Current Problems in Experimental and Computational Engineering: Proceedings of the International Conference of Experimental and Numerical ... 2021 (Lecture Notes in Networks and Systems)

Scientific Committee
Preface
Contents
Contributors
A FEM Analysis of Mortise and Tenon Joint Within Chairs
	1 Introduction
	2 Material and Methods
		2.1 Initial Model
		2.2 Joints
		2.3 Materials
		2.4 Model Preparation
	3 Results and Discussion
		3.1 Optimization of the Initial Chair Model
		3.2 Tests with Measuring Gauges
		3.3 Joint Optimization
		3.4 Experimental Verification of the Final Model of the Chair
	4 Conclusions
	References
How to Improve Energy Consumption and GHG Emissions in the Wood Pellet Production in Serbia
	1 Introduction
	2 The Basics About the Wood Pellets
		2.1 The Production Process in the Pellet Factory
		2.2 Wood Pellet Production and Consumption in Europe
		2.3 Wood Pellet Production and Consumption in Serbia
	3 Material and Methods
	4 Results and Discussion
		4.1 The Possibilities for Reduction of Consumption of Energy and Raw Materials in Pellet Plants
		4.2 The Possibilities for Reduction of the GHG Emission in the Pellet Plants
		4.3 Overall Effects of the Proposed Improvements
	5 Conclusions
	References
Multi-objective Optimization and Experimental Testing of a Laminated Vertical-Axis Wind Turbine Blade
	1 Introduction and Motivation
	2 Numerical Calculation
		2.1 Starting Geometric Model of the Wind Turbine Rotor
		2.2 Flow Simulation
		2.3 Description of the Structural Model and Design Variables
	3 Multi-Objective Particle Swarm Optimizations (PSO)
		3.1 Basics of PSO
		3.2 Formulation of the Optimization Problem
	4 Numerical Results and Discussion
		4.1 Two-Criteria Optimization
		4.2 Optimal Solution
	5 Validation of the Defined Design Methodology Through Experimental Testing
		5.1 Blade Manufacturing
		5.2 Experiment
		5.3 Results and Discussion
	6 Conclusions
	References
Analysis of the Use of Renewable Energy Sources in the Republic of Serbia
	1 Introduction
	2 Materials and Methods
		2.1 The International Renewable Energy Agency (IRENA)
		2.2 Energy Agency and Electric Power Industry of Serbia
		2.3 Statistics of Countries
	3 Results and Discussion
	4 Conclusion
	References
Computational Fluid Dynamics and Strength Analysis of Composite UAV Wing
	1 Introduction
	2 Aerodynamic Computer Fluid Solver Analysis
		2.1 Results of CFD Numerical Simulation
	3 Experimental Static Testing and Comparison with Numerical Results
	4 Conclusions
	References
Investigations and Results Analysis of Key Parameters of Vehicle Tracking System
	1 Introduction
	2 GPS Vehicle Tracking System
	3 Implementing of the SWARA Method
	4 The Aggregating Techniques and Decision Making
	5 Conclusion
	References
Morphology and Nanomechanical Properties of Ultrafine-Grained Ti-13Nb-13Zr Alloy Surface Obtained Using Electrochemical Anodization
	1 Introduction
		1.1 Titanium Based Materials for Medical Application
		1.2 Application of Severe Plastic Deformation in Materials Processing
		1.3 Nanostructured Surface Modification of Titanium Based Materials
	2 Experimental
		2.1 Materials
		2.2 Electrochemical Anodization
		2.3 Nanoindentation Test
		2.4 Numerical Analysis of Influence of Nanotube Dimensions on Resistance to Loading During Nanoindentation
	3 Results and Discussion
		3.1 Morphology of the Nanotubular Oxide Layer Obtained Using Electrochemical Anodization
		3.2 Influence of Electrochemical Anodization on Physical and Mechanical Properties of the Surface of Ti-13Nb-13Zr Alloy
		3.3 Results Obtained from Numerical Analysis
	4 Conclusions
	References
Occurrence and Ecotoxicological Risk Assessment of Emerging Contaminants in Urban Wastewater Treatment Plant
	1 Introduction
	2 Materials and Methods
		2.1 Chemicals and Reagents
		2.2 Studied Area
		2.3 Sample Preparation Procedure
		2.4 Calibration
		2.5 LC-MS2Analysis of Emerging Contaminants
		2.6 Removal Efficiency of Selected Emerging Contaminants
		2.7 Ecotoxicological Risk Assessment for the Receiving Watercourse
	3 Results and Discussion
		3.1 Removal Efficiency of the Detected Micropollutants
		3.2 Ecotoxicological Risk Assessment of the Detected Emerging Contaminants
	4 Conclusion
	References
A Study on the Performance of LDPE/PCL Double Layered Packaging Films Containing Coper Oxide/Nanocellulose Composite
	1 Introduction
	2 Experimental
		2.1 Materials
		2.2 Preparation Procedures
		2.3 Characterization of Hybrid Films
	3 Results and Discussion
		3.1 Raman Analysis
		3.2 ATR-FTIR Analysis
		3.3 Mechanical Properties
	4 Conclusion
	References
