A design algorithm to model fibre paths for manufacturing of structurally optimised composite laminates
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TLDR
This work develops a design for manufacturing (DFM) tool for the introduction in design of the manufacturing requirements and limitations derived from the fibre placement technology, which enables the automatic generation of continuous fibre paths for manufacturing.About:
This article is published in Composite Structures.The article was published on 2018-11-15 and is currently open access. It has received 14 citations till now. The article focuses on the topics: Design for manufacturability & Composite laminates.read more
Figures
Figure 9. Flat square plate with a hole: reference paths optimised for structures and paths optimised for manufacturing with gap and overlap analysis for each ply (green: gap and blue: overlap) 
Figure 2. Curve smoothing approach to comply with minimum turning radius constraint 
Table 2. Analysis of results of ply 4 of flat square plate with a hole showing angle deviations, gaps and overlaps, and tow-drops that would be needed to remove the overlaps 
Table 3. Analysis of results for the design of reference (Ref) and manufacturing (Mfg) fibre paths of windshield front fairing Case study Windshield front fairing Ply orientation (deg) 0 45 90 Description Ref. 
Figure 1. Approach for fibre path modelling for manufacturing, including for each step (boxes): input and output variables (left and right side of boxes), conditions and constraints applicable (in bold at top side of boxes), and enablers and algorithms used (in italic at bottom side of boxes). 
Figure 3. (a) Case study used and representation of modelled curves; (b) graph of the effect of refinement of interpolation on computation time; (c) graph of the effect of refinement on average angle deviation
Citations
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Journal ArticleDOI
3D printing of optimized composites with variable fiber volume fraction and stiffness using continuous fiber
Kentaro Sugiyama,Ryosuke Matsuzaki,Andrei V. Malakhov,Alexander N. Polilov,Masahito Ueda,Akira Todoroki,Yoshiyasu Hirano +6 more
TL;DR: In this article, the authors optimized the curved fiber trajectories to realize variable fiber volume fraction and stiffness composites (VVfSC) using a continuous fiber composite 3D printer.
Journal ArticleDOI
Manufacturing-Induced Imperfections in Composite Parts Manufactured via Automated Fiber Placement
Falk Heinecke,Christian Willberg +1 more
TL;DR: The state of the art in modelling gaps and overlaps and assessing their influence on mechanical properties is presented and the research gaps and remaining issues are identified.
Journal ArticleDOI
An efficient semi-analytical framework to tailor snap-through loads in bistable variable stiffness laminates
TL;DR: In this paper, a semi-analytical model was proposed to compute the snap-through forces of bistable variable stiffness (VS) laminates with curvilinear fiber paths.
Journal ArticleDOI
Manufacturable insight into modelling and design considerations in fibre-steered composite laminates: state of the art and perspective
TL;DR: In this article, the authors summarize and discuss underlying fiber placement technologies including tailored fiber placement (TFP), continuous tow shearing (CTS), and automated fibre placement (AFP), followed by a detailed discussion on the manufacturing limitations and constraints of the AFP process.
Journal ArticleDOI
Optimization of variable stiffness laminates with gap-overlap and curvature constraints
TL;DR: In this paper, the gap-overlap and curvature constraints on fiber tows are considered in the design optimization of variable stiffness laminates, and the problem of compliance minimization with manufacturability constraints is solved with the MMA optimization algorithm.
References
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Book
Differential geometry of curves and surfaces
TL;DR: This paper presents a meta-geometry of Surfaces: Isometrics Conformal Maps, which describes how the model derived from the Gauss Map changed over time to reflect the role of curvature in the model construction.
Journal ArticleDOI
A Class of Globally Convergent Optimization Methods Based on Conservative Convex Separable Approximations
TL;DR: This paper deals with a certain class of optimization methods, based on conservative convex separable approximations (CCSA), for solving inequality-constrained nonlinear programming problems, and it is proved that the sequence of iteration points converges toward the set of Karush--Kuhn--Tucker points.
Journal ArticleDOI
The engineering aspects of automated prepreg layup: History, present and future
TL;DR: Automated Tape Laying (ATL) and Automated Fibre Placement (AFP) are the two main technologies used to automate the layup of prepreg as mentioned in this paper, with an emphasis on past issues in application and capability as well as their solution.
Journal ArticleDOI
In-plane response of laminates with spatially varying fiber orientations - Variable stiffness concept
Zafer Gürdal,Reynaldo Olmedo +1 more
TL;DR: In this paper, a solution to the plane elasticity problem for a symmetrically laminated composite panel with spatially varying fiber orientations has been obtained, and the effects of the variable fiber orientation on the displacement fields, stress resultants and global stiffness are analyzed.
Journal ArticleDOI
Optimum stacking sequence design of composite materials Part II: Variable stiffness design
TL;DR: In this paper, a composite laminate may be designed as a permutation of several straight-fiber layers or as a matrix embracing fibers positioned in curvilinear paths.