Irregular Winding of Pre-preg Fibres Aimed at the Local Improvement of Flexural Properties

Kulhavý, Petr; Martina, Stefano; Srb, Pavel; Petrů, Michal; Samkova, Alzbeta

doi:10.14502/tekstilec2017.60.310-316

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…The sizes of angles ϕ (i) and ω (i) are randomly chosen and are within the limits set. Analogously vector h2 (i) BCS is constructed in relation (5).…”

Section: Robot Trajectory Optimizationmentioning

confidence: 99%

“…The detailed calculation procedure of finding transform matrix T(i) is described in [21,42]. and h2(i) opt BCS are defined by angles ϕ(i) opt , ω(i) opt and by relation (5).…”

Section: Robot Trajectory Optimizationmentioning

confidence: 99%

“…and h2(i) opt BCS are defined by angles ϕ(i) opt , ω(i) opt and by relation (5). As result of a calculation of…”

Section: Notementioning

confidence: 99%

“…[1,2]. Polymer composite frames are mainly used to reinforce the chassis, body, and doors of a car, or to strengthen the fuselage and attach windows to the fuselage, etc., in the aerospace and automotive industries, as well as in the manufacture of agricultural machinery [3][4][5][6]. These composite frames are primarily used due to their excellent mechanical and physical properties such as resistance to harsh weather conditions, as well as long term resistance to corrosion in severe environmental conditions, the wound fibers (usually carbon, aramid, or glass fibers) and the fabrication process [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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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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“…The sizes of angles ϕ (i) and ω (i) are randomly chosen and are within the limits set. Analogously vector h2 (i) BCS is constructed in relation (5).…”

Section: Robot Trajectory Optimizationmentioning

confidence: 99%

“…The detailed calculation procedure of finding transform matrix T(i) is described in [21,42]. and h2(i) opt BCS are defined by angles ϕ(i) opt , ω(i) opt and by relation (5).…”

Section: Robot Trajectory Optimizationmentioning

confidence: 99%

“…and h2(i) opt BCS are defined by angles ϕ(i) opt , ω(i) opt and by relation (5). As result of a calculation of…”

Section: Notementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2020

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“…The three-point bending test (Fig. 2b) was used to determine the flexural stiffness and flexural modulus [11]. The test was carried out according to ČSN EN ISO 14125.…”

Section: Mechanical Testsmentioning

confidence: 99%

Study of Mechanical Properties and Modeling of Flax Reinforced Composites

Srb

Martina

Kulhavý

et al. 2018

MSF

Self Cite

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This article deals with assessment of mechanical properties and possible technical usability of flax prepreg composite materials. Mechanical properties of materials are the decisive factor for selection of their suitable industrial application. The main step was to describe the process of acquiring basic mechanical properties of one layer. Then, these properties were used for creation of a numerical model of a primary laminate and subsequently for modeling a multilayered composite. The performed FEM model has been verified based on the experimentally tested samples in tensile and flexural loading.

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Principles of Winding Elbows from Pre-impregnated Carbon Fibers

Kulhavý

Pfliegel

2019

Current Methods of Construction Design

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Irregular Winding of Pre-preg Fibres Aimed at the Local Improvement of Flexural Properties

Cited by 4 publications

References 13 publications

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

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

Study of Mechanical Properties and Modeling of Flax Reinforced Composites

Principles of Winding Elbows from Pre-impregnated Carbon Fibers

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