2022
Reichert, Lisa; Tiemann, Tim; Schmidt, Carsten; Heimbs, Sebastian; Horst, Peter
INVESTIGATION OF NOVEL FE-BASED MODELING APPROACHES FOR STIFFENED CFRP AIRCRAFT STRUCTURES Konferenzbeitrag
In: ECCM20. 26-30 June Composites Meet Sustainability – Proceedings of the 20th European Conference on Composite Materials, 2022 (Hrsg.): 2022.
Abstract | BibTeX | Schlagwörter: composite design, FE-modeling, fuselage structure, omega stiffener, shell structures
@inproceedings{nokey,
title = {INVESTIGATION OF NOVEL FE-BASED MODELING APPROACHES FOR STIFFENED CFRP AIRCRAFT STRUCTURES},
author = {Lisa Reichert and Tim Tiemann and Carsten Schmidt and Sebastian Heimbs and Peter Horst },
editor = {Composites Meet Sustainability – Proceedings of the 20th European Conference on Composite Materials, ECCM20. 26-30 June, 2022, Lausanne, Switzerland},
year = {2022},
date = {2022-06-30},
urldate = {2022-06-30},
abstract = {Reduced representations of stiffened shell structures are required for an efficient FE-based evaluation of different unconventional fuselage stiffener layouts for example in layout optimizations. The use of omega profiles adapted to fiber placement technologies introduces additional challenges. Three different modeling approaches are introduced, each combining a numerical and an analytical model. Two approaches are based on existing numerical models and are combined with analytical models. In the novel third approach, extra shell elements to explicitly model the width of the omega stiffener are added. In an evaluation, the calculated displacements of four characteristic load cases for different wide omega profiles are compared to a reference. The results show small deviations for the new modeling approach. Under tension and bending loads, mean deviations below 1 % are achieved. For torsional loads, the mean deviation can be reduced to 3 % compared to 30 % using a conventional approach.},
keywords = {composite design, FE-modeling, fuselage structure, omega stiffener, shell structures},
pubstate = {published},
tppubtype = {inproceedings}
}
Reduced representations of stiffened shell structures are required for an efficient FE-based evaluation of different unconventional fuselage stiffener layouts for example in layout optimizations. The use of omega profiles adapted to fiber placement technologies introduces additional challenges. Three different modeling approaches are introduced, each combining a numerical and an analytical model. Two approaches are based on existing numerical models and are combined with analytical models. In the novel third approach, extra shell elements to explicitly model the width of the omega stiffener are added. In an evaluation, the calculated displacements of four characteristic load cases for different wide omega profiles are compared to a reference. The results show small deviations for the new modeling approach. Under tension and bending loads, mean deviations below 1 % are achieved. For torsional loads, the mean deviation can be reduced to 3 % compared to 30 % using a conventional approach.