Penzel Paul, Lang Tobias Georg, Weigel Philipp Benjamin, Gereke Thomas, Hahn Lars, Hilbig Arthur, Cherif Chokri
Institute of Textile Machinery and High Performance Material Technology (ITM), Technische Universität Dresden, 01069 Dresden, Germany.
Institute of Machine Elements and Machine Design, Technische Universität Dresden, 01069 Dresden, Germany.
Materials (Basel). 2023 Mar 30;16(7):2767. doi: 10.3390/ma16072767.
Textile reinforcements are increasingly establishing their position in the construction industry due to their high tensile properties and corrosion resistance for concrete applications. In contrast to ribbed monolithic steel bars with a defined form-fit effect, the conventional carbon rovings' bond force is transmitted primarily by an adhesive bond (material fit) between the textile surface and the surrounding concrete matrix. As a result, relatively large bonding lengths are required to transmit bond forces, resulting in inefficient material utilization. Novel solutions such as tetrahedral profiled rovings promise significant improvements in the bonding behavior of textile reinforcements by creating an additional mechanical interlock with the concrete matrix while maintaining the high tensile properties of carbon fibers. Therefore, simulative investigations of tensile and bond behavior have been conducted to increase the transmittable bond force and bond stiffness of profiled rovings through a defined roving geometry. Geometric and material models were thus hereby developed, and tensile and pullout tests were simulated. The results of the simulations and characterizations could enable the optimization of the geometric parameters of tetrahedral profiled rovings to achieve better bond and tensile properties and provide basic principles for the simulative modeling of profiled textile reinforcements.
由于其高拉伸性能和在混凝土应用中的耐腐蚀性，纺织增强材料在建筑行业中越来越占据一席之地。与具有明确形状配合效果的带肋整体钢筋不同，传统碳纤维粗纱的粘结力主要通过纺织表面与周围混凝土基体之间的粘结（材料配合）来传递。因此，传递粘结力需要相对较大的粘结长度，导致材料利用效率低下。诸如四面体异形粗纱之类的新颖解决方案有望通过与混凝土基体形成额外的机械互锁，同时保持碳纤维的高拉伸性能，从而显著改善纺织增强材料的粘结性能。因此，已经进行了拉伸和粘结行为的模拟研究，以通过确定的粗纱几何形状来提高异形粗纱的可传递粘结力和粘结刚度。由此开发了几何和材料模型，并模拟了拉伸和拔出试验。模拟和表征结果可以优化四面体异形粗纱的几何参数，以实现更好的粘结和拉伸性能，并为异形纺织增强材料的模拟建模提供基本原理。
