Steered fiber paths for improved in-plane compressive response of aerostructural panels: Experimental studies and numerical modeling

Results for the manufacturing and structural testing of steered fiber composite panels are presented in this paper. A detailed algorithm and implementation of a surrogate model based optimization procedure in conjunction with a global optimizer such as multi-objective Genetic Algorithm (GA) was intr...

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Bibliographic Details
Published inComposite structures Vol. 289; p. 115426
Main Authors Vijayachandran, Avinkrishnan A., Waas, Anthony M.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2022
Subjects
Automated fiber placement
Buckling
Manufacturing defects
Transition loads
Automated fiber placement
Manufacturing defects
Buckling
Transition loads
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Summary:Results for the manufacturing and structural testing of steered fiber composite panels are presented in this paper. A detailed algorithm and implementation of a surrogate model based optimization procedure in conjunction with a global optimizer such as multi-objective Genetic Algorithm (GA) was introduced for steered fiber composite panels in previous studies by the authors . Three designs were chosen based on the criteria that the total gain in mass be less than 10%, the decrease in global stiffness capped at 10% and more than 25% increase in buckling load compared to a unidirectional laminate. By necessity, the optimal designs incorporated manufacturing induced unintended deviations also known as manufacturing signature(MS). Details of a pixelated Finite Element model to capture as-manufactured behavior of these panels including initial curvature and thickness variations are discussed in detail, and the numerical results are compared against results from the experimental study.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2022.115426