论文部分内容阅读
基于DIGIMAT/FE建立含孔隙复合材料细观模型,模型涵盖纤维、树脂和孔隙三相,有效反映了复合材料真实的微结构和细观材料属性,结合通用的ABAQUS/EXPLICIT对细观模型施加超声波激励。通过提取超声波在材料内传播云图,建立了单向连续纤维增强复合材料超声衰减和孔隙率的关系。以T800/环氧树脂复合材料体系为例,研究孔隙尺寸对超声衰减系数模拟结果的影响,并将数值模拟结果与解析模型得到的经验关系进行对比,验证了模型的有效性。该方法能够有效地指导实验过程,为降低复合材料孔隙率、提高其性能提供理论依据。
Based on DIGIMAT / FE, a mesoscopic composite model with pores was established. The model covered three phases of fiber, resin and pore, which effectively reflected the real microstructure and meso-material properties of the composite. Combined with the general ABAQUS / EXPLICIT, excitation. The relationship between ultrasonic attenuation and porosity of unidirectional continuous fiber reinforced composites was established by extracting ultrasonic wave in the material. Taking T800 / epoxy composite system for example, the effect of pore size on the simulation results of ultrasonic attenuation coefficient was studied. The numerical simulation results were compared with the empirical relationships obtained by the analytical model to verify the validity of the model. The method can effectively guide the experimental process and provide a theoretical basis for reducing the porosity and improving the performance of the composite.