| 1. | Prestressed concrete sleepers - pretensioning type
预应力混凝土轨枕.预拉伸型 |
| 2. | Study on production process of 2d70 - t651 aluminum alloy plate
651铝合金预拉伸厚板生产工艺研究 |
| 3. | After pretension 0 . 1 strain and pretorsion to 14 , whereas the strength limit keep on increasing in company with the pretorsional capacity
其中屈服极限在预拉伸应变0 . 1后再预扭转14后达到最大值，而强度极限随着预扭转量的提高不断增大。 |
| 4. | Test results showed that the fatigue crack propagation rare increased with increasing the pre - tension deformation degree , especially at the near threshold section
结果表明：随著预拉伸变形量的增加，疲劳裂纹扩展速率提高，尤其是在裂纹扩展的近门槛区。 |
| 5. | The residual stresses in the thick aluminum alloy plates of ly12 , b95 . and 7050t7451 are measured , and the results are analyzed and compared
在此基础上,首次对国产ly12 、美产7050t7451和俄产b95 .三种典型的铝合金预拉伸板内部初始残余应力分布进行了测试和对比分析。 |
| 6. | In the present study , experimental investigations were carried out on the fatigue crack propagation characteristics of x60 pipeline steel after different degrees of pre - tension deformation ( 5 % , 10 % , 15 % )
摘要用单边裂纹试样，研究了x60管线钢经预拉伸变形量为5 % 、 10 %和15 %后的疲劳裂纹扩展特性。 |
| 7. | Moreover , the residual stress in a typical navigation - used 7075t7351 aluminum alloy plate was measured by the proposed method , with the results being finally analyzed and compared with the data obtained by other methods
随后对典型航空用铝合金预拉伸厚板7075t7351的内部残余应力进行了测量，并对测量结果进行了分析和比较。 |
| 8. | The effects of baking temperature , baking time and prestrain on the bake hardenability and dent resistance of isotropic sheet steel and bh sheet steel produced by batch annealing were studied
摘要研究了烘烤温度、烘烤时间和预拉伸应变量对罩式炉退火工艺生产的各向同性钢的烘烤硬化性的影响，并与力学性能相当的冷轧烘烤硬化钢进行了对比。 |
| 9. | 2 . the residual stresses in pre - stretched aluminum alloy plates are successfully measured and analyzed . the measurement precision and applicability of the modified layer removal method are analyzed and evaluated by experiments
2 、铝合金预拉伸板内部残余应力分布规律的研究通过试验研究对改进剥层法测试理论的测试精度及工程实用性进行了分析和评估。 |
| 10. | The results of quantitative analysis showed that the pre - tension deformation reduced the fatigue crack propagation threshold and increased the crack propagation coefficient , and consequently decreased the fatigue resistance of the part with mechanical damage
定量分析表明：预拉伸变形降低了疲劳裂纹扩展门槛值，提高了裂纹扩展系数，从而使管线在机械损伤的部位疲劳抗力降低。 |
