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Subproject B2
Simulating the Forming of Piezo-Metal-Composites
Coordinators:
Prof. Dr.-Ing. habil. Prof. E. h. Dr.-Ing. E. h. Reimund NeugebauerFraunhofer Institute for Machine Tools and Forming Technology IWU
Reichenhainer Straße 88
D-09126 Chemnitz
Telephone: +49-(0)371/5391-1401
Telefax: +49-(0)371/5391-1404
E-Mail: reimund.neugebauer@iwu.fraunhofer.de
Prof. Dr.-Ing. habil. Reiner Kreißig
Institute for Mechanics
Chemnitz University of Technology
D-09107 Chemnitz
Telephone:+49-(0)371/531-1242
Telefax: +49-(0)371/531-1471
E-Mail: reiner.kreissig@mb.tu-chemnitz.de
Presenting the Research Program
In the first application term, the research task comprises the numeric simulation of forming the piezo-metal composites by means of the finite elements method.
In this case, a piezo module (purchased part) is embedded by two sheet metal plates. In the forming of this composite, a combined bending, torsional and stretching stress occurs. As the piezo fibers are marked by a brittle material behavior, the deformations of the piezo module produced from the forming process are destined to be limited. Through a “floating” bearing of the piezo module in between the sheet metal plates that is present when using a relatively thin fluid adhesive for compounding module and sheet metal, a stretching stress can be avoided as far as possible. The hardening of the adhesive to ensure the functional task of the composite is only obtained after the forming.
Knowledge about the “global” mechanical behavior of the piezo module as well as about the rheological characteristics of the used adhesives is an important precondition for the numeric simulation for forming the composite. The object of the following FEM-simulation is to numerically calculate the deformations of the piezo module resulting from the forming of the composite so that statements on its functionality after the forming process can be made.
In this case, a piezo module (purchased part) is embedded by two sheet metal plates. In the forming of this composite, a combined bending, torsional and stretching stress occurs. As the piezo fibers are marked by a brittle material behavior, the deformations of the piezo module produced from the forming process are destined to be limited. Through a “floating” bearing of the piezo module in between the sheet metal plates that is present when using a relatively thin fluid adhesive for compounding module and sheet metal, a stretching stress can be avoided as far as possible. The hardening of the adhesive to ensure the functional task of the composite is only obtained after the forming.
Knowledge about the “global” mechanical behavior of the piezo module as well as about the rheological characteristics of the used adhesives is an important precondition for the numeric simulation for forming the composite. The object of the following FEM-simulation is to numerically calculate the deformations of the piezo module resulting from the forming of the composite so that statements on its functionality after the forming process can be made.
