| 1. | Fatigue mechanism of girder of bridge crane
桥式起重机主梁结构疲劳机理分析 |
| 2. | The design method of fatigue is usually established by way of fatigue tests home and abroad . a few of studies on its fatigue mechanism and life estimation are proceeded presently
目前国内外对其疲劳性能的研究大多借助疲劳试验以建立其验算方法，而对疲劳破坏机理及疲劳寿命估算研究甚少。 |
| 3. | It is , therefore , of academical and practical importance to investigate and to clarify the electrical fatigue mechanism of ferroelectrics by using on - line or in - situ technologies
采用现场或原位技术观测电疲劳过程中电畴的变化对研究和探明这类材料的电疲劳机理具有重大的理论指导意义和实际应用价值。 |
| 4. | In chapter 2 , the fatigue mechanism of automobile half shaft is studied ; and intensified coefficient model based on fatigue failure theory and programmed load spectrum technology is also provided
第二章研究汽车驱动桥半轴疲劳破坏机理，在零件疲劳损伤理论和程序载荷谱处理技术基础之上给出路面强化系数模型。 |
| 5. | 4 , the flexural fatigue behavior of concrete is improved effectively though mixed steel fibers and polypropylene fibers . 5 , flexural fatigue mechanism was analyzed . the improving and damaging mechanism were studied
5 、对层布式混杂纤维混凝土的抗折疲劳机理进行了分析，初步探讨了混杂纤维混凝土的纤维增强机理及破坏机理。 |
| 6. | In this paper , a lot of macro and micro fracture sections under equal and variable amplitude loads are analyzed on 40cr high - strength bolts by use of scan - electronic microscope . its fatigue mechanism is known fundamentally
本文以螺栓球节点网架中最常用的40cr高强螺栓为研究对象，借助扫描电子显微镜等先进仪器对40个常幅及变幅疲劳试件断口进行了宏观及微观形貌分析，基本摸清了其疲劳破坏的机理。 |
| 7. | The research of high performance pavement concrete ( hppc ) is done in two sides . one is mixture design , the other is pavement performance . the mixture design and design flowchart of hppc is given on the base of nc with the consideration of characteristic of both hppc and nc . the grow law , influencing factor and formation mechanism of hppc strength is analisised by perpendicular experiment . in the same , the fatigue equations are set up for hppc and hppc i on the base of fatigue experiment . the fatigue mechanism of hppc is analysised by damage mechanics and fracture mechanics . brittleness , frost resistance and abrasion resistance of hppc is researched with the camparition to nc i . at last , the economic analysis of hppc is done by two kinds of way
结合高性能混凝土与普通路面混凝土的特点，提出了建立在普通路面混凝土基础上的高性能路面混凝土配合比设计方法，给出了设计流程；通过正交试验(强度试验) ，分析了高性能路面混凝土的强度发展规律、影响因素与形成机理；同时，根据疲劳试验结果采用双参数weibull分布模型分别建立了高性能路面混凝土和高性能路面混凝土(没有掺加硅粉)疲劳方程，应用损伤力学和断裂力学，分析了高性能路面混凝土的疲劳机理；并采用了对比分析方法，研究了高性能路面混凝土的脆性、抗冻性和耐磨性等。 |
| 8. | The article put forward the significance , theory and technique of the driving axle testing ; thoroughly studied the fatigue mechanism of half shaft and intensified coefficient model ; and also designed hcq3 . 0 computer acquisition and control hardware system based on thoroughly studying some key technology
本文阐述了汽车驱动桥综合性能测试的意义、原理和技术方法；分析了汽车驱动桥半轴疲劳破坏机理及其路面强化系数模型；在深入研究有关关键技术问题的基础上设计了hcq3 . 0试验台计算机数据采集与控制硬件系统。 |
