On the development of a finite element model to analyze the behavior of hybrid composites considering the manufacturing history

International Deep Drawing Research Group 37th Annual Conference

Riemer, M.^1 ; Kießling, R.^1 ; Müller, R.^1 ; Drossel, W.-G.^1 ; Landgrebe, D.^1 ; Ihlemann, J.^2

Fraunhofer Institute for Machine Tools and Forming Technology IWU, Reichenhainer Straße 88, Chemnitz

09126, Germany^1

Department of Solid Mechanics, Faculty of Mechanical Engineering, Chemnitz University of Technology, Reichenhainer Straße 70, Chemnitz

09126, Germany^2

关键词: Accurate prediction;    Fiber reinforced polymers;    Fiber volume content;    Finite element simulations;    Lightweight application;    Local fiber orientation;    Manufacturing process;    Simulative designs;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/418/1/012128/pdf
DOI  :  10.1088/1757-899X/418/1/012128

来源: IOP

【 摘 要 】

Hybrid parts are strongly moving into the focus for lightweight applications. Unfortunately, the accurate, simulative design, which comprises the accurate prediction of final part geometry, is still a challenging task. In the scope of this paper, an approach to improve the accuracy of appropriate finite element simulations is presented. To this end, the manufacturing history of the hybrid part is considered within the simulation of the part behavior. To create a finite element model of the considered hybrid composite, the intrinsic manufacturing process is modelled first. This includes the modelling of the thermoforming process of a fiber reinforced polymer as well as the sheet metal forming process for the fabrication of form fit elements. Then, the geometry of the hybrid part is deduced from the geometries of the single components. Afterwards, the material properties, including the local fiber volume content as well as the local fiber orientation, are mapped to the finite elements. Consequently, a workflow to create a finite element model which considers manufacturing history is developed and successfully tested.