Failure prediction of composite sandwich L-joint under bending

Zeng, Haiyan; Yan, Rong; Xu, Lin

doi:10.1016/j.compstruct.2018.05.022

Cited by 36 publications

(7 citation statements)

References 25 publications

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“…Combined with the progressive failure analysis criterion, it is necessary to match the corresponding stiffness reduction model to comprehensively analyze the whole progressive failure process. Zeng et al 26 assumed that the corresponding material parameters will degrade to 0.001 when any failure mode occurs in the element. Qin et al 27 assumed that when fiber tensile failure and matrix failure occur, the corresponding coefficient of the material degenerates to 0.4917, and when other failure modes occur, the material parameters degenerate to 0.001.…”

Section: Progressive Failure Methods and Verificationmentioning

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: Progressive Failure Methods and Verificationmentioning

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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“…Li et al [4] analyzed the performance of a new type of L-joint and optimized the design to enhance its bending stiffness by nearly 40%. Zeng et al [5] studied an L-joint structure similar to the one in this paper. They performed progressive failure simulations of the tensile and compressive ultimate conditions using a modified Hashin criterion combined with an instant stiffness degradation strategy.…”

Section: Introductionmentioning

confidence: 94%

“…Shen Wei [6] investigated the same structure as Zeng Haiyan, but focused on the fatigue performance and developed a fatigue life calculation model based on the test results. Most of these studies [2,4,5] concentrated more on ultimate loads, while their simulation results did not match well with the damage 2 of 20 process and structural response. It is mainly due to the unique geometry of the L-joint that any influence from the damage at the transitional corner is amplified at the two ends of the joint.…”

Section: Introductionmentioning

confidence: 99%

Compressive Damage and Failure Behavior of Plain-Woven GFRP Sandwich Composite L-Joints of Ships: Experiment and Simulation

Qin

Yan

Shen

et al. 2023

JMSE

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This paper studies the compressive failure behavior of pw-GFRP (plain-woven glass fiber reinforced polymer) sandwich composite L-joints for ships. Six L-joint specimens were subjected to ultimate compressive tests, which show that damage and stiffness degradation started much earlier than any visible signs. A modified fiber kinking criterion is developed for the compressive failure of pw-GFRP layup structure. Moreover, a hybrid stiffness degradation model is applied to simulate the damage progression. The criterion and the degradation model are implemented in simulation through Abaqus user coding. The simulation results are compared with other existing theories, and the proposed criterion is validated by the similar damage initiation time. The combination of the proposed criterion and hybrid degradation model demonstrates a clear advantage over conventional methods in predicting the compressive damage evolution and ultimate failure behavior of the L-joint structure.

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“…The main cohesive interface parameters (initial stiffness K, interface strength t 0 , and fracture energy G C ) used in this numerical simulation were taken from the most similar material application in the literature [31][32][33] and listed in Table 3.…”

Section: Mechanical Properties Of Materialsmentioning

confidence: 99%

Parameterization of core plug replacement properties for flexural performance optimization of repaired composite honeycomb sandwich panel

Djemaoune

Krstic

2022

Journal of Composite Materials

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As lightweight structures, composite sandwich panels are distinguished by their significant flexural performances, which make them suitable for lightweight design applications, especially in the aerospace industry. These structures are very prone to different damages, which affects the structure’s performance. In this study, the numerical three-point bending test is carried out to evaluate the flexural performance of the damaged and repaired panel by comparing it with the intact panel values. The response surface methodology (RSM) is then adopted to analyze the core plug replacement properties’ effect on the flexural performances of the repaired honeycomb sandwich panel. Adequate models between the core plug replacement design parameters and the repaired panel flexural responses are built and discussed. In addition, aiming to determine the optimized core plug replacement parameters of the proposed repaired panel flexural performances, an optimization technique is implemented.

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Failure prediction of composite sandwich L-joint under bending

Cited by 36 publications

References 25 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

Compressive Damage and Failure Behavior of Plain-Woven GFRP Sandwich Composite L-Joints of Ships: Experiment and Simulation

Parameterization of core plug replacement properties for flexural performance optimization of repaired composite honeycomb sandwich panel

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