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Conference Tools for NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
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Meeting NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
Symposium S-07: Computational Modelling of Scaled Processes and Experiments
Presentation Title Exact and Inexact Multiple-scaled Models for Hot Forging: Part I Theory
Author(s) Keith Davey, Olga Bylya, Bhaskaran Krishnamurthy
On-Site Speaker (Planned) Keith Davey
Abstract Scope Scaled experimentation continues to play a significant role in process, product design and testing for metallic components and products but is recognized to suffer severe limitations. The difficulty with scaling manifests principally from the non-linear relationships between the physical constraints imposed on any scaled physical system. This paper is concerned with an assessment of a new scaling approach called finite similitude that has appeared in the recent literature and a new methodology for exact and inexact-experimentation involving multiple-scaled experiments. Finite similitude is founded on the scaling of space itself and on a formulation that ensures that the governing physics (in transport form) remain invariant up to proportionality. Unfortunately proportionality breaks down with scale and to account for this, experiments at more than one scale are considered. The fundamental new idea underpinning the work is the design of scale-dependent experiments that focus on a critical aspect (e.g. boundary conditions, material flow) that is dominant at a particular scale. Friction and material behavior are the focus of the work with friction dominating at smaller scales and bulk responses at larger scales. The work focuses on theoretical aspects and the difficulties associated with scaling but also on experimentation at more than on scale, which is shown to offer measurable advantages.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Anisotropic Scaling in Metal Forming
Exact and Inexact Multiple-scaled Models for Hot Forging: Part I Theory
Exact and Inexact Multiple-scaled Models for Hot Forging: Part II Experimental
Finite Similitude in Dynamic Powder Compaction
Material Optimisation for Scaled Physical Modelling of Hot Forging Processes
Multi-scale Friction Modeling of Coated Steels for Sheet Metal Forming Applications
Scaling of High Speed Chip Formation
Study on micro-deformation and hardening behavior of DP steel based on CMSG plasticity model

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