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Journal articles on the topic 'Fiber placement'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Kozaczuk, Konrad. "AUTOMATED FIBER PLACEMENT SYSTEMS OVERVIEW." Transactions of the Institute of Aviation 245, no. 4 (2016): 52–59. http://dx.doi.org/10.5604/05096669.1226355.

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2

Jeffries, Kyle A. "Enhanced Robotic Automated Fiber Placement with Accurate Robot Technology and Modular Fiber Placement Head." SAE International Journal of Aerospace 6, no. 2 (2013): 774–79. http://dx.doi.org/10.4271/2013-01-2290.

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3

Bohler, Patrick, Stefan Carosella, Christopher Goetz, and Peter Middendorf. "Path Definition for Tailored Fiber Placement Structures Using Numerical Reverse Draping Approach." Key Engineering Materials 651-653 (July 2015): 446–51. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.446.

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The properties of fiber reinforced materials are depending on the fiber direction. During draping processes - which are necessary to form complex structures - the fiber direction and therefore the resulting properties of the final part are changing.To ensure that the fibers in the final complex structure are placed exactly in the direction needed, a new approach is investigated.The idea is to define the orientation of the reinforcement fibers based on the distribution of forces in a complex structure under certain loading determined by a structural simulation. Best lightweight behavior is achi

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Dong, Heng, and Su Li Feng. "Reinforcement and Fiber to Induce Ductile Behavior of Ultra High Performance Steel Fiber Concrete." Applied Mechanics and Materials 351-352 (August 2013): 199–202. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.199.

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To induce the ductile behavior of ultra high performance concrete beams, the experiments to find out the best composition of volume fraction of steel fiber and ratio of reinforcement bar were carried out. 15 UHPC beams which have various combinations of volume fraction of steel fiber and ratio of reinforcement bar. The reinforcement bars was consist of 2×1, 3×3, 4×4, 5×4. The volume fractions of steel fibers were 0%, 0.7%, 1%, 1.5%, 2%. The beam which has 0% volume fraction with the close placement reinforcement bar has little effect on ductile behavior. At least 0.7% volume fraction with the

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Rimmel, Oliver, and David May. "Modeling transverse micro flow in dry fiber placement preforms." Journal of Composite Materials 54, no. 13 (2019): 1691–703. http://dx.doi.org/10.1177/0021998319884612.

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Dry fiber placement has a large potential for manufacturing preforms for primary-load components at minimum scrap rate and fiber crimp. Yet, challenging impregnation behavior due to low permeability of these preforms during liquid composite molding imposes a need for further research to optimize preform structure for higher permeability. For full understanding of flow behavior within these preforms, flow has to be considered on micro scale (in between single fibers), on meso scale (in between single rovings or strands), and on macro scale (on scale of parts to be manufactured). While macro and

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6

Honda, Shinya. "Multi-Objective Optimization of Variable-Stiffness Composites Fabricated by Tailored Fiber Placement Machine." EPI International Journal of Engineering 2, no. 1 (2019): 14–18. http://dx.doi.org/10.25042/epi-ije.022019.04.

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A multi-objective optimization method for the laminated composite fabricated by a tailored fiber placement machine that is an application of embroidering machine is presented. The mechanical properties of composite with curvilinear fibers including stiffness, volume fraction, and density are variable depending on curvatures of fibers. The present study first measures the relation between curvatures and mechanical properties. The measured results indicate that the stiffness of composite decreases linearly as the curvature increases. Then, the obtained relation is applied to the multi-objective

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Brecher, C., D. Werner, and M. Emonts. "Leichtbau-Produktion mit flexibler Anlagentechnik*/Lightweight production in a configurable system – Production of fiber-reinforced components with a multifunctional tape and fiber placement system." wt Werkstattstechnik online 105, no. 09 (2015): 586–90. http://dx.doi.org/10.37544/1436-4980-2015-09-28.

