| 1. | No evidence of fatigue crack extension was detected in the silver memorial bridge nor the fremont bridge .
在西尔费纪念桥和弗里蒙特桥都没有检查出疲劳裂纹扩展的证据。 |
| 2. | Some crack extension probably developed from the unfused section of the butt weld across the thickness of the stiffener during transport and erection .
有些裂纹可能在运输和安装过程中就从加劲肋对接焊未熔透处开始发展。 |
| 3. | Crack extension resistance curve of concrete
混凝土裂缝扩展阻力曲线 |
| 4. | Crack extension criterion
裂纹扩展判据 |
| 5. | Crack extension force
裂纹扩展力 |
| 6. | Fracture mechanics toughness tests - method for determination of fracture resistance curves and initiation values for stable crack extension in metallic materials
断裂机械韧性试验.金属材料稳定裂纹延伸的抗断裂曲线和初始值的测定方法 |
| 7. | The thermal fatigue resistance of al2o3 - 20wt . % tic is the best , it is due to high kic and pore of the material . the pore decrease the stress extension of tip of cracks and delay themal shock fatigue cracks extension . 4
含20wt . tic的复合陶瓷具有高的k _ ( 1c )和较多的孔隙，这些空隙在热震疲劳时降低热震疲劳裂纹尖端的应力集中并阻碍裂纹扩展从而提高了材料的断裂抗力，故其具有最好的抗热疲劳性能。 |
| 8. | With this in minds , many researchers have proposed a variety of models for describing the nonlinear fracture of concrete for the past decades . amid them most take the critical stress intensity factor kic as the fracture toughness , a sign of ability to resist the crack extension
对此，在过去的几十年里，众多研究人员提出了很多描述混凝土非线性断裂的模型，而其中的大多数断裂模型都以临界应力强度因子k _ ( ic )作为抵抗裂缝扩展阻力的断裂韧度。 |
| 9. | Reduction crack in the pumping transfer concrete during the megathermal climateit is a diffcult problem . the unit undertaking project of no : 4 pump station for diverting water from the south to the north make a beneficial explore form the design of mix proportionging , control and the concret placing temperature to control the crack extension those experience can be referenced by the unit in charge of large scale pumping station project
摘要高温季节泵送混凝土裂缝控制的当前工程界一个难题，南水北调淮安四站工程建设中，建设单位科学安排、精心施工，从控制混凝土配合比、入仓温度等多方面着手，对混凝土裂缝控制技术进行了有益的探索，并取得了预期的效果，为混凝土抗裂技术积累了经验，对同类型泵站的施工具有重要的参考意义。 |
| 10. | Using ct ndt , the inner - structure characteristics of samples of the frozen soil under uni - axial compression were investigated , and the process of damage is separated into two regions : e . g . plastic damage and cracks extension damage . the determination methods of damage values for different levels were proposed and the damage values were calculated
随后对冻土在单轴压缩过程中的损伤特征进行了讨论，对不同阶段的损伤量给出了计算方法，分别对饱水冻土和未饱水冻土在单轴压缩过程中的损伤量进行了计算。 |
