摘要
采用工业微波炉对花岗岩进行不同微波功率照射试验,分析经微波照射后的应力-应变曲线、抗拉强度、抗压强度和弹性模量等变化规律,探究微波照射对岩石力学性能的影响。研究结果表明:超过3.33 kW功率照射时,裂隙压密阶段的应力-应变曲线显著变长,随着微波功率的提高,试件破坏形式由脆性破坏向延性破坏转变;花岗岩的峰值应力、抗拉强度、弹性模量均随着微波照射功率增加发生不同程度折减,而峰值应变逐渐增大;基于弹性模量损伤变量和抗拉强度损伤变量增长速率,微波照射功率对损伤影响存在临界区间,在1.33~2.66 kW功率照射范围内,岩石损伤变量折减幅度最大。
In order to study the effect of microwave irradiation on rock damage,industrial microwave waves tested granite with different microwave power,analyzed the stress-strain curve,tensile strength,compression strength and elastic modulus,and explored the effect of microwave irradiation on rock mechanical properties.The results show:Over 3.33 kW power irradiation,the stress-strain curve crack compaction stage is significantly longer,and with the improvement of microwave power,the specimen damage form changes from brittle damage to delayed damage;The peak stress,tensile strength and elastic modulus of granite all decrease to varying degrees with the increase of microwave irradiation power,while the peak strain gradually increases;Based on the growth rate of the elastic modulus damage variable and the tensile strength damage variables,there is a critical interval for the impact of microwave irradiation power on the damage,and the rock damage variable reducing the largest within 1.33~2.66 kW power irradiation.
作者
戴俊
张敏
杨凡
翟惠慧
朱清耀
DAI Jun;ZHANG Min;YANG Fan;ZHAI Hui-hui;ZHU Qing-yao(School of Architecture and Civil Engineering,Xi′an University of Science and Technology,Xi′an,Shanxi,710054,China)
出处
《建材技术与应用》
2022年第2期1-6,共6页
Research and Application of Building Materials
基金
国家自然科学基金项目(51174159)。
关键词
微波照射
花岗岩
损伤变量
抗拉强度
抗压强度
microwave irradiation
granite
damage variable
tensile strength
pressure resistance