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Zur Fertigung belastungsoptimierter faserverstärkter Strukturbauteile mit Tape- oder Fiber-Placement-Verfahren kommen vermehrt robotergeführte Systeme zur Anwendung. Im Gegensatz zu den aus der Luftfahrtindustrie bekannten Portalsystemen werden so Anlagenkosten gesenkt und neue Anwendungsfelder erschlossen. Um die Maschinenauslastung zu steigern, müssen auch Tape- oder Fiber-Placement-Systeme die flexible Fertigung faserverstärkter Komponenten in verschiedenen Prozessketten ermöglichen. &nbsp; Automated manufacturing of load optimized fiber-reinforced composite structures by using tape and

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8

Schmidt, Carsten, Klaas Völtzer, Tristan Hocke, and Jan Brüning. "Bahnplanung für Automated-Fiber-Placement-Prozesse." Lightweight Design 9, no. 4 (2016): 26–31. http://dx.doi.org/10.1007/s35725-016-0038-4.

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9

Khodunov, A. A., V. V. Bogachev, and A. S. Borodulin. "Advances in tailored fiber placement technology." Journal of Physics: Conference Series 1990, no. 1 (2021): 012041. http://dx.doi.org/10.1088/1742-6596/1990/1/012041.

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10

Čajka, Radim, Martina Smirakova, and Pavlina Matečková. "Frequent Failures of FRC Industrial Floors." Key Engineering Materials 738 (June 2017): 217–26. http://dx.doi.org/10.4028/www.scientific.net/kem.738.217.

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Floors in industrial buildings are often loaded with heavy traffic or stored material. For this reason floors are often created by fiber-reinforced concrete. Fibers contribute to larger impact - or abrasion resistance. The issue of design of fiber concrete slabs is quite complicated. Poorly designed layer structure under slabs or poorly subsoil can have very important effect of result properties and create the first group of source of problem. The second group of causes of problems is real implementation of concrete slab primarily the amount of fibers and correct and even placement. If amount

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11

Nik, Mahdi Arian, Larry Lessard, and Damiano Pasini. "Size-dependent behavior of laminates with curvilinear fibers made by automated fiber placement." Science and Engineering of Composite Materials 22, no. 2 (2015): 157–63. http://dx.doi.org/10.1515/secm-2014-0167.

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AbstractVariable stiffness laminates can be manufactured using curvilinear fiber paths. A curvilinear fiber path is generally defined based on the plate size and has a curvature that is dependent on the plate size. In practice, however, the fiber path must satisfy manufacturing constraints, such as the minimum turning radius imposed by the automated fiber placement machine, thereby limiting the possible amount of fiber steering. In this work, we studied the effect of the plate size on the structural properties of a plate manufactured with curvilinear fibers. We considered four plate sizes, whi

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Oromiehie, Ebrahim, B. Gangadhara Prusty, Paul Compston, and Ginu Rajan. "Characterization of process-induced defects in automated fiber placement manufacturing of composites using fiber Bragg grating sensors." Structural Health Monitoring 17, no. 1 (2017): 108–17. http://dx.doi.org/10.1177/1475921716685935.

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With the increasing use of automated fiber placement method for manufacturing highly precise bespoke composite components in the aerospace industry, the level of manufacturing defects within the laminate structure needs to be monitored and minimized for structural integrity. One of the main common defects in automated fiber placement process is misalignment between the tape paths in successive courses which leads to non-integrity of laminate and consequently significant reduction in mechanical strength of the laminate. Therefore, it is necessary to find an appropriate inspection method to moni

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13

Li, Yue Hua, Hong Ya Fu, and Zhong Xi Shao. "The Influence of Preheating on Automated Fiber Placement Speed." Advanced Materials Research 213 (February 2011): 136–42. http://dx.doi.org/10.4028/www.scientific.net/amr.213.136.

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The influence of preheating adopted and preheating unadopted on manufacturing speed during the automated fiber placement process has been analyzed. According to Fourier heat equation and assuming the towpreg with uniform material properties, a heat transfer model of towpreg has been established. The boundary conditions and initial conditions of this model at different stages have been given based on energy exchange principle. The research chooses thermoplastic composite APC-2(carbon/PEEK) as the towpreg material and utilizes the finite element method to investigate the temperature history of t

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14

Chen, Hong Ren, and Yi Yong Yao. "The Method of Tension Control with Gravity Balance." Applied Mechanics and Materials 590 (June 2014): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amm.590.3.

