Dynamic compression mechanical properties of eco-friendly ultra-high performance concrete produced with aeolian sand: Experimental and three-dimensional mesoscopic investigation. (June 2022)

• Record Type: Journal Article
• Authors: Feng, Taotao; Wang, Fengjuan; Tan, Yongshan; Yue, Chengjun; Xu, Wenxiang; Liu, Zhiyong; Yang, Zhiqiang; Wu, Yirui; Jiang, Jinyang
• Is Part Of: International journal of impact engineering. Volume 164(2022)
• Publication Date: 2022-06
• Subjects: Dynamic mechanical properties -- Ultra-high performance concrete -- Aeolian sand, Mesoscale model; Impact -- Periodicals; Shock (Mechanics) -- Periodicals; Impact -- Périodiques; Choc (Mécanique) -- Périodiques; Impact; Shock (Mechanics); Periodicals; 620.1125
• DOI: 10.1016/j.ijimpeng.2022.104192
• Languages: English
• ISSNs: 0734-743X

Abstract

Highlight: A novel method for three-dimensional modeling of end-hook steel fibers in UHPC was proposed. The dynamic compression behavior of aeolian sand-based UHPC was studied via the split Hopkinson pressure bar technique and 3D mesoscale simulation, and the impact compression finite element model parameters suitable for aeolian sand UHPC were determined. The effects of strain rate, fiber content and matrix strength on the dynamic mechanical properties of aeolian sand-based UHPC were determined, which have a profound significance for its application in protection engineering. Abstract: The dynamic mechanical properties of ultra-high performance concrete (UHPC) containing aeolian sand was studied via the split Hopkinson pressure bar technique and three-dimensional mesoscopic numerical simulation. A novel method for three-dimensional modeling of end-hook steel fibers was proposed. Employing the 3D mesoscale model, the dynamic compressive responses of aeolian sand-based UHPC were simulated and analyzed. Simulation results exhibited constitutive relationships and failure patterns that agree well with the impact test results, which verified that the established three-dimensional mesoscopic model enables effective analysis of the dynamic mechanical properties of aeolian sand-based UHPC. Then the effects of strain rate, fiber content and matrix strength on the stress-strain relation and energy evolution process were quantitatively discussed, which provide a basis for the application of aeolian sand-based UHPC.