vitenarkiv Vis sammendrag

  Vehicle occupant injuries due to collisions cause many fatalities every year. Safe vehicle design plays a critical role in averting serious injuries to occupants and vulnerable road users in the event of a crash. In this paper we study a full frontal vehicle crash against a rigid barrier introducing a Lumped Parameter Model (LPM) inspired by the elastic pendulum motion. The model uses polar coordinates to simplify the problem and the governing equations have been defined using Lagrangian formulation. The Simulink model has been validated against Finite Element (FE) data demonstrating good correlation with pitching angle and maximum crush of the vehicle. These parameters are crucial for designing vehicles which efficiently protect occupants.

• Noorsumar, Gulshan; Robbersmyr, Kjell Gunnar; Rogovchenko, Svitlana & Vysochinskiy, Dmitry (2022). An Overview of Data Based Predictive Modeling Techniques Used in Analysis of Vehicle Crash Severity. I Sanfilippo, Filippo; Granmo, Ole-Christoffer; Yildirim Yayilgan, Sule & Bajwa, Imran Sarwar (Red.), Intelligent Technologies and Applications: 4th International Conference, INTAP 2021, Grimstad, Norway, October 11–13, 2021, Revised Selected Papers. Springer. ISSN 978-3-031-10524-1. s. 355–379. doi: 10.1007/978-3-031-10525-8_28. Vis sammendrag

  Accident injury prediction is a crucial constituent to reducing fatalities linked to vehicle crashes. The vehicle development process and road safety planning includes also the injury prediction for occupants and Vulnerable Road Users (VRUs) in a vehicle crash and the identification of the factors responsible for increased traffic collision injuries. This paper reviews the different data-based prediction techniques to modeling a vehicle crash event, crash frequency and crash severity. Machine learning (ML) is a research field which has gained impetus in the recent years and is widely used in different engineering applications; including injury prediction in vehicle collisions. The paper is divided into two major sections; the first section presents an overview of the existing predictive models for estimating injury severity in a crash event to occupants and VRUs and the second section describes the applications of data-based modeling techniques to predict crash frequency in different traffic scenarios. We also discuss possible future applications of data-based modeling techniques in this domain.

• Mahdavipour, Mohammad Ali & Vysochinskiy, Dmitry (2022). Micromechanical Modeling of Corroded Steel Joints under Excessive Plastic Deformations. Journal of performance of constructed facilities. ISSN 0887-3828. 36(2). doi: 10.1061/(ASCE)CF.1943-5509.0001706. Vis sammendrag

  Under excessive plastic deformations, pitting corrosion can accelerate ductile fracture initiation in steel structures. For an accurate numerical prediction of ductile fracture in corrosion pits, a micromechanical fracture criterion along with a fine three-dimensional solid meshing is required. Previous studies on this topic are limited to simple plates; however, for a more detailed component, e.g., steel beam-to-column joint, implementing the pit geometry on the global model of the joint is challenging in terms of meshing and computational time. In this paper, two-level numerical modeling was employed to reduce the complexity of the problem. In this technique, submodels with refined mesh are used to perform micromechanical simulations and assess the ductility degradation of joints. For a case study joint, the pits near the edge of the web and flange plates were found to be the most critical and they can reduce the fracture initiation displacement of the joint by about 25%. On the other hand, the pits located on the edges of plates or far from the edges caused a negligible reduction in the fracture initiation displacement of the joint. These results suggest two-level numerical modeling as a viable technique to facilitate micromechanical simulation of pitting corrosion in corroded steel joints.