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Carbon fiber is a fiber material, so the tension must be kept constant in the placement process. The attitude of carbon fiber placement head will change with the change of a placement path. Focusing on the problem of tension fluctuation caused by the attitude of carbon fiber placement head, gravity balance characteristic of symmetrical objects is adopted to propose a tension control method for eliminating the tension fluctuation and tension measuring error caused by gravity. In this way, the tension is kept constant depending on tension feedback control. Mathematical model and theoretical anal

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15

Zhang, Ji Fa, Dong Li Xu, and Zhi Hui Wang. "Modeling Approach for Fiber Placement Routes on Complex Surface." Applied Mechanics and Materials 686 (October 2014): 560–66. http://dx.doi.org/10.4028/www.scientific.net/amm.686.560.

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According to the characteristics of a curve on the surface, the correlation between the placement feasibility for fiber tow and the surface shape of a composite component, width of the fiber tows is analyzed. The placement process route under the condition of fiber tow ultimate deformation is calculated. In addition, based on fiber loading orientation in the designed placement layers, the best mechanical route is calculated. Through the given proportionality coefficient of geodesic arc radii under the constrain conditions of the mechanics and fiber tow deformability on the present route point,

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16

Bittrich, Lars, Axel Spickenheuer, José Humberto S. Almeida, Sascha Müller, Lothar Kroll, and Gert Heinrich. "Optimizing Variable-Axial Fiber-Reinforced Composite Laminates: The Direct Fiber Path Optimization Concept." Mathematical Problems in Engineering 2019 (February 19, 2019): 1–11. http://dx.doi.org/10.1155/2019/8260563.

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The concept of aligning reinforcing fibers in arbitrary directions offers a new perception of exploiting the anisotropic characteristic of the carbon fiber-reinforced polymer (CFRP) composites. Complementary to the design concept of multiaxial composites, a laminate reinforced with curvilinear fibers is called variable-axial (also known as variable stiffness and variable angle tow). The Tailored Fiber Placement (TFP) technology is well capable of manufacturing textile preforming with a variable-axial fiber design by using adapted embroidery machines. This work introduces a novel concept for si

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17

Schueler, Kurt, James Miller, and Richard Hale. "Approximate Geometric Methods in Application to the Modeling of Fiber Placed Composite Structures." Journal of Computing and Information Science in Engineering 4, no. 3 (2004): 251–56. http://dx.doi.org/10.1115/1.1736685.

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Fiber placement is a modern method of constructing composite structures with complex curved surfaces. Modeling individual tows in a fiber placed part constitutes the challenge addressed by methods presented in this paper. One method is presented to approximate offset curves on a free form surface using the geometric constraints of the fiber placement process. A second method is presented to approximate a curve on a free form surface that can be used to generate a laminate family ply. We demonstrate that these approximation methods are sufficient for the accuracy of the fiber placement machine.

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18

Mattheij, Paul, Konrad Gliesche, and Dirk Feltin. "Tailored Fiber Placement-Mechanical Properties and Applications." Journal of Reinforced Plastics and Composites 17, no. 9 (1998): 774–86. http://dx.doi.org/10.1177/073168449801700901.

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19

Ashir, Moniruddoza, Andreas Nocke, and Chokri Cherif. "Adaptive fiber-reinforced plastics based on open reed weaving and tailored fiber placement technology." Textile Research Journal 90, no. 9-10 (2019): 981–90. http://dx.doi.org/10.1177/0040517519884578.

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The textile-technical integration of shape memory alloys into reinforcing fabrics for the development of adaptive fiber-reinforced plastics (FRPs) has been developed in recent years. This is aimed at reproduction, automation, and series production as well as reduced delamination of shape memory alloys in FRPs, and higher force transmission from shape memory alloys to FRPs. This type of integration can be executed in several ways, for example, by weaving or by tailored fiber placement technology. We present a comparative study of the functional properties of adaptive FRPs based on both types of

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20

Aziz, A. R., M. A. Ali, X. Zeng, R. Umer, P. Schubel, and W. J. Cantwell. "Transverse permeability of dry fiber preforms manufactured by automated fiber placement." Composites Science and Technology 152 (November 2017): 57–67. http://dx.doi.org/10.1016/j.compscitech.2017.09.011.

