Publisher DOI: 10.1016/j.cma.2021.113851
Title: A variable-fidelity hybrid surrogate approach for quantifying uncertainties in the nonlinear response of braided composites
Language: English
Authors: Balokas, Georgios  
Kriegesmann, Benedikt  
Czichon, Steffen 
Rolfes, Raimund 
Keywords: Braided composites;Failure prediction;Sensitivity analysis;Surrogate modeling;Uncertainty quantification;Variable-fidelity
Issue Date: Aug-2021
Source: Computer Methods in Applied Mechanics and Engineering 381: 113851 (2021-08)
Journal or Series Name: Computer methods in applied mechanics and engineering 
Abstract (english): 
The ultimate strength prediction of textile composite materials requires high-fidelity FE modeling with information-passing multiscale schemes and damage initiation and propagation algorithms. The numerical demand of this procedure together with the complexity of the observed response surface, hampers the quantification of uncertainties contributing to the scatter of strength values. This study proposes a surrogate methodology able to efficiently emulate the nonlinear multiscale procedure, based on a combination of artificial neural networks and Kriging modeling under a variable-fidelity framework. A triaxially braided textile under longitudinal tension is used as a use-case and the methodology is employed to identify the most critical parameters in terms of variance via a global sensitivity analysis technique. Results show strong interaction effects between the uncertain parameters. The approach is non-intrusive and can be easily extended to other types of textiles and load cases.
ISSN: 0045-7825
Institute: Strukturoptimierung im Leichtbau M-EXK1 
Document Type: Article
Project: FULLy integrated analysis, design, manufacturing and health-monitoring of COMPosite structures 
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