• Mahdavipour, Mohammad Ali & Vysochinskiy, Dmitry (2022). Developing Fracture-Based Fragility Curves for Steel Components in Corrosive Environments. Journal of Structural Engineering. ISSN 0733-9445. 148(4). doi: 10.1061/(ASCE)ST.1943-541X.0003299.
• Vysochinskiy, Dmitry; Akhtar, Naureen; Nordmo, Tord; Strand, Mathias Rabjerg; Vyssios, Adrian & Bak, Morten Kollerup (2021). Experimental investigation of effect of printing direction and surface roughness on the mechanical properties of AlSi10Mg-alloy produced by selective laser melting. ESAFORM 2021. ISSN 2198-9915. doi: 10.25518/esaform21.3627. Fulltekst i vitenarkiv Vis sammendrag

  The additive manufacturing has initially gained popularity for production of non-loadbearing parts and components or in the fields where the material strength and ductility are less important such as modelling and rapid prototyping. But as the technology develops, availability of metal additive manufacturing naturally dictates the desire to use the produced components in load-bearing parts. This requires not-only a thorough documentation on the mechanical properties but also additional and independent research to learn the expected level of variation of the mechanical properties and what factors affect them. The presented paper investigates strength, ductility, hardness, and microstructure of the AlSi10Mg alloy produced by the selective laser melting (SLM). The mechanical properties were determined through a series of uniaxial tension tests and supplementary hardness tests and rationalized with the microstructure evolution with regard to printing direction and heat treatment. The paper also addresses the effect of surface roughness on the mechanical properties of the material, by comparing the machined and net shape tension samples. As expected, the as-manufactured AlSi10Mg-alloy appears to be a semi-brittle alloy, but its microstructure can be altered, and ductility increased by a proper heat-treatment. The effect of surface layer removal on the measured mechanical properties is of particular interest.

• Noorsumar, Gulshan; Rogovchenko, Svitlana; Robbersmyr, Kjell Gunnar; Vysochinskiy, Dmitry & Klausen, Andreas (2021). A Novel Technique for Modeling Vehicle Crash using Lumped Parameter Models, 11th International Conference on Simulation and Modeling Methodologies, Technologies and Applications (SIMULTECH 2021). SciTePress. ISSN 978-989-758-528-9. s. 62–70. doi: 10.5220/0010529200620070. Fulltekst i vitenarkiv
• Noorsumar, Gulshan; Vysochinskiy, Dmitry; Englund, Even; Robbersmyr, Kjell Gunnar & Rogovchenko, Svitlana (2021). Effect of welding and heat treatment on the properties of UHSS used in automotive industry. The European Physical Journal Conferences. ISSN 2101-6275. 250. doi: 10.1051/epjconf/202125005015. Fulltekst i vitenarkiv