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21

Cheng, Jinxiang, Dongbiao Zhao, Huaiyuan Chen, Yingru Zhang, and Yangwei Wang. "Effect of the attitude fine-adjustment of compaction roller on automated fiber placement defects and trajectory." Journal of Reinforced Plastics and Composites 38, no. 12 (2019): 539–55. http://dx.doi.org/10.1177/0731684419832794.

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Automated fiber placement shows great potential for fabricating complex aircraft structures. During AFP process, the process-induced defects and placement trajectory have important effect on the processing quality. These defects and trajectory are influenced by many factors, where the attitude of compaction roller is an important factor. By the attitude fine-adjustment of compaction roller, the placement defects and trajectory can be improved. It is necessary to study the effect of the attitude fine-adjustment of compaction roller on placement defects and trajectory. The attitude includes yaw

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22

Snyder, G. K. "Estimating diffusion distances in muscle." Journal of Applied Physiology 63, no. 5 (1987): 2154–58. http://dx.doi.org/10.1152/jappl.1987.63.5.2154.

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Models of fibers and capillaries in cross sections of muscle were used to quantify the relationships between diffusion distances and tissue capillarity. The fibers were constructed as square and hexagonal arrays, and the placement of capillaries around the perimeters of the fibers ordered them in similar arrays. Diffusion distances were measured as the percent cumulative frequency of fiber area within a given distance of a capillary when capillary-to-fiber ratio was increased from 0.5 to 4.0. Equations fitted to the data make it possible to estimate diffusion distances in muscle and to correla

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23

Kollmannsberger, Andreas, Roland Lichtinger, Franz Hohenester, Christoph Ebel, and Klaus Drechsler. "Numerical analysis of the temperature profile during the laser-assisted automated fiber placement of CFRP tapes with thermoplastic matrix." Journal of Thermoplastic Composite Materials 31, no. 12 (2017): 1563–86. http://dx.doi.org/10.1177/0892705717738304.

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In this study, a thermodynamic model of a laser-assisted automated thermoplastic fiber placement process is developed and validated. The main focus is on modeling the heat transfer into the composite with a laser heat source, the thermal properties of the tape, and the resulting heat distribution in the part, the mold, and the compaction roller. A new integrated analytical method is presented to calculate the energy input of the laser based on the geometric boundary conditions, including first-order reflection and laser shadow. The carbon fiber/polyethersulphone tape is modeled by combining li

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24

Rihaczek, Gabriel, Maximilian Klammer, Okan Başnak, et al. "Curved Foldable Tailored Fiber Reinforcements for Moldless Customized Bio-Composite Structures. Proof of Concept: Biomimetic NFRP Stools." Polymers 12, no. 9 (2020): 2000. http://dx.doi.org/10.3390/polym12092000.

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Fiber Reinforced Polymers (FRPs) are increasingly popular building materials, mainly because of their high strength to weight ratio. Despite these beneficial properties, these composites are often fabricated in standardized mass production. This research aims to eliminate costly molds in order to simplify the fabrication and allow for a higher degree of customization. Complex three-dimensional shapes were instead achieved by a flat reinforcement, which was resin infused and curved folded into a spatial object before hardening. Structural stability was gained through geometries with closed cros

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25

Liu, Yi, Qiang Fang, and Yinglin Ke. "Modeling of Tension Control System with Passive Dancer Roll for Automated Fiber Placement." Mathematical Problems in Engineering 2020 (April 30, 2020): 1–11. http://dx.doi.org/10.1155/2020/9839341.

