Stochastic optimization of graphite-flax/epoxy hybrid laminated composite for maximum fundamental frequency and minimum cost

Savran, Melih; Aydın, Levent

doi:10.1016/j.engstruct.2018.07.043

Cited by 37 publications

(22 citation statements)

References 48 publications

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“…Various studies are available in which the favourable properties of combining different materials or types of fibres have been investigated. For example, flax and carbon [ 30 , 31 , 32 , 33 , 34 ], flax and basalt [ 29 , 35 , 36 ], flax and graphite [ 37 ] flax and Kevlar [ 38 ] and flax and glass [ 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ] were hybridised. If glass as outer layers and a flax core are used in the hybrid material, water absorption can be significantly reduced compared to a pure flax composite [ 40 , 45 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Low-Twist Bast Fibre Yarns from Flax Tow for High-Performance Composite Applications

et al. 2020

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The use of natural fibres for components subjected to higher mechanical requirements tends to be limited by the high price of high-quality semi-finished products. Therefore, the present study deals with the development of more cost-effective staple fibre yarns made from flax tow. In the subsequent processing stage, the yarns were processed into quasi-unidirectional (UD) fabrics. The results of the fibre characterisation along the process chain have shown that no significant mechanical fibre damage occurs after slivers’ production. Fibres prepared from yarns and fabrics show comparable characteristics. The yarns were processed to composites by pultrusion to verify the reinforcement effect. The mechanical properties were comparable to those of composites made from a high-quality UD flax roving. The fabrics were industrially processed into composite laminates using a vacuum infusion and an autoclave injection process (vacuum injection method in an autoclave). While impact strength compared to a reference laminate based on the UD flax roving was achieved, tensile and flexural properties were not reached. An analysis showed that the staple fibre yarns in the fabric show an undulation, leading to a reorientation of the fibres and lower characteristic values, which show 86–92% of the laminate made from the flax roving. Hybrid laminates with outer glass and inner flax layers were manufactured for the intended development of a leaf spring for the bogie of a narrow-gauge railroad as a demonstrator. The hybrid composites display excellent mechanical properties and showed clear advantages over a pure glass fibre-reinforced composite in lightweight construction potential, particularly flexural stiffness.

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Section: Introductionmentioning

confidence: 99%

Novel Low-Twist Bast Fibre Yarns from Flax Tow for High-Performance Composite Applications

et al. 2020

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“…For the sub-problem I, the objective is to maximize the fundamental frequency of a 8-layer non-hybrid laminated composite with graphite/epoxy material. The results obtained by the PSO algorithm are listed in Table 2 and compared to those reported by Abachizadeh and Tahani 13 and Savran and Aydin 17 . In order to make the contents of the table more clear, it is worth mentioning that the stacking sequence includes the orientations of the layers, in which the subscription ( ) shows symmetry of laminated composite plate.…”

Section: Single-objective Optimization Of the Non-hybrid Graphite/epoxy Composite Platementioning

confidence: 96%

“…For more details on the calculation of̄ ( ) , the readers are referred to Ref. 17 . It is assumed that the laminated composite plate is simply supported.…”

Section: Free Vibration Analysismentioning

confidence: 99%

“…From Table 2 , it can be seen that the maximum fundamental frequencies obtained by this study are the same as reported by Refs. 13,17 . According to Table 2 , it can be inferred that the variations in the aspect ratios from 0.2 to 2 change the optimum fiber orientations from 0 • to 90 • .…”

Section: Single-objective Optimization Of the Non-hybrid Graphite/epoxy Composite Platementioning

confidence: 99%

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Investigating the effects of flax fibers application on multi-objective optimization of laminated composite plates for simultaneous cost minimization and frequency gap maximization

Hosseinzadeh

Jalili

Khani

2020

Journal of Building Engineering

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“…In the crossover phase, the present vector and mutant vector are operated together, and a trial vector is generated. After comparing the trial vector with the current population element, the best case is selected, and the operation continues [24].…”

Section: Modified Differential Evolution Algorithmmentioning

confidence: 99%

Stochastic optimization and modeling of high-velocity impact tests on high-temperature carbon–carbon composites

Aktaş

Aydın

2021

SN Appl. Sci.

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In this study, it is intended to optimize a high-velocity impact case of a composite plate. The case selected from literature focused on the failure response of advanced carbon–carbon (C/C) composites under high-velocity impacts. Based on the stochastic optimization method, three unique models are introduced within the present study's scope as dimensionless damage areas of front and back sides and the composite impact energy response. The difference between the equations found in the present study and the base study is the number of variables. Obtained prediction models consist of only the tests' input variables; thus, these models can be considered the essential prediction functions of high-velocity impact response of C/C composites under high temperatures. Multiple nonlinear regression method is used for objective functions of the optimization problem. Since the determination coefficient values have been found quite similar to the ones in the literature, the presented models can be considered successful in predicting the results. By utilizing the novel regression functions presented in this study, the damaged areas are minimized. Without the necessity of experimental research, further predictions can be made by operating the models found in the present study.

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Stochastic optimization of graphite-flax/epoxy hybrid laminated composite for maximum fundamental frequency and minimum cost

Cited by 37 publications

References 48 publications

Novel Low-Twist Bast Fibre Yarns from Flax Tow for High-Performance Composite Applications

Novel Low-Twist Bast Fibre Yarns from Flax Tow for High-Performance Composite Applications

Investigating the effects of flax fibers application on multi-objective optimization of laminated composite plates for simultaneous cost minimization and frequency gap maximization

Stochastic optimization and modeling of high-velocity impact tests on high-temperature carbon–carbon composites

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