Experiment and analysis of composite reinforced panel’s limit load capacity under axial compression

Zhang, Xiu-Lu; Cai, Bing; Miao, Huihui; Li, Changyou; Huang, Wenchao; Fang, Caiwen

doi:10.1016/j.tws.2023.110729

Cited by 6 publications

(1 citation statement)

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“…Increasing demands on the strength, stability and aerodynamic precision of many thin-walled aircraft structures made from polymer composite materials [ 1 , 2 , 3 ] have prompted a large amount of research into design methods [ 4 , 5 , 6 , 7 , 8 , 9 ] and technologies [ 10 , 11 , 12 , 13 ] capable of meeting these requirements at satisfactory performance and cost. An analysis of the results of these studies shows that in practice, meeting these often conflicting requirements with restrictions on mass, properties of available components and technologies is a rather complex task that can be solved by making expert decisions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Thin-Walled Polymer Composite Part Quality When Manufactured Using Vacuum Infusion with Various External Pressure Controls

Shevtsov,

Chang,

Zhilyaev

et al. 2024

Polymers

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The article presents the results of modeling various modes of vacuum infusion molding of thin-walled polymer-composite structures of arbitrary geometry. The small thickness of the manufactured structures and the fixation of their back surface on the rigid surface of the mold made it possible to significantly simplify the process model, which takes into account the propagation of a thermosetting resin with changing rheology in a compressible porous preform of complex 3D geometry, as well as changes in boundary conditions at the injection and vacuum ports during the post-infusion molding stage. In the four modes of vacuum-infusion molding studied at the post-infusion stage, the start time, duration and magnitude of additional pressure on the open surface of the preform and in its vacuum port, as well as the state of the injection gates, were controlled (open–closed). The target parameters of the processes were the magnitude and uniformity of the distribution of the fiber volume fraction, wall thickness, filling of the preform with resin and the duration of the process. A comparative analysis of the results obtained made it possible to identify the most promising process modes and determine ways to eliminate undesirable situations that worsen the quality of manufactured composite structures. The abilities of the developed simulation tool, demonstrated by its application to the molding process of a thin-walled aircraft structure, allow one to reasonably select a process control strategy to obtain the best achievable quality objectives.

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