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The fiber tension should be kept constant during the automated placement of fiber prepreg. The velocity of the fiber placement end-effector moving on complex aircraft panel mould surface varies rapidly, which greatly disturbs the precision of tension control. This paper proposes a tension control strategy combining active control and passive control. The pay-off motor controls the fiber tension directly and a passive dancer roll is designed theoretically as the equipment for attenuation of tension disturbance to realize the real-time compensation of low-frequency velocity variations. The nonli

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Wang, Zhi Bin, Zhen Yu Han, Hua Lu, and Hong Ya Fu. "A Review of Tensioner for Automated Fiber Placement." Advanced Materials Research 740 (August 2013): 183–87. http://dx.doi.org/10.4028/www.scientific.net/amr.740.183.

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For automated fiber placement machine, tensioner is one of the important modules, which precisely generates and controls the tension of fibers.This paper performs a system analysis and synthesis of the key technologies of tensioner in recent years by summing up the development course of the tensioner. A new type of tensioner specially designed for fiber placment technology is presented. Experiments results prove the feasibility of the proposed mechanism and control algorithm. In addition, this paper also aims at giving a perspective in such area in the future.

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27

Guzmán, Amador M., Rodrigo A. Escobar, and Cristina H. Amon. "Flow Mixing Enhancement from Balloon Pulsations in an Intravenous Oxygenator." Journal of Biomechanical Engineering 127, no. 3 (2004): 400–415. http://dx.doi.org/10.1115/1.1894260.

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Computational investigations of flow mixing and oxygen transfer characteristics in an intravenous membrane oxygenator (IMO) are performed by direct numerical simulations of the conservation of mass, momentum, and species equations. Three-dimensional computational models are developed to investigate flow-mixing and oxygen-transfer characteristics for stationary and pulsating balloons, using the spectral element method. For a stationary balloon, the effect of the fiber placement within the fiber bundle and the number of fiber rings is investigated. In a pulsating balloon, the flow mixing charact

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28

Kühn, Florian, Jan Rehra, David May, Sebastian Schmeer, and Peter Mitschang. "Dry fiber placement of carbon/steel fiber hybrid preforms for multifunctional composites." Advanced Manufacturing: Polymer & Composites Science 5, no. 1 (2019): 37–49. http://dx.doi.org/10.1080/20550340.2019.1585027.

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29

Satwalekar, Parth, Tanushree Satwalekar, Vasanthi Bondugula, B. Bhuvaneshwari, KV Harshavardhan, and Kiran Pasula. "Creating Esthetic Harmony with Nonloading, Fixed Provisional Restoration using Extracted Teeth after Immediate Implant Placement." Journal of Contemporary Dental Practice 17, no. 4 (2016): 344–46. http://dx.doi.org/10.5005/jp-journals-10024-1852.

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ABSTRACT Aim To make use of fiber-reinforced composite and the patient's own extracted teeth in fabricating a provisional restoration following immediate implant placement. Background Fiber-reinforced composites offer various possibilities in temporization of osseointegrating implants in the esthetic zone. Technique In this chairside technique, the patient's own extracted teeth with fiber-reinforced composite were used to fabricate a provisional restoration after immediate implant placement. Conclusion A putty index was made before extracting the teeth and placing the implants as planned. The

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30

Fan, Congze, Zhongde Shan, Guisheng Zou, Li Zhan, and Dongdong Yan. "Performance of Short Fiber Interlayered Reinforcement Thermoplastic Resin in Additive Manufacturing." Materials 13, no. 12 (2020): 2868. http://dx.doi.org/10.3390/ma13122868.

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To further improve the mechanical properties of thermoplastic resin in additive manufacturing (AM), this paper presents a novel method to directly and quantitatively place the short fibers (SFs) between two printing process of resin layers. The printed composite parts with SFs between the layers was reinforced. The effects of single-layer fiber content, multi-layer fiber content and the length of fibers on the mechanical properties of printed specimens were studied. The distribution of fibers and quality of interlayer bonding were assessed using mechanical property testing and microstructure e

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31

Iwashita, Motoi, Chihaya Tanaka, and Noriyuki Ikeuchi. "Remote node placement in optical fiber access networks." Electronics and Communications in Japan (Part I: Communications) 78, no. 12 (1995): 10–25. http://dx.doi.org/10.1002/ecja.4410781202.

