Center of Technological Initiatives

Finite elements analysis

 

Specialists of our company have more than ten years of experience in finite element analysis and, together with scientists of the departments of «General Mechanics and Dynamics of Machines»,«Manufacturing Engineering, Machines and Tools», «Materials Strength and Mechanical Engineering» of Sumy State University can solve the most complicated problems. Main directions of research are static and transient analysis for strength and flexibility of nonlinear structures, modal and frequency analysis of the case parts and shafts, static and transient thermal analysis. The structure analysis is headed by doctor of technical sciences, Krivoruchko D., a specialist in the application of the finite elements method for modeling of nonlinear high speed deformation and fracture. A close relationship with the laboratory of mechanical tests of Sumy State University gives the opportunity to receive realistic solutions even for those materials for which the model of the material isn’t known and must be determined from experiment. Our tools are ANSYS, LS-DYNA, ABAQUS, DEFORM.

 

Selected publications:
1.Krivoruchko D. V., Zaloga V. A., Korbach V. G. Osnovyi 3D-modelirovaniya protsessov mehanicheskoy obrabotki metodom konechnyih elementov: uchebnoe posobie. -Sumyi: Izdatelstvo SumGU, 2010. -208 s.
2. Krivoruchko D. V. Modelirovanie protsessov rezaniya metodom konechnyih elementov : metodologicheskie osnovyi : monografiya /D. V. Krivoruchko, V. A. Zaloga. Pod obschey redaktsiey V. A. Zalogi – Sumyi : Universitetskaya kniga, 2012. – 450 s. .
3. Heisel, U. FEM-Modellierung als moderner Ansatz zur Untersuchung und Optimierung von Zerspanprozessen [Tekst] / U. Heisel, D. V. Kryvoruchko, V. A. Zaloha, M. Storchak, T. Stehle //ZWF. -2009. – 46 s.
4.Krivoruchko,D.V.Analiz sovremennyih metodov chislennogo modelirovaniya teplovyih yavleniy prirezanii materialov [Text]/ D. V.Krivoruchko, V. A. Zaloga, N. P. Mazur//SuchasnI tehnologiyi u mashinobuduvannI. -H.: NTU«HPI», 2007. -S. 31- 42.
5. Heisel, U. Modeling of Interaction Processes in Cutting [Електронний ресурс]/ U. Heisel, M. Storchak, D. V. Kryvoruchko, S. Braun // Proceedings of 2nd International CIRP Process Machine Interaction (PMI) Conference. -Vancouver: University of British Columbia, 2010. -8 s.
 

Selected successful projects:

1.Structure analysis for strength and flexibility of couplings (Customer LLC "NPP NASOSTEHKOMPLEKT" Sumy).
2.Development of ADPL macroses for modal and frequency analysis shafts with the gyroscopic effect (Customers LLC "NPP NASOSTEHKOMPLEKT", Sumy, PAO "Turbo gas", Kharkov).
3.Analysis of tightness in the wheel of high-speed compressor (Customer PAO "Turbo gas", Kharkov).
4.Analysis of the high pressure seal from polyurethane.
5.Express estimation of the efficiency of modern cutting inserts.
6.Development of technology for extraction cap (Customer PAO "Technology").
 
Examples of some solved problems with LS-DYNA
Problem description Animation

Purpose: simulation of technological process riveted joint forming (tear-off or pop rivet)

The type of elements: axisymmetric 2D elements

Task type: dynamic contact interaction

Load: motion the tear bar

Nonlinearity: elastic-plastic material, large deformations, contact interaction

Purpose: simulation of technological process riveted joint forming

The type of elements: axisymmetric 2D elements

Task type: dynamic contact interaction

Loads: moving the punch with a given law of motion

Nonlinearity: elastic-plastic material, large deformations, contact interaction

Purpose: simulation of technological process bellows forming

The type of elements: shell elements

Task type: dynamic contact interaction

Loads: initial internal technological pressure on workpiece and forming rings motion

Nonlinearity: elastic-plastic material, large deformations, contact interaction

Purpose: simulation of bullet motion in rifled barrel and subsequent bullet interaction with double layer exploded barrier

The type of elements: shell and solid elements

Task type: dynamic contact interaction

Loads: gas pressure at the tail of the bullet

Nonlinearity: elastic-plastic material, large deformations, contact interaction, fracture

Purpose: simulation of chip formation in groove turning

Type of elements: solid elements

Task type: dynamic contact interaction

Loads: law of tool motion

Nonlinearity: elastic-plastic material, large deformations, contact interaction, fracture

Purpose: simulation of chip formation in end milling

Type of elements: solid elements

Task type: dynamic contact interaction

Loads: law of tool motion

Nonlinearity: elastic-plastic material, large deformations, contact interaction, fracture

Purpose: simulation of chip formation in drilling

Type of elements: solid elements

Task type: dynamic contact interaction

Loads: law of tool motion

Nonlinearity: elastic-plastic material, large deformations, contact interaction, fracture