Abstract
The paper describes a numerical XCT image-based finite element approach for characterizing the mechanical behavior influenced by the meso-morphological features of biaxial non-crimp fabric reinforced polymer composite (BNCFRP). The resolution of 49.8190 µm and the combination of CPS3 (matrix) and CPS4R (yarn) ensure lower calculation time. The crack evolution process and failure patterns are influenced by various meso-structures. Therefore, the volume fractions of sub-phases were statistically analyzed through batch processing of numerical simulations on 1381 images. The results from 2D image-based finite element models show that the failure strength has a strong correlation with the internal structure and the mean simulated stress-strain curves differ from experimental results in terms of stiffness and failure stress, with errors of 7% and 13%, respectively. However, the 3D image-based finite element model demonstrates superior accuracy in estimating mechanical properties, with errors remaining below 2%.
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