Cure-induced strain and failure in deltoid of composite T-joints

Hisada, Shinsaku; Minakuchi, Shu; Takeda, Nobuo

doi:10.1016/j.compositesa.2020.106210

Cited by 16 publications

(3 citation statements)

References 37 publications

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“…Cui et al 8 established a finite element model of adhesive bonded composite T-joints under tensile load to predict random cracks in the filling area. In order to further reveal the failure mechanism of T-joints, Shinsaku et al 9 established a finite element model for the failure simulation of T-joints, and found that the normal stress at the corner of the transition area has a significant impact on the occurrence of structural failure. Fatih et al 10 put forward an improved progressive failure analysis method for corrugated composite laminates and transition joints, and the numerical results are in good agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Ultimate bearing capacity analysis and bio-inspired optimization design of marine composite T-joint

Shen,

Wang,

Yang

et al. 2023

Journal of Composite Materials

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Sandwich composites are widely used in aviation, aerospace and marine engineering fields because of their excellent comprehensive properties. However, it is difficult to accurately predict the ultimate performance of sandwich composite structures because of their complex failure modes and uncoordinated damage processes. In this paper, the ultimate load, progressive failure process and failure mode of sandwich composite T-joints under three-point bending and lateral bending loads are predicted and verified by using an improved progressive damage analysis program. Moreover, the bio-inspired optimization of the composite T-joint is carried out, and the corner shape and material combination of the T-joint are designed and optimized based on the contour of the flange bone of the bird. The main factors affecting the bearing capacity of T-joint are further discussed, and a reasonable and feasible bio-inspired optimization scheme is obtained, which provides some reference for the design of marine composite T-joint.

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Section: Introductionmentioning

confidence: 99%

Ultimate bearing capacity analysis and bio-inspired optimization design of marine composite T-joint

Shen,

Wang,

Yang

et al. 2023

Journal of Composite Materials

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“…Compared with the original structure, the initial bending load of failure of the optimal structure was increased by 40%, and the elastic strain energy was increased by 75%. Hisada et al [24] examined the relationship between the strain distribution and the failure pattern of the deltoid in T-joint. Three types of deltoid structures were used.…”

Section: Introductionmentioning

confidence: 99%

Failure Mechanism and Strength Prediction Model of T-Joint of Composite Sandwich Structure

Liu

et al. 2021

Metals

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Composite sandwich structures are widely used in many fields. T-joint plays a significant role in the composite sandwich structural connection. In this paper, a type of adhesive T-joint was manufactured and tested under bending and shearing load. According to the experiment, the finite element model was established to reveal the failure process. A strength prediction model was proposed based on the simulation. The results showed that the T-joint’s lower connector and the web’s lower face panel controlled its maximum load-bearing capacity, and the failure mode is the fiber compressive damage. The predicted ultimate bearing capacity of the T-joint showed a good agreement with the simulation, and the maximum relative error was less than 3%.

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“… 6 , 7 . Compared with the J-type structure, which has a complex configuration and can only transmit special loads, T-stiffened panels with manufacturing process advantages are more widely used in canards, wings, fuselages, and other parts of aircrafts 8 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of the out-of-plane load-bearing capacity of T1100/5405 composite T-stiffened panels

Huang

Zhang

Dong

et al. 2021

Sci Rep

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With the continuous improvement of the mechanical properties of composite materials, the adhesive interface performance of composite T-stiffened panels has become a critical factor in determining the overall structural strength. However, little work has been reported on the mechanical properties of adhesive interfaces in composite T-stiffened panels under lateral bending and shear loading. Especially, there is no clear explanation on the damage evolution law of structural properties for the interface with defects, which greatly influenced the use of T-stiffened composite structures. In this paper, the mechanical properties of T1100/5405 composite T-stiffened laminates under lateral bending and shear loading are experimentally and numerically investigated. The load-bearing capacities for the panels with intact and defected adhesive interfaces are compared, the damage evolution law of typical T-stiffened structures is further explored. Based on the continuum damage model (CDM) and the cohesive zone model (CZM), the constitutive models of the adhesive layer and the composite material are established respectively. Good agreements between experimental and numerical profiles illustrate that damages mainly occur on the loading side and the corner of the L-type ribs under lateral bending conditions, while damages extend from both sides of the interface layer to the center under shear loading. When a prefabricated defect exists, damages extend from the defect location along the loading direction. At the same time, the analysis shows that the lay-up of the surface layer, the chamfer radius, and the width of T-type ribs have a great influence on the structural load-bearing capacity, but less on the damage evolution form.

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Cure-induced strain and failure in deltoid of composite T-joints

Cited by 16 publications

References 37 publications

Ultimate bearing capacity analysis and bio-inspired optimization design of marine composite T-joint

Ultimate bearing capacity analysis and bio-inspired optimization design of marine composite T-joint

Failure Mechanism and Strength Prediction Model of T-Joint of Composite Sandwich Structure

Investigation of the out-of-plane load-bearing capacity of T1100/5405 composite T-stiffened panels

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