Dynamic Tensile Mechanical Properties and Fracture Mechanism of Sandstone Exposed to Chemical Corrosion

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-05-08 DOI:10.1111/ffe.14672

Ben He, Ruilong Shi, Na Lv, Feng Dai, Yi Liu, Zelin Yan

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Abstract

Dynamic flattened Brazilian disc (FBD) tensile tests are conducted on chemical corrosion treated sandstone samples using the split Hopkinson pressure bar (SHPB). The effects of pH values, soaking time and loading rate on the physical properties, tensile strength, macro progressive failure behaviors, and micro failure characteristics of sandstone are comprehensively investigated. The results show that the chemical corrosion will continuously increase the porosity and decrease the P-wave velocity of sandstone samples. The dynamic tensile strength of sandstone will increase with increasing loading rate, while it decreases with the increase of the soaking time by acidic or alkaline solutions. High-speed photography and digital image correlation analysis show that the progressive failure behaviors of the FBD sample are controlled by the dynamic loading rate. In addition, we further discussed the microscopic tensile failure mechanism of the chemical corrosion treated sandstone by using X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques.

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化学腐蚀下砂岩的动态拉伸力学性能及断裂机理

采用分离式霍普金森压杆（SHPB）对化学腐蚀处理的砂岩试样进行了动态扁平巴西盘（FBD）拉伸试验。全面研究了pH值、浸泡时间和加载速率对砂岩物理性质、抗拉强度、宏观渐进破坏行为和微观破坏特征的影响。结果表明：化学腐蚀会使砂岩试样孔隙度不断增大，纵波速度不断降低；砂岩的动抗拉强度随加载速率的增加而增加，随酸性或碱性溶液浸泡时间的增加而降低。高速摄影和数字图像相关分析表明，FBD试样的渐进破坏行为受动态加载速率的控制。此外，利用x射线衍射（XRD）和扫描电镜（SEM）技术，进一步探讨了化学腐蚀处理砂岩的微观拉伸破坏机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.