Ben He, Ruilong Shi, Na Lv, Feng Dai, Yi Liu, Zelin Yan
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Dynamic Tensile Mechanical Properties and Fracture Mechanism of Sandstone Exposed to Chemical Corrosion
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.
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.
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