| 压剪应力场中组合裂纹非共面破裂特征的实验研究 |
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| 引用本文： | 余恒文,宋锦良.压剪应力场中组合裂纹非共面破裂特征的实验研究[J].地球物理学报,1995,38(5):683-687. |
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| 作者姓名： | 余恒文 宋锦良 |
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| 作者单位： | 1. 中国科学技术大学力学与机械工程系, 合肥 230026;
2. 天津大学力学系, 天津 300072;
3. 天津地震局, 天津 300070 |
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| 摘 要： | 通过实验力学方法研究了几种典型组合裂纹非共面破裂特征．实验结果表明，在双轴加载条件下，脆性材料内部的初始不闭合裂纹在受力闭合之前出现新裂纹，扩展裂纹中不仅有张性裂纹，而且有剪切裂纹，部分甚至还出现逆向剪切裂纹．对单轴加载和双轴加载两种条件下裂纹的破坏规律作了比较．
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| 关 键 词： | 压剪应力场 组合裂纹 共面破裂特征 |
| 收稿时间： | 1993-02-22 |
EXPERIMENTAL RESEARCH ON NON-COPLANERY GROWTH OF COMPLEX CRACKS IN COMPRESSION-SHEAR FIELD |
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| YU HENG-WEN.EXPERIMENTAL RESEARCH ON NON-COPLANERY GROWTH OF COMPLEX CRACKS IN COMPRESSION-SHEAR FIELD[J].Chinese Journal of Geophysics,1995,38(5):683-687. |
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| Authors: | YU HENG-WEN |
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| Institution: | 1. University of Science and Technology of China, Hefei 230026;
2. Tiantsin University, Tiantsin 300072;
3. Tiantsin Seismological Bureau, Tiantsin 300070 |
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| Abstract: | This paper studies the non-coplanery rupture characteristics of a set of typical complex cracks in the seismological physics by means of experimental mechanics.Crack's dynamic feature is clearly shown.Results show that,new cracks in the brittle materials start to grow before the closure of the preexisting cracks which is under biaxial loading condition.These new cracks are composed of not only tensile cracks but also shearing ones,in some cases the backing-up shearing cracks can also be seen.Different rupture laws between the uni-axial and the bi-axial loading conditions have also been carefully studied. |
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| Keywords: | Compression-shear field Complex cracks Non-coplanery rupture |
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