Registration Number
0210U003676,
0107U010342
, R & D reports
Title
Development of the methods of calculation of residual stresses under multilayered surfacing of worn members and evaluation of its influence on thermal and mechanical fatique strength and life time of surfaced members
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Head
Senchenkov Igor Konstantinovich,
Registration Date
24-02-2010
Organization
S.P.Timoshenko Institute of Mechanics
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An objects of investigation are residual thermomechanical and microstructural state, fatigue strength of roll steal parts subjected by multilayered surfacing/ An aim of the work is to develop the methods of calculation of residual stresses and microstructure under surfacing of cylindrical parts and term of service of surfaced parts through with accounting of unsymmetry of operational cycle. Theoretical investigation were carried out on the base of thermomechanics of nonhomogeneous viscoplastic bodies and models of growing bodies. Iterative and time step methods as well as finite element method were used to calculate residual stress and microstructure of material under multilayered surfacing of cylindrical parts in particular rolls and dies/ Mathematical modeling of multilayered surfacing and subsequent operating of rolls was carried out/ with using specimens. It was found that the high plastic underlay fatigue strength of rolls is increased greater than 30% and tensile stresses is decreased on ~ 20%. Numerical and experimental fatigue results were compared. The results obtained can be used to investigate an influence of residual stresses in multilayered rolls and dies on fatigue and to choose the rational scheme of surfacing technology.
Product Description
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Баняс М.В.
Жук Я.О.
Левон Л.Г.
Червінко О.П.
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2020-04-02
