Optimal design of fighter aircraft wing panels laminates under multi-load case environment by ply-drop and ply-migrations

Shrivastava, Sachin; Mohite, P.M.; Limaye, M.D.

doi:10.1016/j.compstruct.2018.09.004

Cited by 15 publications

(6 citation statements)

References 20 publications

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“…The laminate plate with ply drop-offs was designed with 16 stacked plies and discretized considering each line divided into 10 fragments, generating a total of 800 elements and 2,581 nodes in the entire structure. This type of element is used in many studies involving laminate composites with ply drop-offs (Nasab et al , 2018; Liu et al , 2018; Panettieri et al , 2019; Shrivastava et al , 2019) limited to an overall structural evaluation.…”

Section: Methodsmentioning

confidence: 99%

“…The design variables were a set of ply layouts, considering as constraints the deflection, maximum stress, natural frequencies and number of plies. Shrivastava et al (2019) used a GA and the finite element model for an optimization study of wing panels with ply drop-off. A multi-objective optimization using the Tsai-Wu failure index and lateral deflection was considered to achieve the optimal ply drop-off design that offers minimum weight.…”

Section: Optimum Design Of Composite Structuresmentioning

confidence: 99%

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Optimum design of composite structures with ply drop-offs using response surface methodology

Diniz

Mendéz

Almeida

et al. 2021

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Purpose Many studies only take into account the ply stacking sequence as the design variable to determine the optimal ply drop-off location; however, it is necessary to optimize other parameters that have a direct influence on the ply drop-off site such as which plies should be dropped and in which longitudinal direction. That way, the purpose of this study is to find the most significant design variables relative to the drop-off location considering the transversal and longitudinal positions, seeking to achieve the optimal combination of ply drop-off locations that provides excellent performance for the laminate plate. Design/methodology/approach This study aims to determine the optimal drop-off location in a laminate plate using the finite element method and an approach statistical with design of experiments (DOE). Findings The optimization strategy using DOE revealed to be satisfactory for analyzing laminate structures with ply drop-offs, demonstrating that not all design factors influence the response variability. The failure criterion response variable revealed a poor fit, with an adjusted coefficient of determination lower than 60%, thus demonstrating that the response did not vary with the ply drop-off location. Already the strain and natural frequency response variables presented high significance. Finally, the optimization strategy revealed that the optimal drop-off location that minimizes the strain and maximizes the natural frequency is the ply drop-off located of the end plate. Originality/value It was also noted that many researchers prefer evolutionary algorithms for optimizing composite structures with ply drop-offs, being scarce to the literature studies involving optimization strategies using response surface methodology. In addition, many studies only take into account the ply stacking sequence as the design variable to determine the optimal ply drop-off location; however, in this study, the authors investigated other important parameters that have direct influence on the ply drop-off site such as which plies should be dropped and in which longitudinal direction.

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Section: Methodsmentioning

confidence: 99%

Section: Optimum Design Of Composite Structuresmentioning

confidence: 99%

Optimum design of composite structures with ply drop-offs using response surface methodology

Diniz

Mendéz

Almeida

et al. 2021

View full text Add to dashboard Cite

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“…Several guide-based methods have been developed and widely used for blending optimization [5,6,14,37,49,50]. The blending procedure in this method is proposed based on the concept of the PDS method [14].…”

Section: Guide-based Adaptive Gamentioning

confidence: 99%

A novel parallel method for layup optimization of composite structures with ply drop-offs

Liu

Featherston

Kennedy

2023

Composite Structures

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“…Manufacturing constraints serve to reduce the risk of local failure associated with out-of-plane stresses [16][17][18] ; blending requirements serve to ensure shared layers between adjacent partitions to reduce the risk of in-plane delamination caused by ply-drops. [19][20][21][22] These two design criteria are usually implemented by limiting the ply-drop relationship between adjacent partitions or changing the chromosome codes in sequence optimization. These strategies are obviously not applicable to the collaborative design of body panels, which would otherwise obtain essentially the same layup schemes for all components.…”

Section: Introductionmentioning

confidence: 99%

Variable-stiffness optimization of CFRP body panels for body-in-white

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part D:

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Body panels have a direct influence on the static and dynamic stiffness of the body-in-white. With the introduction of CFRP in automotive body, these panels have ushered in the potential of being designed with variable-stiffness. However, due to the inherent complexity of variable-stiffness design and the need to integrate all panels to account for their interaction on BIW, the related design issue has not been solved. This paper reports a design method to achieve the successive optimization of the thickness distribution and stacking sequence for body panels, as well as ensure basic manufacturing and blending requirements of design results. This method was applied to the virtual design of the roof, floor, outer and inner side panels of a body-in-white. Compared with original constant-stiffness CFRP components, a 16.4% weight reduction was attained, the torsional and bending stiffness, first-order torsional and bending frequencies were enhanced by 5.0%, 10.9%, 4.7%, and 7%, respectively.

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Optimal design of fighter aircraft wing panels laminates under multi-load case environment by ply-drop and ply-migrations

Cited by 15 publications

References 20 publications

Optimum design of composite structures with ply drop-offs using response surface methodology

Optimum design of composite structures with ply drop-offs using response surface methodology

A novel parallel method for layup optimization of composite structures with ply drop-offs

Variable-stiffness optimization of CFRP body panels for body-in-white

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