- Conference date: 27–29 April 2011
- Location: Belfast, (United Kingdom)
The part surfaces manufactured by bulk forming are submitted to large contact pressure and different friction conditions by the tooling. Some industrial processes like closed‐die forming are not using any lubricant and the corresponding tool‐workpiece interface behaviour is controlled by the actual roughness of the tool surface and the plastic stress‐strain law of the material in the vicinity of the surface workpiece. Experimental observation as well as numerical analysis show very large plastic strain in a layer the thickness of which is one order larger than the standard roughness of the tools. Some authors name the different phenomena as surface tribological transformations including mechanical, thermal, metallurgical, and chemical effects existing under any contact area . This work is only devoted to a mesoscopic mechanical analysis of the damage prediction under concentrated high mean stress associated to plastic distortion induced by the actual roughness geometry of a die upsetting cylinders and rings.
- Industrial processes
- Interface roughness
- Materials behavior
- Numerical analysis
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