为揭示三维编织复合材料船舶轴系在疲劳加载后剩余强度演化规律，在细观尺度下，基于渐进损伤方法，引入三维编织复合材料各组分疲劳失效、静拉伸失效的判定条件，考虑三维编织复合材料在疲劳加载过程中纤维束结构变化，建立一种三维编织复合材料疲劳加载后剩余强度预测模型。开展了三维编织复合材料平板试验件拉-拉疲劳后的拉伸试验，得到了循环数分别为25%、50%、75%后的剩余强度试验数据。预测模型的计算结果表明：剩余强度的预测值与试验值误差小于10%，相应循环数下试验件实际测量尺寸与计算尺寸误差小于5%，预测结果具有较高精度，说明了预测模型的有效性。
In order to reveal the evolution law of residual strength of 3D braided composites ship shafting after fatigue loading, the fatigue failure and static tensile failure conditions of each component of 3D braided composite were introduced based on the progressive damage method at the meso-scale, and the changes of fiber bundle structure of 3D braided composite during fatigue loading were considered. A prediction model of residual strength of 3D braided composites after fatigue loading was established. The tensile test of 3D braided composite was carried out after tensile fatigue, and the residual strength test data with cycles of 25%, 50% and 75% were obtained. The calculation results of the prediction model show that the error between the predicted value and the test value of the residual strength is less than 10%, and the error between the actual measured size and the calculated size of the test part is less than 5% under the corresponding number of cycles. The prediction results have a high precision, which shows the validity of the prediction model.
2023,45(23): 62-66 收稿日期：2022-12-07
DOI：10.3404/j.issn.1672-7649.2023.23.011
分类号：TB332
作者简介：马炳杰(1981-),男,博士,研究员,主要从事柴油机和动力装置低噪声与抗冲击技术研究
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