A numerical modeling method to reproduce the structures of needle-punched nonwoven geotextile based on the actual manufacturing process (web formation and web bonding) was developed. The geotextile model was built based on the statistical characteristics of the computed tomography (CT) observations, physical and mechanical properties of fibers, and physical parameters of the geotextile. A combination of the finite element model and pore network model method was proposed to obtain the pore size characteristics. The appearance and pore size characteristics before and under uniaxial tensile strains were investigated. It is shown that the method can simulate the geotextile manufacturing process satisfactorily. The pore size distribution (PSD) curves obtained from the model show good agreement with the CT-based results. Moreover, the method can reasonably simulate the tensile behaviors of geotextile under uniaxial tensile strain. The specimen necking phenomenon during the uniaxial tensile test was well reproduced. The PSD curves moved towards the direction of larger pore size with increasing uniaxial strain, and characteristic pore sizes (O₉₈, O₉₅, O₅₀, O₃₀, O₁₀) all show a relatively steady increasing trend.

开发了一种基于实际制造过程（纤网形成和纤网粘合）重现针刺非织造土工织物结构的数值建模方法。土工织物模型是根据计算机断层扫描（CT）观测的统计特征、纤维的物理和机械性能以及土工织物的物理参数建立的。提出了有限元模型和孔隙网络模型相结合的方法来获得孔径特征。研究了单轴拉伸应变之前和之下的外观和孔径特征。结果表明，该方法能够较好地模拟土工布的生产过程。从模型获得的孔径分布（PSD）曲线与基于 CT 的结果非常吻合。此外，该方法可以合理模拟土工布在单轴拉伸应变下的拉伸行为。很好地再现了单轴拉伸试验过程中样品的颈缩现象。随着单轴应变的增加，PSD曲线向孔径较大的方向移动，特征孔径(O ₉₈ , O ₉₅ , O ₅₀ , O < b3> , O ₁₀ )均呈现相对稳定的增长趋势。