• Noorsumar, Gulshan; Rogovchenko, Svitlana; Robbersmyr, Kjell Gunnar & Vysochinskiy, Dmitry (2021). Mathematical models for assessment of vehicle crashworthiness: a review. International Journal of Crashworthiness. ISSN 1358-8265. doi: 10.1080/13588265.2021.1929760. Fulltekst i vitenarkiv
• Mahdavipour, Mohammad Ali & Vysochinskiy, Dmitry (2020). Effect of the Joint Strength on the Performance of Ordinary Moment-resisting Frames Under a Progressive Collapse Situation. I Papadrakakis, M.; Fragiadakis, Michalis & Papadimitriou, C. (Red.), EURODYN 2020: Proceedings of the XI International Conference on Structural Dynamics. European Association for Structural Dynamics. ISSN 978-618-85072-2-7. s. 3995–4006. doi: 10.47964/1120.9327.19341. Fulltekst i vitenarkiv
• Vysochinskiy, Dmitry & Rybakov, Dmitri (2020). On the Effect of Various Heat Treatments on Microstructure of AISI 4130 Steel Used in Sour Service Pipes, ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering - Volume 3: Materials Technology. The American Society of Mechanical Engineers (ASME). ISSN 978-0-7918-8434-8. doi: 10.1115/OMAE2020-18017. Fulltekst i vitenarkiv
• Noorsumar, Gulshan; Robbersmyr, Kjell Gunnar; Rogovchenko, Svitlana & Vysochinskiy, Dmitry (2020). Crash Response of a Repaired Vehicle-Influence of Welding UHSS Members. SAE technical paper series. ISSN 0148-7191. 1- 2020(April), s. 1–5. doi: 10.4271/2020-01-0197. Fulltekst i vitenarkiv
• Mahdavipour, Mohammad Ali; Ding, songxiong & Vysochinskiy, Dmitry (2019). Performance of welded flange plate joints between steel beams and box columns without continuity plates. I Zingoni, Alphose (Red.), Advances in Engineering Materials, Structures and Systems: Innovations, Mechanics and Applications. CRC Press. ISSN 9780429426506. s. 1179–1183.
• Stave, Daniel Årrestad; Schlanbusch, Rune; Vysochinskiy, Dmitry & Grasmo, Geir (2019). Condition Monitoring of Steel Wire Ropes. I Dohm, M. A. R. (Red.), Exploring Opportunities - Synthetic/Steel - Proceedings of the OIPEEC Conference 2019. OIPEEC. ISSN 978-1-7336004-0-8.
• Munyazikwiye, Bernard; Vysochinskiy, Dmitry; Kdadyko, Mikhail & Robbersmyr, Kjell Gunnar (2018). Prediction of Vehicle Crashworthiness Parameters Using Piecewise Lumped Parameters and Finite Element Models. Designs. ISSN 2411-9660. 2. doi: 10.3390/designs2040043. Fulltekst i vitenarkiv
• Vysochinskiy, Dmitry; Coudert, Térence; Hopperstad, Odd Sture; Lademo, Odd-Geir & Reyes, Aase Gavina Roberg (2017). Experimental study on the formability of AA6016 sheets pre-strained by rolling. International Journal of Material Forming. ISSN 1960-6206. s. 1–17. doi: 10.1007/s12289-017-1363-6. Fulltekst i vitenarkiv
• Vysochinskiy, Dmitry; Coudert, Térence; Hopperstad, Odd Sture; Lademo, Odd-Geir & Reyes, Aase Gavina Roberg (2016). Experimental detection of forming limit strains on samples with multiple local necks. Journal of Materials Processing Technology. ISSN 0924-0136. 227, s. 216–226. doi: 10.1016/j.jmatprotec.2015.08.019. Fulltekst i vitenarkiv Vis sammendrag

