Computational optimisation strategies of tailored fibre placement in polymer matrix composites based on local shear stress minimisation

Sprache des Vortragstitels:

Englisch

Original Tagungtitel:

Computational Methods for Coupled Problems in Science and Engineering V

Sprache des Tagungstitel:

Englisch

Original Kurzfassung:

Continuous fibre reinforced polymer matrix composites exhibit a challenging anisotropic material
behaviour which allows the design of high performance structures [1,2]. In many practical
applications, structural components are built up by layers of straight fibre reinforcements. These
components show adequate thermomechanical properties with respect to multiaxial loading
conditions.
However, if only a well defined set of loading conditions is applied, structure weight and costs can be
saved by tailored fibre placement (TFP) [2,3]. Covering general stress levels by a basis material and
apply adequate tailored fiber reinforcement to those areas where local stress levels are occuring
during the loading paths, is the basic idea of TFP. As a consequence TFP leads to weight reduction of
structural components. Therefore in manufacturing it is the goal laying up as less fibre
reinforcements as possible, however, sufficient enough subject to the specific loading conditions.
This requires proper computational optimisation strategies which deliver the local fibre orientation
such that local arising shear stresses are minimised. A widely used method is aligning continuous
fibre reinforcements along the principle stress trajectories.
In engineering applications the principle stress trajectories are calculated by FEM analysis for
structural components with pure isotropic material behaviour. To reduce computational costs in such
approaches the coupling between stress state and fibre orientation during the optimisation procedure
is neglected.
The aim of this paper is to present optimisation strategies of TFP in polymer matrix composites using
FEM analysis with the principle stress criterion. In this work we will shed some light on the
differences of typical engineering approaches which are state of the art for TFP and full consistent
schemes where stress states and fibre orientation are coupled.

Sprache der Kurzfassung:

Englisch

Vortragstyp:

Hauptvortrag / Eingeladener Vortrag auf einer Tagung