官方研究亮点：冻融循环下聚酯纤维增强水泥基复合材料的微观结构损伤（micro-CT 研究）Official Publication Spotlight: Freeze–Thaw Damage in Fiber-Reinforced Cementitious Composites (Micro-CT Study)
Dragonfly 官网新增研究亮点专栏，推介发表于 Materials & Design 的开放获取论文：研究团队用时间序列 micro-CT（11 微米体素）对聚酯纤维增强水泥基复合材料做了 100 次冻融循环跟踪扫描，在 Dragonfly 3D World 中用深度学习分割实现灰度重叠的非均质材料的可靠相分离，并定量追踪了孔隙与裂纹网络的演化。100 次循环后，孔隙加裂纹的体积分数从百分之十升至百分之二十一，纤维与基体的界面因应力集中放大了局部开裂；热机械分析认为冰与水泥基体的热膨胀失配是主导开裂机制。论文全文开放获取（DOI: 10.1016/j.matdes.2025.115256）。The official Dragonfly site spotlights a new open-access paper in Materials & Design: the team tracked a polyester fiber-reinforced cementitious composite across 100 freeze–thaw cycles with time-lapse micro-CT (11 µm voxel), using Dragonfly 3D World's deep-learning segmentation to achieve reliable phase separation in a heterogeneous material with overlapping gray levels, and quantified how pore/crack networks evolve. After 100 cycles, pore-plus-crack volume fraction rose from 10.0% to 21.0%; fiber–matrix interfaces amplified local cracking through stress concentration, and a thermo-mechanical interpretation identifies thermal-expansion mismatch between ice and the cement matrix as the dominant cracking mechanism. The paper is open access (DOI: 10.1016/j.matdes.2025.115256).