Steady-state modelling and analysis of process-induced stress and deformation in thermoset pultrusion processes

Journal article (2021)

Authors

Michael Sandberg Technical University of Denmark
O. Yuksel University of Twente
Ismet Baran University of Twente
Jon Spangenberg Technical University of Denmark
Jesper H. Hattel Technical University of Denmark
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Residual stresses Streamline integration Pultrusion Composite processing Eulerian solid mechanics Process-induced deformation Thermo-chemical-mechanical modelling
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Published Date

2021

Language

English

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Abstract

Process-induced stress and deformation are critical factors when ensuring product quality and structural integrity of composite profiles manufactured using thermoset pultrusion processes. In this paper, we present a new steady-state 3D-Eulerian numerical framework that enables 9–35 times faster computations compared to the current state-of-the-art quasi-static 3D-methods. In addition, we show how process-induced effects from the profile-advancing pulling force and an initial compressive stress state can be modelled. We demonstrate in theoretical parameter studies that the pulling force advances die-detachment and reduces die-swelling, while the initial compressive stress state has the opposite but a more pronounced effect.