Configuring a Class of Machines Based on Reconfigurable 2DOF Planar Parallel Mechanism
	1 Introduction
	2 Description of a Reconfigurable 2DOF Parallel Mechanism
	3 Geometric Model and Kinematics of Reconfigurable 2DOF Parallel Mechanism MOMA
		3.1 Solution of Inverse Kinematics Problem
		3.2 Solutions of Direct Kinematics Problem
	4 Analyses of Reconfigurable 2DOF Parallel Mechanism
		4.1 Workspace Analysis
		4.2 Jacobian Matrix and Singularity of Reconfigurable 2DOF Parallel Mechanism MOMA
		4.3 MOMA—Gui, Software for Analysis of Reconfigurable 2 DOF Parallel Mechanism
	5 Machine Tools Based on Reconfigurable 2DOF Parallel Mechanism MOMA
		5.1 Three-Axis Machine MOMA-3
		5.2 Four-Axis Complex Machine MOMA-W
	6 Control and Programming of Machine Tools Based on Reconfigurable Parallel Mechanism MOMA
	7 Conclusion
	References
Strategic Importance and Sustainable Governance of High-Tech Business Incubators: Evidence from Serbia
	1 Introduction
	2 Private Versus Public Operation of BI
	3 Current Situation of Business Incubators in Serbia
	4 Business Incubation Finance Management
		4.1 Capital Expenditures, Operating Costs and Reinvestments
		4.2 Revenue and Cash Flow
		4.3 Pro Forma Statements
	5 Performance Management of Business Incubator
	6 Accounting and Reporting the Results
		6.1 Tenants’ Report
		6.2 Impact Report
		6.3 Finance and Risk
	7 Conclusion
	References
Development and Validation of an Open-Source Finite-Volume Method Solver for Viscoplastic Flows
	1 Introduction
	2 Methodology
		2.1 Governing Equations
		2.2 Numerical Algorithm
	3 Results and Discussion
		3.1 Flow of Bingham Plastics in Lid-Driven Square Cavity
		3.2 Flow in a Sudden Expansion (1:2 Ratio)
		3.3 Flow in a T-Branch
		3.4 Conclusion
	References
Comparison of Tensile Properties of Carbon/Epoxy Composite Materials with Different Fiber Orientation Using Digital Image Correlation
	1 Introduction
	2 Experimental
		2.1 Materials
		2.2 Characterization
	3 Results and Discussion
		3.1 Tensile Testing and 3D Digital Image Correlation
		3.2 SEM Analysis
	4 Conclusions
	References
Stress Corrosion Crack Growth Simulation by the Finite Element Method
	1 Introduction
	2 Extended Finite Element Method
		2.1 XFEM Analysis of SCC Growth in a Tensile Specimen
	3 Conclusions
	References
Start-Up Community and the Acceleration Services in the Danube Macro-Region: Cases of Austria, Bosnia and Herzegovina, Hungary and Slovenia
	1 Introdcution
	2 Methodology
	3 Profiles of the DMR and the Observed Countries/Regions
	4 Innovation-Driven SMEs and Talent Communities in the DMR (Demand Side)
	5 Access to Finance and Start-Up Support in the DMR (Supply Side)
		5.1 Case Study: Accelerator Programs University Spin-Off Centers
		5.2 Case Study: Cross-Border Cooperation: The Challenge to Change Program
		5.3 Case Study: The Innovation Center Banja Luka
		5.4 Best Cases: ICatapult
		5.5 Case Study: Accelerators in Slovenia
	6 Future Outlook, Conclusions and Recommendations
	References
Fatigue Life Evaluation of the Damaged Passenger Boarding Bridge Supports
	1 Introduction
	2 Determination of Loads and Structural Analysis
	3 2D Finite Element Analysis of the PBB
	4 3D FE Analysis
		4.1 3D FE Analysis of the Pin-Lug Support at Point F
		4.2 3D FE Analysis of the Support Assembly at Point B
		4.3 Fatigue Crack Growth Analysis
	5 Conclusion
	References
Effects of Flue Gas Recirculation on NOx Emissions from Gas-Fired Utility Boilers
	1 Introduction
		1.1 EU Regulations on Energy Efficiency and Environmental Protection
		1.2 Scope of the Work
		1.3 Research Review
	2 Technical System Description
		2.1 Flue Gas Recirculation (FGR)
		2.2 Low NOx Burners
		2.3 Case Study Plant
		2.4 Applied FGR System
	3 Results and Discussion
	4 Conclusion
	References
Advanced Procedure for Making Vibro Motor Coupling of Basket Crusher by Welding and Plasma Cutting
	1 Introduction
	2 Experimental Procedure
	3 Results and Discussion
		3.1 Plasma Clamp Cutting
		3.2 Making a Wedge on the Hub
		3.3 Drilling Fuse Holes and Threading
		3.4 Heat Treatment of Materials
		3.5 Welding
		3.6 Fine Machining
		3.7 Insertion of Drilled Holes
		3.8 Surface Protection by Cold Galvanizing
		3.9 Making a Rubber Part of the Coupling
	4 Numerical Modeling
	5 Conclusion
	References
Mathematical Model of Patient Support System in Medical Linear Accelerators for External Beam Radiation Therapy
	1 Introduction
	2 Mathematical Model
		2.1 Equations of Motion for a PSS Mounted Above the Floor
		2.2 Equations of Motion for a PSS Mounted in a Deep Pit
		2.3 Equations of Motion of the Gantry and Treatment Head
	3 Discussion
	4 Conclusion
	Appendix
	References