摘要
目的改进Hobbs公式得到的计算值普遍较大这一问题,提出圆环巴西试验的抗拉强度建议公式。方法对巴西试验圆环的应力解进行分析,并引用砂岩的试验数据验证。结果得到圆环巴西试验的抗拉强度建议公式,使用Hobbs公式得到的抗拉强度σTT比巴西圆盘试验σT大6倍以上,利用建议公式得到的抗拉强度σθ与巴西圆盘试验σT十分接近,误差不到1%。结论当圆环内外径比ρ在0.05到0.15的范围内时,该建议公式可很好地用来计算岩石类等脆性材料的抗拉强度。
Objective To propose a formula for the tensile strength of the ring Brazil test and eliminate the problem that the calculated values obtained by the Hobbs formula are generally larger.Methods The stress solution of the Brazilian test ring was analyzed and the sandstone experiment data for verification was cited.Results The proposed formula of the tensile strength of the ring Brazil test was obtained;the tensile strength obtained through the Hobbs formula was six times more than that of the Brazilian disc test;and the tensile strength obtained through the proposed formula was very close to the Brazilian disc test with an error of less than 1%.Conclusion The proposed formula can be used to calculate the tensile strength of brittle materials when the inner and outer diameter ratio ρ of the ring specimen is in the range of 0.05 to 0.15.
作者
王杰
陶俊林
郭辉
WANG Jie;TAO Jun-lin;GUO Hui(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)
出处
《装备环境工程》
CAS
2019年第2期42-46,共5页
Equipment Environmental Engineering
关键词
圆环试件
劈拉试验
抗拉强度公式
ring specimen
splitting test
tensile strength formula
