Analysis of porosity and mechanical behavior of composite T-joints produced by random vibration-assisted vacuum processing

Yang, Xiaobo; Zhan, Lihua; Zhao, Xing; Jiang, Chengbiao

doi:10.1007/s13726-020-00836-2

Cited by 11 publications

(2 citation statements)

References 49 publications

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“…The tensile pull-off test was adopted to test the overall mechanical properties of the structure, as shown in Figure 5(b). 17 An optical digital microscope (ODM, model: OLYMPUS DS×500, Japan) was used to observe the hot pressing quality of C-shaped parts, and a scanning electron microscope (SEM, model: TESCANMIRA3 LMU) was used to observe the interlamellar shear failure microstructure of the remelting interface under various process conditions.…”

Section: Experiments and Testingmentioning

confidence: 99%

Effect of forming process on mechanical and interfacial properties for thermoplastic composite I-stiffened structures

Dai

Zhan

Guan

et al. 2021

High Performance Polymers

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The forming process is the core factor to control the quality of thermoplastic composite components. In this paper, the common I-stiffened structures in the aerospace field were taken as the research object, and the forming process scheme was designed. Based on the prefabrication of C-shaped parts, the I-stiffened structures were prepared by the compression molding process. The influence law of molding temperature on the quality of the prefabricated C-shaped parts was explored. The time dependence of the PEEK melt viscosity was tested to provide the basis for the optimization of forming process parameters of I-stiffened structures. The influencing mechanism of thermoplastic composites repeatedly forming to the bonding strength of remelting interface was studied. The results show that repeated forming would lead to polymer aging and result in low bonding strength at the remelting interface of the I-stiffened structures. Optimizing the forming process could effectively reduce the aging of materials and improve the bonding strength of the remelting interface and overall mechanical properties of components. The research provides technical guidance for the manufacturing of complex thermoplastic composite components, especially the influence mechanism of the forming process on the bonding strength of remelting interface.

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Section: Experiments and Testingmentioning

confidence: 99%

Effect of forming process on mechanical and interfacial properties for thermoplastic composite I-stiffened structures

Dai

Zhan

Guan

et al. 2021

High Performance Polymers

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“…The prevailing methods employed for debonding assessments in stiffened panel primarily rely on the contact energy generated within the debonding region or the nonlinearity observed in the received signal [6,[13][14][15]. However, as most stiffened panels are made up of T-stiffener, U-stiffener, or J-stiffener, the varying flexural rigidity across debonding interfaces disrupts the correlation between the extent of debonding and the resulting nonlinearity [18]. The flexural rigidity of stiffener varies along the width also.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of nonlinear interaction of the guided wave due to breathing type debonding in stiffened panel

Kumar,

Banerjee,

Guha

2024

Eng. Res. Express

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The common tool for assessment of breathing-type debonding in metallic or composite structures is nonlinear guided wave-based technique. The past studies show that with debonding size, the strength of the nonlinearity does not exhibit strictly increasing or decreasing trends, or that the monocity is valid up to a certain size limit of debonding. This paper presents the study of non-linear interaction of guided waves in the debonding interface of a metallic stiffened panel. The study attempts to establish a relationship between the contact energy generated by the contact acoustic nonlinearity (CAN) at the debonding interface and the associated nonlinearity strength for various debonding sizes at various excitation frequencies. A numerical model of the stiffened panels is developed in three-dimensional finite element (FE) and validated with experiments for the study of interaction of nonlinear guided waves. The validated FE model is used to conduct studies on nonlinear interactions in debonding. The outcome of this study contributes to a better understanding of how guided waves can be used to effectively assess the debonding in metallic stiffened panels by considering non-linear interactions at the debonding interface. The study also provides insights into a more accurate and consistent quantification of the debonding using higher harmonic signals and contact energy produced by non-linear interactions.

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Tensile strength and failure behavior of T-stiffened panels with embedded delamination: experimental investigation

Wang

Xie

2021

Iran Polym J

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Analysis of porosity and mechanical behavior of composite T-joints produced by random vibration-assisted vacuum processing

Cited by 11 publications

References 49 publications

Effect of forming process on mechanical and interfacial properties for thermoplastic composite I-stiffened structures

Effect of forming process on mechanical and interfacial properties for thermoplastic composite I-stiffened structures

Numerical study of nonlinear interaction of the guided wave due to breathing type debonding in stiffened panel

Tensile strength and failure behavior of T-stiffened panels with embedded delamination: experimental investigation

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