| 王杰,陶俊林,郭辉.圆环巴西试验的抗拉强度建议公式[J].装备环境工程,2019,16(2):42-46. WANG Jie,TAO Jun-lin,GUO Hui.Proposed Formula for Tensile Strength of Ring Brazil Test[J].Equipment Environmental Engineering,2019,16(2):42-46. |
| 圆环巴西试验的抗拉强度建议公式 |
| Proposed Formula for Tensile Strength of Ring Brazil Test |
| 投稿时间：2018-10-17 修订日期：2019-02-25 |
| DOI：10.7643/ issn.1672-9242.2019.02.009 |
| 中文关键词: 圆环试件 劈拉试验 抗拉强度公式 |
| 英文关键词:ring specimen splitting test tensile strength formula |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
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