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Article

Study on the Micro Mechanism of Failure Evolution of Desulfurization Gypsum–Fly Ash Fluidized Lightweight Soil Based on Discrete Element Method

School of Civil Engineering, Shandong Jiaotong University, 5 Jiaoxiao Road, Jinan 250357, China
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Author to whom correspondence should be addressed.
Coatings 2024, 14(8), 968; https://doi.org/10.3390/coatings14080968
Submission received: 15 July 2024 / Revised: 30 July 2024 / Accepted: 31 July 2024 / Published: 2 August 2024
(This article belongs to the Special Issue Recent Progress in Reinforced Concrete and Building Materials)

Abstract

To investigate the macroscopic mechanical properties and failure evolution mechanism of desulfurization gypsum–fly ash fluid lightweight soil, a microscale numerical model using PFC2D (Particle Flow Code) was constructed. Uniaxial compression tests were conducted to determine the microscopic parameters of the model, extracting information on the discrete fracture network type, quantity, age, and particle displacement trend. The crack morphology and propagation evolution of desulfurization gypsum–fly ash fluid lightweight soil were explored, and the destructive properties of desulfurization gypsum–fly ash fluid lightweight soil material were evaluated through energy indicators. The research findings suggest that the discrete element numerical model effectively simulates the stress–strain curve and failure characteristics of materials. Under uniaxial compression conditions, microcracks dominated by shear failure occur in the initial loading stage of desulfurization gypsum–fly ash fluid lightweight soil, with a through crack dominated by tensile failure appearing once the load exceeds the peak stress. The dissipated energy evolution in the flow state of desulfurization gypsum–fly ash fluid lightweight soil is relatively gentle, leading to delayed cracking after surpassing the peak stress point.
Keywords: desulfurization gypsum–fly ash fluidized lightweight soil; uniaxial compression test; discrete element; crack evolution; energy damage evolution; meso mechanism desulfurization gypsum–fly ash fluidized lightweight soil; uniaxial compression test; discrete element; crack evolution; energy damage evolution; meso mechanism

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MDPI and ACS Style

Li, X.; Zuo, S.; Xu, X.; Li, H. Study on the Micro Mechanism of Failure Evolution of Desulfurization Gypsum–Fly Ash Fluidized Lightweight Soil Based on Discrete Element Method. Coatings 2024, 14, 968. https://doi.org/10.3390/coatings14080968

AMA Style

Li X, Zuo S, Xu X, Li H. Study on the Micro Mechanism of Failure Evolution of Desulfurization Gypsum–Fly Ash Fluidized Lightweight Soil Based on Discrete Element Method. Coatings. 2024; 14(8):968. https://doi.org/10.3390/coatings14080968

Chicago/Turabian Style

Li, Xiuliang, Shen Zuo, Xiaoyu Xu, and Haojie Li. 2024. "Study on the Micro Mechanism of Failure Evolution of Desulfurization Gypsum–Fly Ash Fluidized Lightweight Soil Based on Discrete Element Method" Coatings 14, no. 8: 968. https://doi.org/10.3390/coatings14080968

APA Style

Li, X., Zuo, S., Xu, X., & Li, H. (2024). Study on the Micro Mechanism of Failure Evolution of Desulfurization Gypsum–Fly Ash Fluidized Lightweight Soil Based on Discrete Element Method. Coatings, 14(8), 968. https://doi.org/10.3390/coatings14080968

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