  Sheet metal formability is traditionally described by the forming limit curve (FLC). Experimental FLCs are obtained by performing formability tests and determining failure strains. The strains are usually measured either by etching a grid on the sheet surface or by digital image correlation (DIC). Ductile metal sheets fail primarily by local necking which introduces a severe strain gradient in the failure region. This makes accurate detection of the failure strains challenging. An international standard (ISO12004-2:2008) was introduced in 2008 to unify the procedure of FLC detection; prior to this large discrepancies were observed between the results reported by different laboratories. The main limitation of the standard method for detection of forming limits is that its application is limited to cases where a single local neck is formed in the metal sheet prior to fracture. In the case of multiple local necks, the samples are simply discarded. Furthermore, the standard method does not include any guidelines to distinguish the failure by local necking and direct failure by fracture. One of the advantages of DIC over the traditional etched-grid technique is that the former allows us to obtain not only the strain distribution but also its history. This allows for alternative methods for detection of forming limit strains. This paper introduces a DIC-based method which was specially developed to handle the case of multiple local necks and to distinguish failure by local necking from direct fracture automatically. The method is not confined to a single test type and can be used in combination with different formability tests as long as DIC is used to measure strains.

• Vysochinskiy, Dmitry; Coudert, Térence; Hopperstad, Odd Sture; Lademo, Odd-Geir & Reyes, Aase Gavina Roberg (2014). Experimental detection of the onset of local necking in an aluminium sheet. Materials Science Forum. ISSN 0255-5476. 794-796, s. 590–595. doi: 10.4028/www.scientific.net/MSF.794-796.590. Fulltekst i vitenarkiv
• Gruben, Gaute; Vysochinskiy, Dmitry; Coudert, Térence; Reyes, Aase Gavina Roberg & Lademo, Odd-Geir (2013). Determination of Ductile Fracture Parameters of a Dual-Phase Steel by Optical Measurements. Strain. ISSN 0039-2103. 49(3), s. 221–232. doi: 10.1111/str.12030. Fulltekst i vitenarkiv Vis sammendrag

  Marciniak–Kuczynski and Nakajima tests of the dual-phase steel Docol 600DL (www.ssab.com/) have been carried out for a range of stress-states spanning from uniaxial tension to equi-biaxial tension. The deformation histories of the specimens have been recorded by digital images, and the displacement and strain fields have been determined by post-processing the images with digital image correlation software. The fracture characteristics of the material are presented by means of the stress triaxiality, the Lode parameter and the equivalent strain. These parameters are evaluated on the surface of the specimens based on the optical field measurements and assumptions regarding the mechanical behaviour of the material. Additionally the minor versus major principal strains up to fracture are presented. It is found that the material displays a significantly lower ductility in plane-strain tension than in uniaxial tension and equi-biaxial tension, and that it, in the tests exposed to local necking, undergoes large strains between the onset of necking and fracture. Fractographs of selected specimens reveal that fracture is due to growth and coalescence of voids that occur in localised areas governed by shear-band instability.

• Vysochinskiy, Dmitry; Coudert, Térence; Reyes, Aase Gavina Roberg & Lademo, Odd-Geir (2012). Determination of forming limit strains using Marciniak-Kuczynski tests and automated digital image correlation procedures. Key Engineering Materials. ISSN 1013-9826. 504-506, s. 17–22. doi: 10.4028/www.scientific.net/KEM.504-506.17. Fulltekst i vitenarkiv Vis sammendrag

  Forming limit strains are used to construct a forming limit diagram (FLD), which is a diagram in the principal strain space, traditionally used for designing forming operations of sheet metals. A line indicating the boundary between safe and unsafe strains is often called the forming limit curve (FLC). FLDs are also used to evaluate results from finite element simulations. Therefore consistency and reproducibility are important. This paper deals with the experimental determination of forming limit strains from Marciniak-Kuczynski (MK) tests. The material tested is AA6016 aluminum alloy in three different conditions: virgin material and material subjected to 5% and 8% deformation by rolling. Strains were measured by the use of digital image correlation (DIC) technique. Forming limit strains were determined by the use of two automated methods. The results from the two methods are compared and evaluated regarding their applicability to the Marciniak-Kuczynski test and ability to capture actual forming limit strains.

Se alle arbeider i Cristin

• Noorsumar, Gulshan; Robbersmyr, Kjell Gunnar; Rogovchenko, Svitlana & Vysochinskiy, Dmitry (2021). An overview of Data Based Predictive Modeling Techniques used in Analysis of Vehicle Crash Severity.
• Noorsumar, Gulshan; Rogovchenko, Svitlana; Robbersmyr, Kjell Gunnar; Vysochinskiy, Dmitry & Klausen, Andreas (2021). A Novel Technique for Modeling Vehicle Crash using Lumped Parameter Models.
• Noorsumar, Gulshan; Rogovchenko, Svitlana; Robbersmyr, Kjell Gunnar & Vysochinskiy, Dmitry (2023). Modeling, Simulation and Prediction of Vehicle Crashworthiness in Full Frontal Impact. University of Agder. ISSN 978-82-8427-113-2. Fulltekst i vitenarkiv
• Mahdavipour, Mohammad Ali; Vysochinskiy, Dmitry & Jiang, Zhiyu (2022). Failure prediction of steel components under the coupled effect of excessive plastic deformations and pitting corrosion. University of Agder. ISSN 978-82-8427-073-9.

Se alle arbeider i Cristin