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通用单胞模型常被应用于复合材料细观力学分析。但原始的通用单胞模型存在求解量大、计算效率低的问题。本文中对其改进,建立了以子胞界面细观应力为未知量的细化单胞模型。该模型可以充分考虑纤维、基体和界面相等细观组分,并实现单向板的宏-细观多尺度力学分析。通过将组分材料失效判据引入到模型中,再与经典层合理论相结合,提出了一种基于细化单胞模型的复合材料层合板强度预报方法,并给出了基于试验数据的强度谱定量评测方法。通过与世界失效分析习题的失效理论和试验数据进行对比,证明本文的预报方法具有很高的计算精度和广泛的普适性。
Common unit cell model is often used in composite micromechanics analysis. However, the original universal cell model has the problems of large solution quantity and low computational efficiency. In this paper, the improvement of its established sub-cell interface to the micro-stress of the unknown amount of refined cell model. The model can fully consider the mesostructures of fibers, matrix and interface, and realize the macroscopic-microscopic multi-scale mechanics analysis of the unidirectional plate. By introducing the criterion of component material failure into the model and combining with the classical laminar theory, a method for predicting the strength of composite laminates based on the refined cell model is proposed. The strength of the composite laminates based on the experimental data is also given. Spectrum quantitative evaluation method. Compared with the failure theory and experimental data of the world failure analysis exercises, this paper proves that the forecasting method in this paper has high calculation precision and wide universality.