考虑温度效应的干纤维预制体压缩蠕变模型

doi:10.7527/S1000-6893.2023.28513

Abstract

Abstract: Abstract: The description of the fiber fabric preform's creep/recovery behavior is crucial for modeling the production of composite materials. The creep/recovery experiment of the CF3031 dry fiber preform was carried out, the experimental results were calculated and analyzed, and the material constitutive model was established in order to analyze and predict the thick deformation behavior of the CF3031 dry fiber preform in the preforming process. To evaluate and analyze the creep component and overall fitting impact of several creep calculation models on the creep/recovery test data of the CF3031 dry fiber preform, the least square method principle and the superposition principle are first utilized. The findings demonstrate that Burgers' model is superior than other models.Then, a single equation material model suited for various creep stresses and preform temperatures is presented to describe the time-dependent thick creep/recovery behavior of dry fiber fabric preforms on the foundation of the conventional Burgers model. The least squares approach and analysis of experimental data were used to derive the model coefficients. The findings reveal that the experimental and model prediction curves are essentially consistent, demonstrating the efficiency of the procedure. Finally, the experimental outcomes of the new design are predicted using the constitutive model developed in this research. The findings demonstrate the usefulness of this approach by demonstrating that the experimental curve is essentially compatible with the model prediction curve.

Key words: Keywords: dry fiber preform, creep, creep/recovery, constitutive model, mechanical testing, Burgers model

CLC Number:

V261.97

References

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Compression creep model of dry fiber preform considering temperature effect

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