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32

Sharp, Richard, Scott Holmes, and Cindy Woodall. "Material Selection/Fabrication Issues for Thermoplastic Fiber Placement." Journal of Thermoplastic Composite Materials 8, no. 1 (1995): 2–14. http://dx.doi.org/10.1177/089270579500800102.

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33

Gao, Jiuchun, Anatol Pashkevich, and Stéphane Caro. "Optimal Trajectories Generation in Robotic Fiber Placement Systems." IOP Conference Series: Materials Science and Engineering 212 (June 2017): 012009. http://dx.doi.org/10.1088/1757-899x/212/1/012009.

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34

Belhaj, M., M. Deleglise, S. Comas-Cardona, et al. "Dry fiber automated placement of carbon fibrous preforms." Composites Part B: Engineering 50 (July 2013): 107–11. http://dx.doi.org/10.1016/j.compositesb.2013.01.014.

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35

He, Qin. "Design and Research of Multiple Fiber Tows Placement Control System." Applied Mechanics and Materials 719-720 (January 2015): 388–92. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.388.

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In view that present traditional composites forming technologies are difficult to guarantee the processing quality of complex components such as components with small curvature radius or with concave-convex surface. this paper used the fiber placement technology, and in order to achieve the single independent and overall joint movement control of each fiber tows ,it adopted the mainstream open control mode of a PC machine combined with a programmable multi-axis motion controller . At the same time, it introduced a feedback system to realize the accurate pressure control of multiple fiber tows,

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36

Cao, Zhongliang, Mingjun Dong, Kailei Liu, and Hongya Fu. "Temperature Field in the Heat Transfer Process of PEEK Thermoplastic Composite Fiber Placement." Materials 13, no. 19 (2020): 4417. http://dx.doi.org/10.3390/ma13194417.

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Under the effect of different process parameters, the temperature field inside the thermoplastic fiber is very complex and directly affects the fusion quality between the resins. Considering the heat transfer behavior of thermoplastic fiber polyether ether ketone (PEEK) as the research object, a mathematical model of heat transfer in the thermoplastic composite fiber placement with the relevant boundary conditions was established. Ansys Parametric Design Language (APDL) was used to generate the finite element model and simulate the transient process, not only to explore the influence of variou

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Wang, Xianfeng, Huaqiao Wang, and Jun Xiao. "Research on a fiber ring generating algorithm for manufacturing fiber composite rotating structures of complex geometry." Transactions of the Canadian Society for Mechanical Engineering 42, no. 3 (2018): 233–38. http://dx.doi.org/10.1139/tcsme-2017-0042.

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Due to its light weight and high strength, carbon fiber reinforcement resin based composite (CFRC) has been widely used in aerospace, military, and many other industries. As the manufacturing technology develops, the geometry of CFRC components has seen significant changes, such as closed surface from the traditional open surface, or quite sophisticated topologies from simple shapes. As a result, fabrication of CFRC is confronted with challenging issues related to the design of fiber placement trajectory for optimal performance. In this paper, a trajectory generating algorithm is proposed base

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Zhao, Pan, Yaoyao Shi, Chao Kang, et al. "Optimization of Process Parameters for Robotic Fibre Placement." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 36, no. 4 (2018): 693–700. http://dx.doi.org/10.1051/jnwpu/20183640693.

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Compared with labour-intensive and time-consuming processing of conventional fabrication methods, the robotic fiber placement process greatly improves the flexibility of the fiber placement process and allows for the construction of more complex structures. Based on the study of the placement process, the intimate contact process and healing process were analysed theoretically. The key process parameters for affecting the quality of the composite component were put forward:hot gas torch temperature, compaction force and laying velocity. In order to analyse the fabrication process for laying th

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Xun, Da Wei, Chang Jie Luo, Kai He, and Ru Xu Du. "Design and Analysis of 7-DOF Fiber Placement Machine." Advanced Materials Research 339 (September 2011): 271–75. http://dx.doi.org/10.4028/www.scientific.net/amr.339.271.

