Optimal finite element modeling of filament wound CFRP tubes

Zacharakis, Ilias; Giagopoulos, Dimitrios; Αραϊλόπουλος, Αλέξανδρος; Markogiannaki, Olga

doi:10.1016/j.engstruct.2021.113808

Cited by 14 publications

(5 citation statements)

References 39 publications

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“…The current work has explored a new material design methodology based on a combination of a GMC micromechanical model and a state-of-the-art covariance matrix adaptation (CMA-ES) optimization algorithm [32,34,35]. The methodology was validated by comparing the predicted effective properties with the measured experimental data presented in the work of Hinton et al [33].…”

Section: Discussionmentioning

confidence: 99%

“…The algorithm efficiently tunes the properties of all individual composites' constituent properties along with their geometric arrangement in order to accurately predict the thermomechanical stress and deformation response of a previously experimentally tested composite material specimen [33]. CMA-ES has been successfully implemented [34,35], providing fast and efficient optimum results. During this procedure, a set of the selected parameters are tuned in an iterative process towards the minimization of the objective function.…”

Section: Coupling Gmc To Cma-es Optimization Strategymentioning

confidence: 99%

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Composite Material Elastic Effective Coefficients Optimization by Means of a Micromechanical Mechanical Model

2022

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The presented research work demonstrates an efficient methodology based on a micromechanical framework for the prediction of the effective elastic properties of strongly bonded long-fiber-reinforced materials (CFRP) used for the construction of tubular structures. Although numerous analytical and numerical micromechanical models have been developed to predict the mechanical response of CFRPs, either they cannot accurately predict complex mechanical responses due to limits on the input parameters or they are resource intensive. The generalized method of cells (GMC) is capable of assessing more detailed strain fields in the vicinity of fiber–matrix interfaces since it allows for a plethora of material and structural parameters to be defined while being computationally effective. The GMC homogenization approach is successfully combined with the covariance matrix adaptation evolution strategy (CMA–ES) to identify the effective elasticity tensor Cij of CFRP materials. The accuracy and efficiency of the proposed methodology are validated by comparing predicted effective properties with previously measured experimental data on CFRP cylindrical samples made of 3501-6 epoxy matrix reinforced with AS4 carbon fibers. The proposed and validated method can be successively used in both analyzing the mechanical responses of structures and designing new optimized composite materials.

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Section: Discussionmentioning

confidence: 99%

Section: Coupling Gmc To Cma-es Optimization Strategymentioning

confidence: 99%

Composite Material Elastic Effective Coefficients Optimization by Means of a Micromechanical Mechanical Model

2022

Self Cite

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“…The wide application of carbon fiber reinforced plastic (CFRP) in aerospace, shipbuilding, automobile manufacturing, military industry, and other fields promotes the rapid development of automated laying technologies 1–6 . Currently, automated manufacturing techniques for composite components predominantly encompass Filament Winding (FW), Automated Tape Laying (ATL), and Automated Fiber Placement (AFP) 7–9 . Among them, AFP enables independent control of multiple prepreg fibers, which is suitable for the placement of complex surfaces, and the material utilization rate is higher 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Modeling of contact mechanics and defects investigation in automated fiber placement

Miao,

Zhu,

Guo

et al. 2024

Polymer Composites

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The layup quality of prepreg fibers onto complex surfaces is the most concerned issue in automated fiber placement (AFP), which is intimately related to the contact stress in tractive rolling contact. An analytical model of tractive rolling contact is proposed in this paper to clarify the defects mechanism during the AFP process, which considers the mold curvatures, mechanical properties of contacted objects, and pose information to make it suitable for irregular surfaces and arbitrary conditions. Classical Hertz theory in this model is expanded to 3D contact area, and multi‐scale deformations are united in the accurate calculation of contact stress under geometric constraints. Based on the model, the phenomena of adhesion, microslip, and the transition between them in AFP are systematically analyzed. For engineering applications, a discrete processing strategy is proposed to quickly obtain the local curvatures of the mold. Additionally, an algorithm is designed to calculate the contact stress of any path. Experimental results on an aircraft component demonstrate the accuracy of the proposed model in restoring the contact stress distribution during AFP. In conjunction with specific layup information, this model exhibits utility in forecasting laying defects and parameter optimization.Highlights An analytical modeling approach based on Hertz theory is proposed to calculate the contact stress in automated fiber placement. A model‐based algorithm is designed and combined with the proposed discrete scheme to quickly restore the contact stress distribution. Contact states related to stress are systematically investigated and defects analysis based on computational mechanics results is illustrated.

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“…Sun et al [26] and Qi et al [27] studied the vibration feature of CFRP drive shafts and proposed a method of optimization in CFRP shaft. In general, the key researching emphasis of CFRP structure is to fully exert the advantage of fiber materials through ply arrangement and fiber reinforcement [27][28][29]. Few studies are focused on the application of large overhanging shaft in the poor rigidity machining tool system.…”

Section: Introductionmentioning

confidence: 99%

Vibration characteristics and machining performance of carbon fiber reinforced shaft in poor rigidity machining tool system

Ma,

Cai,

Yin

et al. 2024

Preprint

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Carbon fiber reinforced polymer (CFRP) materials have gained significant attention in the machining industry due to their exceptional strength-to-weight ratio and vibration characteristics. In the poor rigidity machining tool system, such as plunge milling, deep drilling and boring, the large overhanging shaft increases the requirement of chatter stability. In this study, a solution of carbon fiber reinforced shaft was proposed for the poor rigidity machining tool system. The vibration characteristic model was established by theoretical calculation, FE analysis and modal testing. The relationship between fiber arrangement and vibration characteristics was precisely described, and the optimization scheme of fiber reinforcement was proposed considering both the theoretical analysis and procedure technique. The machining performance of the optimal HSS-CFRP shaft was compared with that of the traditional HSS shaft in the same tool system. Main aspects that significantly affect the machining performance were thoroughly evaluated, including tool weight, energy consumption, dynamic characteristics and chatter stability. The effect of fiber reinforcement was fully discussed, which provided a reliable solution for the poor rigidity machining system and other potential applications with large overhanging shaft.

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Optimal finite element modeling of filament wound CFRP tubes

Cited by 14 publications

References 39 publications

Composite Material Elastic Effective Coefficients Optimization by Means of a Micromechanical Mechanical Model

Composite Material Elastic Effective Coefficients Optimization by Means of a Micromechanical Mechanical Model

Modeling of contact mechanics and defects investigation in automated fiber placement

Vibration characteristics and machining performance of carbon fiber reinforced shaft in poor rigidity machining tool system

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