论文标题
部分可观测时空混沌系统的无模型预测
Progressive failure simulation of composite materials using the anisotropic phase field method
论文作者
论文摘要
各向异性相位场模型的有效计算框架用于探索界面性能，有效的关键能量释放速率和孔形状对纤维增强复合材料故障过程的影响。在此框架中，在有限元方法的背景下求解了相位方法，并研究了强和弱界面对复合材料的故障强度的影响。结果表明，当材料发生故障时，强界面显示脆弱，弱界面显示韧性，这可以提高材料的故障强度。同时，计算中引入了有效的临界能量释放速率，从而降低了材料的断裂韧性，这使得预测结果与实验结果更加一致，并提高了结果的准确性。还探索了孔形状对复合材料故障的影响，并捕获了不同孔形状的裂纹传播，这表明，带有孔的板的轴承能力不仅与孔的形状有关，而且与孔浓缩应力的位置以及孔的位置的位置相关，孔的位置载有负载。可以通过更改孔的形状来提高材料的轴承能力。这些结果揭示了不同因素对复合材料失败的影响，并为复合材料的有效设计奠定了基础。
An effective computational framework of an anisotropic phase field model is used to explore the effects of interface properties, effective critical energy release rates and hole shapes on the failure process of fibre-reinforced composites in this paper. In this framework, the phase field method is solved under the background of the finite element method, and the influence of strong and weak interfaces on the failure strength of composite materials is studied. The results show that when the material fails, the strong interface shows brittleness, and the weak interface shows toughness, which can improve the failure strength of the material. At the same time, the effective critical energy release rate is introduced in the calculation, which reduces the fracture toughness of the material, makes the prediction results more consistent with the experimental results, and improves the accuracy of the results. The effect of hole shapes on the failure of the composites is also explored, and the crack propagation of different hole shapes is captured, which shows that the bearing capacity of a plate with a hole is not only related to the shape of the hole but also related to the location of the hole concentrated stress and the number of locations where the hole bears the load. The bearing capacity of the material can be improved by changing the shape of the hole. These results reveal the influence of different factors on the failure of composites and lay a foundation for the effective design of composites.
