Discrete Element Simulation Study on Flexural Strength Test of Phosphogypsum Concrete

DOI

10.2991/978-94-6463-856-1_15How to use a DOI?

Keywords

Failure mechanisms; Phosphogypsum concrete; Discrete element method; Force chains

Abstract

Although phosphogypsum concrete shows great potential in practical applications, there is currently an urgent need for more in-depth research on its mechanical properties and meso-scale failure mechanisms. This study systematically investigates the bending failure mechanisms and mechanical response characteristics of phosphogypsum concrete through a combined approach of discrete element numerical simulations and flexural strength tests. Experimental results demonstrate that phosphogypsum concrete achieves a flexural strength of 25 kN but exhibits significant brittleness. Mesoscale mechanical analysis reveals the intrinsic failure mechanism: weak aggregate-matrix interfacial zones induce localized crack propagation, while the force chain network highlights a lagged redistribution of compressive force chains after fracture surface formation. The evolution of displacement vector fields confirms stress release instability at the critical displacement, aligning closely with the experimentally observed single dominant crack penetration pattern. The cross-scale analysis methodology established in this research provides both theoretical foundations and technical pathways for the design of industrial solid waste-based concrete materials, offering critical insights for optimizing performance and mitigating brittle failure in sustainable construction applications.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Xiaoyong Zhang
AU  - Zhuan Wang
AU  - Xingzhen Huang
AU  - Tiancheng Wang
PY  - 2025
DA  - 2025/09/22
TI  - Discrete Element Simulation Study on Flexural Strength Test of Phosphogypsum Concrete
BT  - Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
PB  - Atlantis Press
SP  - 136
EP  - 145
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-856-1_15
DO  - 10.2991/978-94-6463-856-1_15
ID  - Zhang2025
ER  -