Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg



Fundamental investigation of ultrasonic-assisted metal forming by compressive and shear stress



Project Status: Active

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Superimposing tool movement with a high frequent mechanical oscillation enables a significant reduction of the forming force. Although the occurrent force and stress reduction are known phenomena, underlying reasons remain object of current research.

Objective of this research topic is the characterisation of material flow as well as the investigation of forming limits of metallic materials under ultrasonic impact with compressive and shear load. Therefore in baseline investigations oscillation-superimposed compression and shear tests with two dissimilar materials are carried out and analysed with respect to the material and process behaviour. Additionally non-measureable process factors are to be investigated by means of FE simulation with an oscillation sensitive material model. On the basis of experimental and simulative analysis it is possible to evaluate the influence of the ultrasonic assistance on the material behaviour. In addition, potential causes in reference to existing explanatory approaches can be identified and separated. Finally, it is to investigate if there is an improved material flow and a changed forming limit by the use the ultrasonic assistance.

Ultrasonic-assisted compression test and schematic yield stress reduction


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Letztes Update: 17.07.2018