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This paper presents a 7-DOF (Degree Of Freedom) fiber placement machine. The fiber placement machine is designed through modular method and function analysis. The machine consists of three major parts: manipulator, spindle and creel cabinet, which has seven axes in total. The three rotating axes intersect in a vertex and three shifting axes of the manipulator are orthogonal. The style of wrist is orthogonal spherical wrist and it can achieve yawing, pitching and rolling motion. The placement head is mounted on the end of manipulator, including guide module, clamp module, restart module, cut mo

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May, David, Matthias Domm, and Peter Mitschang. "Wet Fiber Placement: A novel manufacturing technology for continuous fiber reinforced polymer composites." Journal of Composite Materials 53, no. 4 (2018): 521–33. http://dx.doi.org/10.1177/0021998318786998.

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The novel Wet Fiber Placement process enables in-line resin impregnation of fiber rovings and direct placement with defined length, position, and orientation. Therefore, the main challenge is the conveying of the impregnated roving, which is limp and provides little friction. For this, a special arrangement of rollers exploiting belt friction is used. In this study, a prototype system is presented and used to give a first impression on the potential of the approach. Therefore, a 24 k carbon fiber roving, saturated with oil, is conveyed at different speeds while varying the winding scheme, the

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HAYASHI, Toshiya, Kazutoshi TAMAI, Shinya HONDA, and Yoshihiro NARITA. "Vibration Characteristics of laminated composite with curvilinear fiber fabricated by tailored fiber placement." Proceedings of the Dynamics & Design Conference 2016 (2016): 157. http://dx.doi.org/10.1299/jsmedmc.2016.157.

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42

Li, Yanfen, Xiangdong Liu, Kai Lű, and Xiaodong Du. "Preparation of Fiber-Reinforced Shell by Airflow Placement Fiber Technology for Investment Casting." International Journal of Metalcasting 13, no. 4 (2019): 979–86. http://dx.doi.org/10.1007/s40962-019-00323-2.

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Moldenhauer, Herbert. "Beanspruchungsgerechte Faserplatzierung in Faser-Kunststoff-Verbunden/Stressoptimized Fiber Placement in Fiber-reinforced Composites." Konstruktion 69, no. 06 (2017): 68–74. http://dx.doi.org/10.37544/0720-5953-2017-06-68.

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Inhalt: Eine Faserplatzierung in Richtung der Hauptspannungen in Faser-Kunststoff-Verbunden (FKV) schöpft die überragenden longitudinalen Steifigkeits- und Festigkeitswerte der Fasern voll aus. Für diese Methodik hat sich die Bezeichnung CAIO (Computer aided internal Optimization) etabliert. Die zu lösende Aufgabe besteht in der Berechnung von Hauptspannungslinien aus Hauptspannungsrichtungen, allgemeiner ausgedrückt: in der Integration von Richtungsfeldern. In dieser Arbeit wird gezeigt, dass dies für ebene Strukturen sowie für 3D-Schalen über die Simulation orthotroper Wärmeleitung mit hoher

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He, Ruming, Weiwei Qu, and Yinglin Ke. "An improved path discretization method for automated fiber placement." Journal of Reinforced Plastics and Composites 39, no. 13-14 (2020): 545–59. http://dx.doi.org/10.1177/0731684420915986.

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In the automated fiber placement process, the continuous placement paths need to be discretized into a finite number of path points because the laying head cannot continuously trace the predetermined curved path. However, the discretization of the placement path, which is a spatial curve, will inevitably introduce error. In this paper, an improved path discretization algorithm is proposed for the fiber placement of complex double-curved structures. Firstly, the discrete error was decomposed into normal direction and binormal direction, and they are correlated with the laying process and their

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Ochoa-Ruiz, Gilberto, Romain Bevan, Florent de Lamotte, Jean-Philippe Diguet, and Cheng-Cong Bao. "Real-Time Control System for Improved Precision and Throughput in an Ultrafast Carbon Fiber Placement Robot Using a SoC FPGA Extended Processing Platform." International Journal of Reconfigurable Computing 2017 (2017): 1–20. http://dx.doi.org/10.1155/2017/3298734.

