Fundamental frequency optimization of variable angle tow laminates with embedded gap defects
Date
2022
Authors
Carvalho, João
Sohouli, Abdolrasoul
Suleman, Afzal
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Composites Science
Abstract
Variable stiffness composite laminates can improve the structural performance of composite structures by expanding the design space. This work explores the application of variable stiffness laminated composite structures to maximize the fundamental frequency by optimizing the tow angle. To this end, an optimization framework is developed to design the fiber angle for each layer based on the maximization of the fundamental frequency. It is assumed that the design process includes the manufacturing constraints encountered in the automated fiber placement process and a linear fiber angle variation. The current study improves existing results by considering embedded gap defects within the optimization framework. The plates are assumed symmetric, with clamped and simply supported boundary conditions. The optimal results and a comparison between the non-steered and steered plates with and without gaps are presented. Results show that, although gaps deteriorate the structural performance, fiber steering can still lead to an increase in the fundamental frequency depending on the plate’s geometry and boundary conditions.
Description
Keywords
variable stiffness composite, variable angle tow, automated fiber placement, Defect Layer Method, natural frequency, genetic algorithm optimization
Citation
Carvalho, J., Sohouli, A., & Suleman, A. (2022). “Fundamental frequency optimization of variable angle tow laminates with embedded gap defects.” Journal of Composites Science, 6(2), 64. https://doi.org/10.3390/jcs6020064