Srdjan Simunovic
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View article: THE INFLUENCE OF QUENCHING AND TEMPERING ON THE HARDNESS AND MICROSTRUCTURE OF 42CrMo4 STEEL
THE INFLUENCE OF QUENCHING AND TEMPERING ON THE HARDNESS AND MICROSTRUCTURE OF 42CrMo4 STEEL Open
This article deals with the effect of quenching and tempering on the hardness and microstructure of 42CrMo4 steel. All investigated samples were water quenched from an austenitizing temperature of 820 °C. After quenching, the samples were …
View article: Analysis and Mitigation of Cascading Failures Using a Stochastic Interaction Graph With Eigen-Analysis
Analysis and Mitigation of Cascading Failures Using a Stochastic Interaction Graph With Eigen-Analysis Open
In studies on complex network systems using graph theory, eigen-analysis is typically performed on an undirected graph model of the network. However, when analyzing cascading failures in a power system, the interactions among failures sugg…
View article: Correlations of Interlayer Time with Distortion of Large Ti-6Al-4V Components in Laser Metal Deposition with Wire
Correlations of Interlayer Time with Distortion of Large Ti-6Al-4V Components in Laser Metal Deposition with Wire Open
Laser metal deposition with wire (LMD-w) is one of the emerging additive manufacturing (AM) technologies for large-scale aerospace components due to high deposition rates and material efficiency. However, it often results in undesired stre…
View article: A review on simulation models of cascading failures in power systems
A review on simulation models of cascading failures in power systems Open
Among various power system disturbances, cascading failures are considered the most serious and extreme threats to grid operations, potentially leading to significant stability issues or even widespread power blackouts. Simulating power sy…
View article: Prediction and understanding of non-linear distortion on large curved wall manufactured by wire-arc direct energy deposition
Prediction and understanding of non-linear distortion on large curved wall manufactured by wire-arc direct energy deposition Open
Wire-arc direct energy deposition (wire-arc DED) has been developed to manufacture large-scale metal products with high deposition rates, low material cost, and high material efficiency. However, dynamically varying printing conditions and…
View article: Current collectors for improved safety
Current collectors for improved safety Open
A battery electrode assembly includes a current collector with conduction barrier regions having a conductive state in which electrical conductivity through the conduction barrier region is permitted, and a safety state in which electrical…
View article: Material mechanical characterization method for multiple strains and strain rates
Material mechanical characterization method for multiple strains and strain rates Open
A specimen for measuring a material under multiple strains and strain rates. The specimen including a body having first and second ends and a gage region disposed between the first and second ends, wherein the body has a central, longitudi…
View article: Parallel-in-Time Power System Simulation Using a Differential Transformation Based Adaptive Parareal Method
Parallel-in-Time Power System Simulation Using a Differential Transformation Based Adaptive Parareal Method Open
For parallel-in-time simulation of large-scale power systems, this paper proposes a differential transformation based adaptive Parareal method for significantly improved convergence and time performance compared to a traditional Parareal m…
View article: Lithium-Ion Batteries with Safer Current Collectors
Lithium-Ion Batteries with Safer Current Collectors Open
The US Department of Energy’s Oak Ridge National Laboratory and Soteria Battery Innovation Group collaborated to develop a metallized polymer film as a current collector for lithium-ion batteries and design slit patterns for electrodes to …
View article: Modelling of Microstructure Evolution in Wire-Based Laser Direct Energy Deposition with Ti-6Al-4V
Modelling of Microstructure Evolution in Wire-Based Laser Direct Energy Deposition with Ti-6Al-4V Open
Over the past years, wire-based direct energy deposition (DED) has been transitioning from rapid prototyping to the production of end-use part and mass production. However, a wide market penetration of the DED has not happened yet. The dif…
View article: Resilient Adaptive Parallel sImulator for griD (RAPID): An Open Source Power System Simulation Toolbox
Resilient Adaptive Parallel sImulator for griD (RAPID): An Open Source Power System Simulation Toolbox Open
This paper describes an open source power system simulation toolbox: Resilient Adaptive Parallel sImulator for griD (RAPID), a package of Python codes that implements an advanced power system dynamic simulation framework. The main function…
View article: Statistical Physics of Fracture: Scientific Discovery Through High-Performance Computing
Statistical Physics of Fracture: Scientific Discovery Through High-Performance Computing Open
The paper presents the state-of-the-art algorithmic developments for simulating the fracture of disordered quasi-brittle materials using discrete lattice systems. Large scale simulations are often required to obtain accurate scaling laws; …
View article: Implementation of Disruptive Designs for Gas Turbine Components Utilizing Additive Manufacturing
Implementation of Disruptive Designs for Gas Turbine Components Utilizing Additive Manufacturing Open
Electron beam melting (EBM) is an additive manufacturing process used to print metallic components with complex geometries for aerospace applications. A preheating characteristic enables this technology to avoid large accumulation of resid…
View article: Examination of Semi-Analytical Solution Methods in the Coarse Operator of Parareal Algorithm for Power System Simulation
Examination of Semi-Analytical Solution Methods in the Coarse Operator of Parareal Algorithm for Power System Simulation Open
With continuing advances in high-performance parallel computing platforms, parallel algorithms have become powerful tools for development of faster than real-time power system dynamic simulations. In particular, it has been demonstrated in…
View article: Mechanical Modeling and Testing of Pouch Cells under Various Loading Conditions
Mechanical Modeling and Testing of Pouch Cells under Various Loading Conditions Open
Understanding the mechanical behaviors of batteries is critical to improve battery safety since mechanical failure may directly lead to short-circuits. Nevertheless, mechanical modeling of batteries is challenging since a cell usually cont…
View article: Performance and Feature Improvements in Parareal-based Power System Dynamic Simulation
Performance and Feature Improvements in Parareal-based Power System Dynamic Simulation Open
In recent years, a novel Parareal-based approach has been developed for fast transient simulations of large power system interconnections. Parareal belongs to the class of Parallel-in-time algorithms for solution of systems of differential…
View article: Thermochemically-Informed Mass Transport Model for Zr in U-Zr Fuel
Thermochemically-Informed Mass Transport Model for Zr in U-Zr Fuel Open
Recent improvements to the coupled Thermochimica-MOOSE/BISON code system have enabled efficient calculations of species transport based on direct evaluation of composition and temperature dependent chemical potentials of the species. This …
View article: Development and Validation of a Simulation Tool to Predict the Combined Structural, Electrical, Electrochemical and Thermal Responses of Automotive Batteries
Development and Validation of a Simulation Tool to Predict the Combined Structural, Electrical, Electrochemical and Thermal Responses of Automotive Batteries Open
Battery safety is one of the most important design factors of electrified vehicles (EVs) since battery failure may lead to a catastrophic consequence. To improve the safety of battery systems in EVs, battery behaviors under various abuse c…