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Advanced Friction Model for Cold Forging Processes

Ludwig, Manuel and Stahlmann, Jörg and Groche, Peter (2012):
Advanced Friction Model for Cold Forging Processes.
Wiley-VCH Verlag GmbH & Co., Weinheim, In: Metal Forming 2012, Krakow, Poland, [Conference or Workshop Item]

Abstract

To enhance the quality of finite-element-simulations the dependency of field variables significantly influencing friction behavior has to be taken into account. Therefore a new model was developed to optimize friction in the simulation of cold forging processes. The friction coefficient depends on contact normal stress and surface enlargement and accounts for the load dependent surface state. It was developed within experiments in the compression-sliding-test (CST). Due to surface evolutions the gradient of the friction coefficient was implemented in the FE-model. The surface parameter Sq describing the surface flattening during the process was additionally integrated as a field parameter in the FE-simulation. This paper describes the experimentally developed friction model and the implementation in FE-codes. The generality of the friction model is investigated by using implicit and explicit calculation schemes.

Item Type: Conference or Workshop Item
Erschienen: 2012
Creators: Ludwig, Manuel and Stahlmann, Jörg and Groche, Peter
Title: Advanced Friction Model for Cold Forging Processes
Language: English
Abstract:

To enhance the quality of finite-element-simulations the dependency of field variables significantly influencing friction behavior has to be taken into account. Therefore a new model was developed to optimize friction in the simulation of cold forging processes. The friction coefficient depends on contact normal stress and surface enlargement and accounts for the load dependent surface state. It was developed within experiments in the compression-sliding-test (CST). Due to surface evolutions the gradient of the friction coefficient was implemented in the FE-model. The surface parameter Sq describing the surface flattening during the process was additionally integrated as a field parameter in the FE-simulation. This paper describes the experimentally developed friction model and the implementation in FE-codes. The generality of the friction model is investigated by using implicit and explicit calculation schemes.

Publisher: Wiley-VCH Verlag GmbH & Co., Weinheim
Uncontrolled Keywords: Cold Forging, Friction model, FE-simulation
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institut für Produktionstechnik und Umformmaschinen (PtU)
Event Title: Metal Forming 2012
Event Location: Krakow, Poland
Date Deposited: 01 Nov 2012 12:09
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