Influence of mosaic pattern on hygrothermally-aged filament wound composite cylinders under axial compression

Azevedo, Cristiano Baierle de; Almeida, José Humberto S.; Flores, Heitor Feitosa; Eggers, Frederico; Amico, Sandro Campos

doi:10.1177/0021998319899144

Cited by 29 publications

(15 citation statements)

References 21 publications

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Section: Introductionmentioning

confidence: 99%

“…There are many concerns in the manufacturing process of the high-quality composite frames that have been investigated in the past years [ 35 , 36 , 37 , 38 , 39 , 40 ]. The effect of winding patterns in filament winding of composite cylinder was studied by Azevedo et al [ 37 ]. The number/sequence of fiber layers wound at specific angles on the composite frame are intended in the design step, in which the robot winding angle for each fiber layer is specified to ensure such arrangement in uniform, consistent, and homogeneous form (due to the anticipated stress of the composite) throughout the frame [ 1 , 21 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of High-Quality Straight-Line Polymer Composite Frame with Different Radius Parts Using Fiber Winding Process

et al. 2021

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The extraordinary features of fibrous composites enable advanced industries to design composite structures with superior performance compared to traditional structures. Composite frame structures have been designed frequently as components of mechanical systems to resist lateral and gravity loads. The manufacturing of high-quality composite frames depends primarily on the accurate fiber winding on frames with different pro-files and curved shapes. The optimal fiber winding process on a nonbearing composite frame with a circular cross-section is described in previous works by the same authors. As an extension to that, this study focuses on the manufacturing of straight-line composite frames with different profile radii at multiple locations. Such production procedure allows continuous winding of fibers gradually on individual parts of the frame and generally with different angles of fiber winding. The winding procedure is performed using fiber-processing head and industrial robot. The procedure for calculating the distance of the winding plane of fibers on the frame from the guide-line of the fiber-processing head is targeted. This distance depends on the required angle of fiber winding, the radius of the frame, and the geometric parameters of the fiber-processing head. The coordination of the speed of winding the fibers on the frame and the speed of the passage of the frame through the winding head is also considered. Determining the correct distance of winding the fibers from the corresponding guide-line of fiber-processing head and right coordination of the winding speed and the speed of passage of the frame through the fiber-processing head ensure compliance of the required angles of fiber windings on the frame and homogeneity of winding fibers, which are the two of the most important prerequisites for producing a quality composite frame. The derived theory is well verified on a practical experimental example.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of High-Quality Straight-Line Polymer Composite Frame with Different Radius Parts Using Fiber Winding Process

et al. 2021

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“…In addition to these identified issues, it is well-established that filament winding (FW) [28] is the most suitable and fastest manufacturing method to produce composite cylinders. Moreover, after the very first report in the literature on variable-angle filament-wound (VAFW) cylinders carried out by Wang et al [21], on reliability-based design and optimization, it becomes evident that real geometric imperfections and their effects on the mechanical performance of filament-wound shells is yet unknown and unexplored.…”

Section: Introductionmentioning

confidence: 99%

Measuring geometric imperfections of variable-angle filament-wound cylinders with a simple digital image correlation setup

Castro¹,

Almeida²,

St-Pierre³

et al. 2021

Preprint

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The experimental measurement of geometric imperfections of cylindrical shells is a fundamental step towards achieving representative models that are capable of capturing the imperfection-sensitive behavior of this type of shells and generate predictions that are comparable with experimental tests. The present study proposes an imperfection measurement method that is simple and applicable to both small and large structures, whereby the topographic data measured with one pair of cameras is obtained at six circumferential positions. Practical aspects of using digital image correlation are discussed, such as lighting and focus adjustments, and calibration. State-of-the-art best-fit routines are used to transform the obtained raw imperfection data onto a common coordinate system by means of least-squares optimization steps. Finally, the transformed data is stitched to build the full imperfection patterns that can be readily used in nonlinear finite element analyses. The developed method is demonstrated in the present study by measuring 12 variable-angle filament-wound cylinders, a novel class of variable-stiffness structures developed by our research group that combines a wide tailoring capability coming from the variable stiffness with the efficient manufacturability enabled by the filament winding process.

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“…Sofi et al presented dry fiber winding possibilities and explanation of the most important processes of winding [22], and Polini et al pointed out that the tension of winding during robotic filament winding technology is a very important parameter that influences directly the defects and the mechanical property of composite [23]. Azevedo et al investigated the effects of mosaic winding pattern on carbon-fiber composite cylinder fabricated using filament winding, and found the optimum radius to thickness ratio for optimum strength and stiffness properties [24]. Many authors studied the problem of the correct winding of fibers on a non-bearing core frame.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High-Quality Polymer Composite Frame by a New Method of Fiber Winding Process

et al. 2020

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Polymer composite frame has been frequently used in the main structural body of vehicles in aerospace, automotive, etc., applications. Manufacturing of complex curved composite frame suffer from the lack of accurate and optimum method of winding process that lead to preparation of uniform fiber arrangement in critical location of the curved frame. This article deals with the fabrication of high-quality polymer composite frame through an optimal winding of textile fibers onto a non-bearing core frame using a fiber-processing head and an industrial robot. The number of winding layers of fibers and their winding angles are determined based on the operational load on the composite structure. Ensuring the correct winding angles and thus also the homogeneity of fibers in each winding layer can be achieved by using an industrial robot and by definition of its suitable off-line trajectory for the production cycle. Determination of an optimal off-line trajectory of the end-effector of a robot (robot-end-effector (REE)) is important especially in the case of complicated 3D shaped frames. The authors developed their own calculation procedure to determine the optimal REE trajectory in the composite manufacturing process. A mathematical model of the winding process, matrix calculus (particularly matrices of rotations and translations) and an optimization differential evolution algorithm are used during calculation of the optimal REE trajectory. Polymer composites with greater resistance to failure damage (especially against physical destruction) can be produced using the above mentioned procedure. The procedure was successfully tested in an experimental composite laboratory. Two practical examples of optimal trajectory calculation are included in the article. The described optimization algorithm of REE trajectory is completely independent of the industrial robot type and robot software tools used and can also be used in other composite manufacturing technologies.

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Influence of mosaic pattern on hygrothermally-aged filament wound composite cylinders under axial compression

Cited by 29 publications

References 21 publications

Fabrication of High-Quality Straight-Line Polymer Composite Frame with Different Radius Parts Using Fiber Winding Process

Fabrication of High-Quality Straight-Line Polymer Composite Frame with Different Radius Parts Using Fiber Winding Process

Measuring geometric imperfections of variable-angle filament-wound cylinders with a simple digital image correlation setup

Fabrication of High-Quality Polymer Composite Frame by a New Method of Fiber Winding Process

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