Manufacturable insight into modelling and design considerations in fibre-steered composite laminates: State of the art and perspective

Aragh, B. Sobhani; Farahani, E. Borzabadi; Xu, Bin; Ghasemnejad, H.; Mansur, Webe João

doi:10.1016/j.cma.2021.113752

Cited by 24 publications

(5 citation statements)

References 179 publications

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“…Lastly, it is not possible to lay the fibers in a controlled manner if their length is shorter than a certain value called minimum cut length. For a comprehensive review on modeling and design considerations for fiber-steered composite laminates, see (Aragh et al 2021) and the references therein.…”

Section: Introductionmentioning

confidence: 99%

Efficient spline design via feature-mapping for continuous fiber-reinforced structures

Greifenstein

Letournel

Stingl

et al. 2023

Struct Multidisc Optim

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We present a feature-mapping topology optimization approach, in which curved features are parametrized as piecewise linear splines smoothly rounded by arcs. The motivation for our contribution to the tool set of feature-mapping methods is the optimization of structures manufactured by variable angle continuous fiber-reinforced filaments. For this reason, the feature’s geometry should be able to represent long, curved fiber objects satisfying manufacturing constraints, such as minimum turning radius. The proposed model has been chosen with special care for rigorous continuous differentiability, as well as an efficient analytical evaluation of the signed distance field to the spline. The geometrical description and sensitivity analysis of the spline model are developed fully analytically and then mapped to a discretized pseudo-density field for finite element analysis. For the fiber-reinforced material formulation, we also present a new combine step for individual features, in which the best possible angle for the combined features is searched. The model and results are presented in a two-dimensional setting.

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Section: Introductionmentioning

confidence: 99%

Efficient spline design via feature-mapping for continuous fiber-reinforced structures

Greifenstein

Letournel

Stingl

et al. 2023

Struct Multidisc Optim

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“…During the lamination is possible to tailor the directional dependence of strength and stiffness of a laminate to match the design loadings, which actuate in the composite structures (Jones 1999) Usually, the laminas are reinforced by unidirectional fibers, which underestimate the potential of these materials in structural applications. However, due to the developments in robotics, new manufacturing processes such as TFP (Tailored Fiber Placement), AFP (Automated Fiber Placement), and CTS (Continuous Tow Shearing) have become a way to produce more optimized composite structures (Sobhani Aragh et al 2021). These materials will be referred to as Variable Axial (VA) composites in the current paper, and their advantage is to steer the fibers to modify the stiffness and strength in situ.…”

Section: Introductionmentioning

confidence: 99%

A Multiobjective Optimization Framework for Strength and Stress Concentration in Variable Axial Composite Shells: A metaheuristic approach

Santana

Gomes

Ferreira

et al. 2023

Lat. Am. j. solids struct.

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A metaheuristic approach for variable axial composites considering multiobjective optimization is investigated. The proposed methodology is based on the combination of three main parts: a methodology for defining the orientation of the fibers in the laminate, a structural analysis program (based on the Finite Element Method) and an optimization algorithm. It is important to highlight that a radial basis function (RBF), which describes a smooth fiber pattern, is generated using control points. The novelties of the present methodology consist of a proposal for a generalized parameterization technique, which allows the investigation of mechanical strength and stress concentration of variable axial composites. Thus, NSGA-II multiobjective genetic algorithm is used as optimization tool to define the fiber orientations. Besides, ax metaheuristic approach is used in situations when it is desirable to simultaneously minimize the stress concentration factor (𝐾𝐾 𝑡𝑡 ) and a failure criterion index (𝐹𝐹𝐹𝐹 or Φ). Two case studies are investigated: a double notched plate and a tube with a transverse hole.

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“…Among these materials, fiber-reinforced composites stand out, especially carbon fibers, which associated with polymer matrices form a class called CFRP (Carbon Fiber-Reinforced Polymers). CRFPs, in addition to having high stiffness, develop an excellent ratio between weight and mechanical strength, good adhesion between fibers and matrix, low rates of corrosion and creep, and a high number of cycles to fatigue failure (Aragh et al, 2021;Wu, Raju, Weaver, 2018). In traditional applications, these materials maintained a regular positioning, with straight and equidistant reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Optimization of plates reinforced with different initial slope and variable number of carbon fibers

Vieira

Leon

Marczak

2023

Lat. Am. j. solids struct.

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Optimization methods for curvilinear reinforcements placement aims to improve mechanical response of structure. Whenever a gradient-based method is used to optimization, it is necessary arbitrate an initial placement for the fibers. This initial guess has influence on the result. This work aims to observe the influence of the initial positioning of straight carbon fiber in epoxy resin plates, which had their compliance minimized by Sequential Linear Programming. The maximum displacement is observed too, even if it is not an objective function. The case studies were carried out on the same structure and the number of fibers and its slope were changed. Variation of the force slope was also evaluated. The results confirmed an influence of the initial slope in results. The addition of a greater number of fibers does not always cause a better performance in the design. To achieve the best results, it is essential that the initial arrangement be configured in such a way as to provide proximity of the ends of the fibers and the forces and supports. It's important to try to place the fibers with axial directions close to the axial direction of the force.

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Manufacturable insight into modelling and design considerations in fibre-steered composite laminates: State of the art and perspective

Cited by 24 publications

References 179 publications

Efficient spline design via feature-mapping for continuous fiber-reinforced structures

Efficient spline design via feature-mapping for continuous fiber-reinforced structures

A Multiobjective Optimization Framework for Strength and Stress Concentration in Variable Axial Composite Shells: A metaheuristic approach

Optimization of plates reinforced with different initial slope and variable number of carbon fibers

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