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Path Planning Based on Ply Orientation Information for Automatic Fiber Placement on Mesh Surface

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This article introduces an investigation of path planning with ply orientation information for automatic fiber placement (AFP) on open-contoured mesh surface. The new method makes use of the ply orientation information generated by loading characteristics on surface, divides the surface into several zones according to the ply orientation information and then designs different fiber paths in different zones. This article also gives new idea of up-layer design in order to make up for defects between parts and improve product’s strength.
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Path Planning Based on Ply Orientation Information
for Automatic Fiber Placement on Mesh Surface
Jiazhi Pei
1
&Xiaoping Wang
1
&Jingyu Pei
1
&
Ya n g Ya n g
1
Received: 11 February 2018 / Accepted: 15 February 2018 /Published online: 10 March 2018
#Springer Science+Business Media B.V., part of Springer Nature 2018
Abstract This article introduces an investigation of path planning with ply orientation
information for automatic fiber placement (AFP) on open-contoured mesh surface. The new
method makes use of the ply orientation information generated by loading characteristics on
surface, divides the surface into several zones according to the ply orientation information and
then designs different fiber paths in different zones. This article also gives new idea of up-layer
design in order to make up for defects between parts and improve productsstrength.
Keywords AFP.Pathplacement planning.Fiber placement .Ply orientation information .Mesh
surface
1 Introduction
Fiber reinforcement composite was born at 1960s, with high strength-to-weight ratio and
stiffness-to -weight ratio [1]. It was used widely in aerospace industries, because of its ideal
properties. However, the composites characteristics arent beneficial for processing, compared
with traditional structural material. Actually, many developed countries, such as America,
Germany, France, have largely used automated tape placement (ATP) and automatic fiber
placement (AFP) technology in producing fiber reinforced composite. In addition to ATP, AFP
[24] also provides more flexible ways to make fiber tows to be placed on mould surface using
so-called automated fiber placement machine.
In automatic fiber placement, path planning is one of the key technologies. It is also a quite
complicated process to implement, for which one must consider simultaneously many factors
such as fiber affordability, interference between placement head or compaction roller, geomet-
ric constraints, mechanical constraints and much more. This technology directly affects the
Appl Compos Mater (2018) 25:14771490
https://doi.org/10.1007/s10443-018-9678-0
*Jiazhi Pei
pei_jia_zhi@163.com
1
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and
Astronautics, Nanjing 210016, China
Content courtesy of Springer Nature, terms of use apply. Rights reserved.
... As an automatic and most advanced manufacturing technique for producing fibre-reinforced composite components, efficient and reasonable trajectory generation tactics are the key factors to determine the quality and efficiency of fibre placement and are directly related to the success or failure of fibre placement as well as performance of formed components. The existing approaches of trajectory generation for AFP are mainly based on the moulds with parameter form [7][8][9][10][11][12] or mesh form [13][14][15][16]. proposed a path planning algorithm for open-contoured structures and entitled the surface curve algorithm for AFP. This algorithm formulates a set of paths by offsetting surface curves. ...
... Zhang et al. [15] also planned the towpaths adopting the Fast Marching Method. For the mesh surface, Pei et al. [16] designed the fibre paths with the ply orientation information generated by loading characteristics on surface. Scheirer et al. [14] presented a new two-step process for defining optimal composite fibre paths and finite element analysis models. ...
... (15) and adopting an appropriate numerical approach (see Appendix D), the initial trajectory ( ) with discrete form is acquired. Generally, the initial conditions in Eq. (16) are taken as the coordinate of endpoint . ...
... The final full placement paths are often formed by equidistant offsetting or propagating the initial path [42][43]. ...
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It is possible to create laminae that have spatially varying fiber orientation with a tow placement machine. A laminate which is composed of such plies will have sti#ness properties which vary as a function of position. Previous work had modelled such variable-sti#ness laminae by taking a reference fiber path and creating subsequent paths by shifting the reference path. This thesis introduces a method where subsequent paths are truly parallel to the reference fiber path. The primary manufacturing constraint considered in the analysis of variable-sti#ness laminates was limits on fiber curvature which proved to be more restrictive for parallel fiber laminae than for shifted fiber. The in-plane responses of shifted and parallel fiber variable-sti#ness laminates to either an applied uniform end shortening or in-plane shear were determined. Both shifted and parallel fiber variable-sti#ness laminates can redistribute the applied load thereby increasing critical buckling loads compared to traditional straight fiber laminates. The primary di#erences between the two methods is that parallel fiber laminates are not able to redistribute the loading to the degree of the shifted fiber. This significantly reduces the increase in critical buckling load for parallel fiber variable-sti#ness laminates over straight fiber laminates.
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