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首先通过单向拉伸试验测试和理论计算两种方法得到4层(45/45/45/45)铺设碳纤维复合材料的弹性模量,作为文中数值计算及弯矩分析的材料参数。通过4层(45/45/45/45)铺设碳纤维复合材料肋进行整体缠绕过程试验,得到肋整体缠绕过程肋表层应变和缠绕弯矩。利用ABAQUS分别建立了复合材料肋整体缠绕精细有限元模型,实现了缠绕一周过程强几何非线性数值模拟分析,得到各层应力、应变特征和缠绕弯矩,并与试验结果比较分析。进而给出缠绕弯矩解析表达式,并对材料铺设与厚度进行分析,得到缠绕过程最优材料铺设机理与最大厚度分析方法。该文对缠绕肋设计和深入研究具有重要参考价值。
First, the elastic modulus of four layers (45/45/45/45) laid carbon fiber composites was obtained by uniaxial tensile test and theoretical calculation as numerical parameters and material parameters of bending moment analysis. Through four layers (45/45/45/45) of laying carbon fiber composite ribs for the overall winding process of the test, to obtain the whole rib rib surface strain and winding bending moment. The ABAQUS finite element model of intertwined composite rib was established respectively, and the strong geometric and nonlinear numerical simulation of the process of winding was achieved. The stress, strain characteristics and winding moment of each layer were obtained and compared with the experimental results. Then the analytical expression of the winding moment is given, and the material laying and the thickness are analyzed. The optimum material laying mechanism and the maximum thickness analysis method are obtained. This article has important reference value for the design and further research of winding rib.