Journal
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
Volume 7, Issue 3, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s40948-021-00284-z
Keywords
Microwave heating; Cell model; Thermal stress; Damage evolution
Funding
- National Natural Science Foundation of China [11872287]
- Found of Shaanxi Key Research and Development Program [2019ZDLGY01-10]
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Microwave processing is an effective technique for improving the mechanical breakage of rocks and rock minerals. This study investigated the heating process of different materials and their effects on crack propagation, interfacial debonding, and failure mode under microwave irradiation. Additionally, theoretical analysis and simulations were conducted to understand the microwave-induced degradation of hard rocks.
Microwave processing is a useful technique for improving the mechanical breakage of rocks and rock minerals. The heating process of microwave absorption materials, transparency materials, and interface properties were investigated in this study. The crack propagation, interfacial debonding, and failure mode of materials under microwave heating were investigated experimentally. The cell model was then established to evaluate the effect of the heating process. In this model, pyrite was considered as a strong microwave absorber, and calcite was assumed to be a non-microwave response phase. The temperature field, stress gradient, and damage evolution of the materials under microwave irradiation were analyzed. Additionally, the effects of microwave power and irradiation time on the mechanical behavior were investigated. Furthermore, the effects of the volume content, particle size, and particle interaction on the heating results were simulated. Theoretical analysis was conducted to understand the related heating phenomenon. This study could enhance the comprehensive understanding of microwave-induced degradation of hard rocks.
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