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A combined DEM–FEM numerical method for Shot Peening parameter optimisation
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Murugaratnam, Kovthaman, Utili, Stefano and Petrinic, Nik (2015) A combined DEM–FEM numerical method for Shot Peening parameter optimisation. Advances in engineering software, 79 . pp. 13-26. doi:10.1016/j.advengsoft.2014.09.001 ISSN 0965-9978.
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Official URL: http://dx.doi.org/10.1016/j.advengsoft.2014.09.001
Abstract
A numerical modelling approach capable of simulating Shot Peening (SP) processes of industrial interest was developed by combining the Discrete Element Method (DEM) with the Finite Element Method (FEM).
In this approach, shot–shot and shot–target interactions as well as the overall shot flow were simulated efficiently using rigid body dynamics. A new algorithm to dynamically adapt the coefficient of restitution (CoR) for repeated impacts of shots on the same spot was implemented in the DEM code to take into account the effect of material hardening. Then, a parametric study was conducted using the Finite Element Method (FEM) to investigate the influence of the SP parameters on the development of residual stresses.
Finally, a two-step coupling method is presented to combine the output of DEM simulation with FEM analyses to retrieve the Compressive Residual Stresses (CRS) after multiple impacts with the aim to evaluate the minimum area required to be modelled to realistically capture the field of residual stresses. A series of such coupled analyses were performed to determine the effect of peening angle and the combination of initial velocity and mass flow rate on CRS.
Item Type: | Journal Article | ||||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||
Library of Congress Subject Headings (LCSH): | Discrete element method | ||||||||||
Journal or Publication Title: | Advances in engineering software | ||||||||||
Publisher: | Elsevier | ||||||||||
ISSN: | 0965-9978 | ||||||||||
Official Date: | January 2015 | ||||||||||
Dates: |
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Volume: | 79 | ||||||||||
Number of Pages: | 14 | ||||||||||
Page Range: | pp. 13-26 | ||||||||||
DOI: | 10.1016/j.advengsoft.2014.09.001 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 30 December 2015 | ||||||||||
Date of first compliant Open Access: | 30 December 2015 | ||||||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), Rolls-Royce Group plc, DEM Solutions (Firm) |
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