Abstract
The metal surface layer mechanical condition transformation at the product life cycle stages key provisions are presented. The described approach feature is the hardened body effect consideration: the metal mechanical properties changing during it displacement through the deformation zone space. On the basis of the developed for surface plastic deformation process hardened elastic-plastic body model, the cumulative shear strain level, plasticity reserve exhaustion level and residual stress tensor components calculations are performed. It is established that the greatest residual compressive stresses are characteristic for the axial component, and the extremum can be located both on the workpiece surface and at some distance from it. The metal hardening influence on the residual stresses distribution is revealed. On the axial (largest) component example shown that the difference between the maximum values is almost 30%. The obtained result corresponds to the idea that the hardened metal having an increased yield strength allows a larger residual stresses presence.
Highlights
It is known that the metal mechanical condition largely determines product operational life, with this at the manufacture stages, including the machining stages, the metal experiences significant changes.Currently, the surface layer (SL) predominant role in ensuring the machine parts durability is generally recognized [1,2,3,4,5,6,7,8,9,10,11,12,13]
The main provisions of the proposed approach are: - the SL mechanical condition transformation in the machining stages and subsequent operational loading are considered as a uniform continuous process of strain accumulation, plasticity reserve exhaustion and residual stresses (RS) transformation in metal surface layer
- a strain limit accumulation, a complete plasticity reserve exhaustion and fatigue crack nucleation occurs at a probable failure point, which may be located both on the surface and at some distance from it;
Summary
It is known that the metal mechanical condition largely determines product operational life, with this at the manufacture stages, including the machining stages, the metal experiences significant changes.Currently, the surface layer (SL) predominant role in ensuring the machine parts durability is generally recognized [1,2,3,4,5,6,7,8,9,10,11,12,13]. The authors developed the scientific view about the surface layer mechanical condition transformation in machining processes and operation on the basis of cumulative shear strain level and plasticity reserve exhaustion level estimation and residual stress transformation in the deformation zones (DZ) under the stress-strain condition changing and with consideration of the metal properties transformation in DZ space (the hardened body effect) [14,15].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
