摘要
断裂韧度在冰的破坏过程中是一个重要的参数,使用测定岩石力学性质的巴西试验方法测定黄河冰的断裂韧度,通过对有效的载荷—位移破坏过程曲线进行分析,结果表明黄河冰的断裂韧度受应变速率和温度的综合影响:随着应变速率的减小而增大,而随着温度的降低有所减小。黄河冰的断裂韧度与试验选取的试样尺寸关系不大,但试样尺寸的大小会影响试验的成功率。该试验成功率约为70%,可以认为巴西试验具有可行性。
In the process of destruction,the fracture toughness of ice is an important parameter. Brazil test is a widely used method in deter-mining the mechanical properties of rock. This paper used it to determine the fracture toughness of ice from the Yellow River. Through the a-nalysis of effective load-displacement curve of the specimen＇s whole fracture process,it shows that the fracture toughness of the Yellow Riverice is affected by the strain rate and temperature：with the loss of strain rate,fracture toughness increases;with the loss of temperature,itdecreases. The fracture toughness of the Yellow River has no relationship with the size of the samples,but the size will affect the rate of suc-cess.The rate of success in this test is about 70%,which shows that Brazil test is feasible.
出处
《人民黄河》
CAS
北大核心
2017年第4期43-47,共5页
Yellow River
基金
国家自然科学基金资助项目(51579028
41376186)
中央级公益性科研院所基本科研业务费专项资金资助项目(HKY-JBYW-2014-09)
国家工信部高技术船舶科研计划项目(工信部联装[2013]417
工信部联装[2013]412)
关键词
黄河冰
巴西试验
断裂韧度
温度
应变速率
Yellow River ice
Brazil test
fracture toughness
temperature
strain rate
