微波照射下花岗岩单轴压缩损伤本构模型  

Constitutive Model of Granite Uniaxial Compression Damage under Microwave Irradiation

作　　者：戴俊[1] 杨清清 张敏 蒋昊轩 王林涛 任一平 DAI Jun;YANG Qing-qing;ZHANG Min;JIANG Hao-xuan;WANG Lin-tao;REN Yi-ping(College of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710000,China)

机构地区：[1]西安科技大学建筑与土木工程学院,西安710000

出　　处：《科学技术与工程》2023年第19期8350-8357,共8页Science Technology and Engineering

基　　金：国家自然科学基金(51174159);陕西省自然科学基础研究计划(2017JQ5069);陕西省教育厅专项科学研究基金(15JK1471)。

摘　　要：为深入研究微波照射花岗岩的损伤演化过程以及探讨微波照射过的花岗岩进行单轴压缩后花岗岩应力-应变关系,首先以微波照射花岗岩的损伤特性为基础,综合考虑花岗岩在微波照射以及荷载作用下受到的损伤,将Weibull分布与损伤力学结合,得到考虑多因素作用的花岗岩损伤演化方程。然后根据Lemaitre应力等效原理及Hook定律,推导出考虑微孔隙闭合的花岗岩损伤本构模型。最后,采用微波循环照射花岗岩试验和单轴压缩试验对模型进行验证。验证结果显示,本研究建立的本构模型与试验结果拟合的曲线能较好吻合,证明了模型的合理性及参数取值的正确性。为岩石微波损伤理论的研究以及微波辅助破岩提供思路。In order to further study the damage evolution process of microwave-irradiated granite and discuss the stress-strain relationship of granite after uniaxial compression of microwave-irradiated granite,firstly,based on the damage characteristics of microwave-irradiated granite,comprehensively considering the damage of granite under microwave irradiation and loading,and combining Weibull distribution with damage mechanics,the granite damage evolution equation considering multi-factor action was obtained.Then,according to the Lemaitre stress equivalence principle and Hook s law,a granite damage constitutive model considering micropore closure was derived.Finally,the microwave cycle irradiation granite test and uniaxial compression test were used to verify the model.The verification results show that the constitutive model established can match the curve fitted with the experimental results well,which proves the rationality of the model and the correctness of the parameter values.It provides ideas for the study of rock microwave damage theory and microwave-assisted rock breaking.

关 键 词：微波照射 损伤力学 本构模型 WEIBULL分布 

分 类 号：TU452[建筑科学—岩土工程]