Lilyana S. Koleva

20220508-03
Optimization of electron beam welding of Ti-6Al-4V thin plates
Lilyana S. Koleva, Asya Lozeva, Elena G. Koleva

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In this paper the electron beam welding of Ti–6Al–4V thin plates is simulated by implementation of a moving linear heat source model. The simulation results are used for estimation of regression models for the dependencies ...  read more

20220508-04
Simulation of electron beam welding of Inconel 718 thin plates
Lilyana S. Koleva, Natalia Hristova, Elena G. Koleva

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In this paper the simulation of electron beam welding of Inconel 718 thin plates by a moving linear heat source is considered. Regression models for the molten pool geometry characteristics, depending on the electron beam ...  read more

20220508-05
Robust model-based multicriterial optimization strategies for electron beam welding of Steel 45
Elena G. Koleva, Lilyana S. Koleva

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In this paper an experimental study of the geometrical characteristics of the cross-sections of the thermally affected areas obtained by electron beam welding joints of carbon steel grade 45 is made. The thermally affected ...  read more

20210912-03
Graphical user interface for simulation of the mechanical properties of a new type of black locust plywood for construction
Lilyana S. Koleva, Asen N. Hristov

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The mechanical properties bending strength and modulus of elasticity in bending of a new type plywood for construction, based on black locust wood, have been investigated in relationship with the bonding technological factors. ...  read more

20210912-02
Process parameter optimization of electron beam melting and refining of titanium
Elena G. Koleva, Lilyana S. Koleva, Volodia V. Dzharov, Boriana S. Spasova

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The mechanical properties bending strength and modulus of elasticity in bending of a new type plywood for construction, based on black locust wood, have been investigated in relationship with the bonding technological factors. ...  read more