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We present an architecture for accelerating the processing and execution of control commands in an ultrafast fiber placement robot. The system consists of a robotic arm designed by Coriolis Composites whose purpose is to move along a surface, on which composite fibers are deposed, via an independently controlled head. In first system implementation, the control commands were sent via Profibus by a PLC, limiting the reaction time and thus the precision of the fiber placement and the maximum throughput. Therefore, a custom real-time solution was imperative in order to ameliorate the performance

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Brophy, Robert H., James E. Voos, Fintan J. Shannon, et al. "Changes in the Length of Virtual Anterior Cruciate Ligament Fibers during Stability Testing." American Journal of Sports Medicine 36, no. 11 (2008): 2196–203. http://dx.doi.org/10.1177/0363546508320764.

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Background Conventional tunnel positions for single-bundle (SB) transtibial anterior cruciate ligament (ACL) reconstruction are located in the posterolateral (PL) tibial footprint and the anteromedial (AM) femoral footprint, resulting in an anatomic mismatch graft that is more vertical than native fibers. This vertical mismatch position may significantly influence the ability of an ACL graft to stabilize the knee. Hypothesis Anatomic ACL fibers undergo a greater change in length during anterior translation and internal rotation than a conventional SB reconstruction from the PL tibial footprint

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Iuvshin, A. M., S. D. Tretyakov, Y. S. Andreev, and I. N. Gibadullin. "Thermoplastic Polymer Composites Production by Automated Fiber Placement Method." Key Engineering Materials 836 (March 2020): 78–83. http://dx.doi.org/10.4028/www.scientific.net/kem.836.78.

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This article deals with comparative analysis between thermoplastics and thermosets polymer materials. The problems of the choice of the polymer matrix and reinforcement filler in the manufacture products are made of polymer composite materials (PCM) for the oil industry are considered. Based on the analysis of existing types of polymer matrix and reinforcement fillers to maximize the requirements for PCM products for the oil and gas industry, a polyphenylene sulfide feed was proposed as a polymer matrix, and a unidirectional carbon fiber was used as a reinforcement filler. The results of labor

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Raman, Venkadesh, Monssef Drissi-Habti, Preshit Limje, and Aghiad Khadour. "Finer SHM-Coverage of Inter-Plies and Bondings in Smart Composite by Dual Sinusoidal Placed Distributed Optical Fiber Sensors." Sensors 19, no. 3 (2019): 742. http://dx.doi.org/10.3390/s19030742.

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Designing of new generation offshore wind turbine blades is a great challenge as size of blades are getting larger (typically larger than 100 m). Structural Health Monitoring (SHM), which uses embedded Fiber Optics Sensors (FOSs), is incorporated in critical stressed zones such as trailing edges and spar webs. When FOS are embedded within composites, a ‘penny shape’ region of resin concentration is formed around the section of FOS. The size of so-formed defects are depending on diameter of the FOS. Penny shape defects depend of FOS diameter. Consequently, care must be given to embed in composi

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Uhlig, Kai, Lars Bittrich, Axel Spickenheuer, and José Humberto S. Almeida. "Waviness and fiber volume content analysis in continuous carbon fiber reinforced plastics made by tailored fiber placement." Composite Structures 222 (August 2019): 110910. http://dx.doi.org/10.1016/j.compstruct.2019.110910.

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Xiao, Hong, Wei Han, Wenbin Tang, and Yugang Duan. "An Efficient and Adaptable Path Planning Algorithm for Automated Fiber Placement Based on Meshing and Multi Guidelines." Materials 13, no. 18 (2020): 4209. http://dx.doi.org/10.3390/ma13184209.

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Path planning algorithms for automated fiber placement are used to determine the directions of the fiber paths and the start and end positions on the mold surfaces. The quality of the fiber paths determines largely the efficiency and quality of the automated fiber placement process. The presented work investigated an efficient path planning algorithm based on surface meshing. In addition, an update method of the datum direction vector via a guide-line update strategy was proposed to make the path planning algorithm applicable for complex surfaces. Finally, accuracy analysis was performed on th

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