| 1. | The consequence is accelerated material fatigue due to overheating 其结果是因过热加速了材料的疲劳。 |
| 2. | Investigation of fatigue property of welded toes by uitrasonic peening method 超声冲击处理焊接接头焊趾区材料的疲劳性能 |
| 3. | The results show that the dendrite , micropore and tensile stress in cladding layer ac the main factors reducing the fatigue properties 结果表明,表面激光熔覆会显著降低材料的疲劳性能,在99 %可靠度的前提下,熔覆试样的安全寿命约为基材试样的27 % 。 |
| 4. | Besides , it may be more important that the fcp equation developed in this study can be applied to predict the fcp curves , and agree well with test results 文献中实验结果的再分析,进一步客观地证明了上述疲劳裂纹扩展速率表达式。而且,更加重要的是,还可利用该式预测材料的疲劳裂纹扩展速率。 |
| 5. | The response of pavement has fast attenuation about the loading point , because of the damp . at last , this paper utilizes the analytic solution to backcalculate the foundation parameter 这一点对解释道面材料的疲劳破坏、材料的松散都有着重要的意义:由于地基模型中考虑了阻尼的影响,使得弯沉在加载点附近的衰减加快。 |
| 6. | The results revealed that the fatigue degradation of the material includes three stages : micro - crack appearing at initial stage , a long process of crack propagation and fatigue . failure of the material after suffering the extraordinary degradation of stiffness 结果表明,材料的疲劳衰变主要分为3个阶段:产生小裂纹的初始阶段;损伤累积扩张阶段;材料刚度加速退化,疲劳破坏阶段。 |
| 7. | In this study , a kind of pcm is used in architecture field , it can make room comfortable and save energy . microcapsulation of pcm ( micropcms ) offers a measure to solve the super - cool problem and interfacial combine with circumstance materials 相变材料应用于建筑材料的方式之一是将其微胶囊化( micropcm ) ,这可以解决相变材料的疲劳及相变材料与周围材料界面等问题,使材料具有较长的使用寿命。 |
| 8. | The 3 - point bending teat was performed on material testing system ( mts ) to investigate the quasistatic and fatigue behavior of ultra - thick 3 - d orthogonal woven composites ( glass / unsaturated resin ) , which aimed to predict the fatigue property of this material 摘要在材料测试系统mts上,采用三点弯曲加载方式对超厚三维正交机织复合材料(玻璃纤维不饱和聚酯)分别进行静态及疲劳试验,对该材料的疲劳性能进行探索和预测。 |
| 9. | In order for using mdyb - 3 pmma safely and economically , it is of engineering significance to study the response of the kind of damage - contained canopy materials and structures withstanding service loading quantitatively , and to develop corresponding analytical techniques 为了安全和经济地使用mdyb - 3航空有机玻璃,有必要对此材料的疲劳和断裂特性进行系统的研究。为此,本文开展了mdyb - 3有机玻璃的断裂参数、疲劳裂纹特性的试验研究和裂纹扩展机理分析。 |
| 10. | The existed material fatigue performance test curves are dealt with and analyzed , and the non - dimensional stress - strain curve , tangent modulus factor curve and fatigue life curve are drawn based on the experiment data , and these three non - dimensional parameter curves are used to find the inherent rules that the test curves can be replaced each other to some extent . it can be concluded that if the common character and system error of these materials are found , the test curve of a certain material can be used for reference by another material . this is a simple approach about fatigue life estimate and is engineering practical 对已有的材料力学疲劳性能试验曲线进行分析整理,利用试验数据绘制了相对应力应变曲线、切线模量因子曲线和疲劳寿命曲线,利用这三种无量纲参数曲线发现了其中存在的规律性,即在某种程度上实验曲线可以互相取代,并用试验数据对此进行了讨论,并由此推断,如果找出材料彼此的共性或彼此之间的系统误差就可以将一种材料的试验曲线供其它材料参考使用,这是一种估算材料的疲劳寿命的简便方法,对工程而言具有实用性。 |