| 1. | ( 4 ) the relationship between electric emission pluse and the propagation of cracks in concrete under quasi - static loading is exhibited
( 4 )揭示了混凝土在准静载下裂纹扩展与电发射脉冲之间的关系。 |
| 2. | This concentration of stress further accelerates cartilage wear with thinning of outer layers and propagation of cracks and fissures in the deeper layers
集中的应有尽有力进一步加速外民支软骨磨损及变薄，也加速深层碎裂和裂隙的扩布。 |
| 3. | It is shown that the first resonant frequency and the first anti - resonant frequency decrease synchronously due to the propagation of crack
从该曲线可以发现，梁的第一阶谐振频率和反谐振频率都随裂纹的出现而减小，并且频率减少量随裂纹尺寸的增大而增加。 |
| 4. | The results show that the thermal fatigue cracks after forming propagate preferentially in the hard phase , and the propagation of crack is stoped and dulled when it meet steel basic phase
结果表明:萌生后的热疲劳裂纹优先在硬质相中扩展,遇到钢基体相后受阻、钝化。 |
| 5. | ( 3 ) the methods of detecting sub - critical propagation of cracks in concrete dams are explored by use of grey system theory , motion stability theory and catastrophe theory , and three criteria for sub - critical crack propagation are given
( 3 )采用灰色系统理论、运动稳定性理论和突变理论，研究了混凝土坝裂缝亚临界扩展识别方法，给出了三个裂缝亚临界扩展判据。 |
| 6. | In this paper , through the statistical analysis of the random factors in the stage of sub - critical propagation of cracks , the statistical correlation equations between the two material coefficients are obtained and can be generalized . furthermore , it can be concluded that cracks propagation rate is influenced greatly by material coefficients in the condition considered in this study
本文主要通过对亚临界裂纹扩展阶段各种随机因素的统计分析，找到了可以推广应用的，体现两材料系数之间具有强负相关性的统计相关式，并验证了在一定条件下，材料系数是影响裂纹扩展速率的主要因素。 |
