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- Pb-free solder;BGA;thermal cycling;dynamic fatigue tests;electrical analysis. 关键词:无铅焊锡;球格阵列构装;冷热循环试验;动态疲劳试验;电性分析
- By fatigue test of bolt material,the stress-strain life curve is obtained. 通过螺栓材料的疲劳试验,获得了材料的应力应变寿命曲线;
- Conduct material Fatigue Testing and Thermal stress test. 进行材料疲劳测试和热应力测试。
- The impact fatigue tests show that the tufftride process has a bad influance on impact fatigue properties of materials. 同时,冲击疲劳试验表明:软氮化处理使冲击疲劳性能劣化,这是因表面硬化层约束了柔软心部,使整体材料的韧性变差的结果。
- Various proportional and nonproportional tension-torsion fatigue tests were conducted on aeronautic material, LY12CZ. 对航空材料LY12CZ进行多种比例和非比例加载试验。
- The strength and fatigue tests have shown that the hybrid composite driveshaft is reasonable. 研制的混杂复合材料传动轴经强度和疲劳试验证明是合理可行的。
- Based on the program load spectrum, intensified fatigue test for rearaxleare made. 在编制程序载荷谱的基础上,对后桥壳体进行了强化疲劳试验。
- Using newly developed filament-wound composite tubular specimens, the tension-torsion biaxial loading fatigue tests were performed. 同时设计出一种缠绕复合材料管状试样，进行了拉扭双轴疲劳实验研究。
- The method of correlation factor is an effective method to loads transacting of the fatigue test of airplane structure. 相关系数法是一种有效的飞机疲劳试验载荷处理方法。
- In order to overcome such problem, a new technique named as VFT (Virtual Fatigue Test) has been offered in this paper. 为了克服这两个难点，论文提出了基于虚拟样机理论的“虚拟疲劳试验”技术。
- Tension and fatigue tests on a widely used packaging epoxy molding compound (EMC) were performed under room and high temperatures. 对在微电子封装中应用很广的环氧模塑封装材料进行了常温和高温下的拉伸、疲劳实验。
- Fatigue test is done on medium carbon steel specimens with small surficial pre-cracks and single-edge pre-cracks. 采用带有微小表面预制裂纹和边缘预制裂纹的中碳钢试验片进行了疲劳实验。
- The piston rod of family sedan's rear snubber fractured duringearlier stage of rotary bending fatigue test. 家轿后减振器活塞杆在进行旋转弯曲疲劳试验时出现早期断裂。
- Three kinds of fatigue tests at certain stress ratio for unidirection T300/QY8911 Carbon/Bismalimide composite laminates were performed to obtain the S-N curves. 摘要测定了碳纤维／树脂基T300/QY8911复合材料的3组典型单轴循环应力下的S-N曲线。
- Based on the results obtained from fatigue tests under pulsating internal pressure, the mechanism of dynamic autofrettage of thick wall-cylinder components is stu... 本文基于脉动内压疲劳试验结果,对厚壁圆筒构件的动态自增强原理进行了分析研究。
- Tne formula under given fracture length is verified by fatigue test datas of welded box girder on overhead travelling crane. 并用桥式起重机焊接箱形梁的疲劳试验数据，对给定裂纹长度时构件疲劳可靠度的计算公式进行验算。
- Abstract： The piston rod of family sedan’s rear snubber fractured during earlier stage of rotary bending fatigue test. 摘 要： 家轿后减振器活塞杆在进行旋转弯曲疲劳试验时出现早期断裂。
- At present,tuning-folk resonance plate structure is common used in crankshaft bending fatigue test bench in domestic diesel engine industry. 目前,国内柴油机行业普遍使用的曲轴弯曲疲劳强度试验台架,均采用音叉共振板结构。
- Tension and bending fatigue tests were carried out to investigate the fatigue behavior of polymethyl methacrylate for edge attachment element at different temperatures. 摘要研究了有机玻璃边缘连接元件在不同温度下的拉伸和弯曲疲劳特性。
- The effect of temperature on cyclic fatigue life and fracture mechanism on 2524-T4 aluminum alloy was studied by cyclic fatigue test,SEM and TEM. 采用疲劳实验、SEM及TEM等分析测试手段,研究温度对2524-T4合金疲劳寿命及断裂机制的影响。
