中文摘要：

为探明粒径对竹粉/不饱和聚酯复合材料力学性能的影响以及力学性能与拉伸断面图像特征之间的关系,采用平板模压法制备了竹粉/不饱和聚酯复合材料并测试了其力学性能,应用局部二元模式直方图的傅立叶特征算法提取复合材料拉伸断面电子显微镜图像特征。结果表明：与20～30目竹粉比较,〉30～40目竹粉/不饱和聚酯复合材料的拉伸强度、弯曲强度与弯曲模量分别提高32.9%、34.4%、25.4%;〉100～120目的复合材料拉伸强度、弯曲强度与弯曲模量则比〉30～40目的分别降低10.6%、20.8%、12.9%;200目竹粉/不饱和聚酯复合材料的拉伸强度与弯曲强度比〉100～120目的分别提高11.7%与18.3%。不同粒径竹粉复合材料拉伸断面图像特征存在差异,具有相似力学性能的复合材料断面图像纹理特征有一定相似性。本文通过拉伸断面图像特征来表征复合材料微观形貌与力学性能的差异,为建立复合材料断面微观形貌与力学性能之间的定量关系提供参考。

英文摘要：

Bamboo particles reinforced unsaturated polyester （UPE） composites were prepared by compression molding and their mechanical properties were evaluated. The effect of bamboo particle size on the mechanical properties of composites, and the quantitative relationship between the features of fractured surface micrographs of composites and their mechanical properties were investigated. The interracial adhesion of bambooAJPE composites was characterized by scanning electronic microscope （SEM）. The features of SEM graphs were quantitatively extracted by Fourier features of local binary pattern histograms. The results showed that the tensile strength, flexural strength and flexural modulus of composites reinforced with 30-40 mesh bamboo particles increased by 32.9%, 34.4%, and 25.4% compared with that of 20-30 mesh bamboo particles, respectively. The tensile strength, flexural strength and fiexural modulus of 100-120 mesh bamboo particles composites decreased by 10.6%, 20.8%, and 12.9% respectively compared with that of 30-40 mesh bamboo particles. While the tensile strength and flexural strength of 200 mesh bamboo particle reinforced composites increased by 11.7% and 18.3% compared with that of 100-120 mesh, respectively. The visual features of SEM graphs from composites fractured surface indicated that there were obvious differences among the SEM graphs of composites with different bamboo particle sizes. The composites with similar mechanical properties have similar texture features extracted from their＇ SEM graphs. Our research proposes a novel approach for characterizing the relationship between the micro-morphology of composites and their mechanical properties by extracting the micrograph features from the fractured surfaces of composites.