DAMTP Solid Mechanics at ICTP 2014

Blackboard We will be attending and presenting at the International Conference on the Technology of Plasticity in Nagoya, Japan, 19-24 October 2014. We would very much like to meet you there!


Our talk

Comparison of analytical models for sheet metal rolling

Wednesday 22nd October, 15:20-15:40, Room E

Driven by the need for fast modelling of metal forming processes for use in closed-loop control, we investigate the advantages and drawbacks of analytical approaches as compared with standard finite element calculations, using rolling as an exemplar process. Three different analytical methods from the literature are compared with simulation results, and conclusions are drawn regarding their suitability for use in closed-loop control.

Click the image to enlarge.


Our interests

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Asymptotic modelling for metal forming processes

Our principal area of expertise lies in using asymptotic methods to derive approximate solutions to plasticity problems. Our goal is to produce calculations that are fast enough to complete in real time (and therefore be used for real time control), while remaining sufficiently accurate for practical use. Our current work is exemplified by the picture to the left, which shows the variation of vertical velocity resulting from a careful treatment of different regions in a simple rolling mill.

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Targeted heating and thermal transfer

Heat generation and transfer is important in many areas of metalworking. In particular, it can be desirable to control the heat distribution within a workpiece in order to create spatial variation in the microstructure. The picture to the left shows the time evolution (bottom to top) of temperature in a strip passed back and forth through two fixed heaters, and cooled by contact with a forming roller. We hope to use such models to achieve fine control over the microstructure in products formed by a variety of processes.

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Stability and control

We are also interested in the prediction and control of process instabilties such as wrinkling and chatter in a range of processes. A problem of particular relevance to us at present is the wrinkling that occurs during mandrel-free spinning (see James Polyblank's talk - Thursday 10:30-10:50, Room B).


Contact us!

We would love to hear about your work, and perhaps find ways in which our mathematical expertise could help with your challenges.

Please find us in person in Nagoya, or email us using the links below. Internet permitting, we will also be tweeting our experiences at the ICTP via @damtp_solids.

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Dr Ed Brambley

Ed is a research associate with expertise in linear continuum mechanics, particularly involving acoustics and fluid-structure interactions. He uses advanced mathematical techniques to analyse the stability of a range of phyiscal processes.

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Dr Chris Cawthorn

Chris is a postdoctoral research associate whose interests centre on modelling fluid, solid and granular materials in motion. He is currently working on the addition of bending moments to traditional sheet rolling models.

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Jeremy Minton

Jeremy is a Ph.D student currently modelling sheet metal rolling using asymptotic methods to derive fast analytical solutions.