| 1. | The highest stress range occurs near the support .
其最高应力范围发生在近支撑处。 |
| 2. | The stress range histogram was used to estimate the effective root-mean-square stress range .
应力范围直方图可用作估算等效均方根应用力范围。 |
| 3. | Range of alternating stresses
交变应力范围 |
| 4. | Safe range of stress
安全应力范围 |
| 5. | In the process of loading , the stress around the junction linearly increases at first and then the range of the high stress area enlarges
在逐步加载过程中，加载前期相贯区周边应力呈线性增长，一定程度后主要表现为高应力范围的扩大。 |
| 6. | Tensile creep and rupture tests have been performed under vacuum for temperatures ranging from 1100 to 1500 and for stresses from 180mpa to 290mpa
基纤维体积分数约为40 。蠕变持久实验的应力范围为180mpa 290mpa ，温度范围为1100 1500 。 |
| 7. | It seemed that the fiber and the matrix did not creep themselves in the range of the testing stress and temperature , so the matrix microcracking and interfacial sliding will be the main contributer to the macroscopic deformation of the three - dimensional c / sic composite
由于在所测定的温度区间和应力范围内，碳纤维和基体本身都不大可能发生蠕变。因此，基体开裂和界面的滑动是3d - c sic复合材料宏观变形的主要贡献者。 |
| 8. | To prevent premature failure of the reinforced plastic fiberglass sucker rod , high quality products should be purchased , proper wells should be selected , the rod string design should be based on the stress range chart and operation and management should be carried out according to requirements
为防止玻璃钢抽油杆早期失效，应严把产品进货质量关；正确选择油井；按应力范围图进行玻璃钢杆柱设计；按要求作业施工；完善生产管理措施。 |
| 9. | However , the die attach layer delaminated after 500 cycles and pcb cracked in the underfilled samples after long time cycling . c - sam is employed to investigate the delamination in the underfilled samples . highly concentrated stress - strain induced by the cte mismatch between the bga component and the pcb board , coarsened grain and two kinds of intermetallic compounds ( nisn / nisns ) which formed during reflow and thermal cycle and their impact on the reliability of solder joints are discussed in this paper
充胶样品粗化尤为严重； ? ni - sn金属间化合物包括两层：其中，靠近ni焊盘的那层比较平整，同时， eds结果分析表明其化学式近似为nisn ，而靠近焊料的那层呈板条状，化学式近似为nisn _ 3 ，文献表明其为亚稳相； ?充胶使得样品最大应力范围降了接近一个数量级并降低了dnp的作用，同时，器件失效模式变为芯片粘接层分层； ? c - sam结果表明本论文采用的充胶样品，芯片粘接层分层起始于500周左右，而经过2700周循环的样品，分层几乎扩展到整个界面。 |
| 10. | To set up reasonable designing and manufacturing techniques and accurate calibration system and to speed up forming the native pvdf pressure sensors is the direction of this project . first , based on the piezoelectric theorem , the theoretic support of pvdf pressure sensors is deduced . according to purposes of practical projects , special purpose sensor configurations are designed and the corresponding calibration system based on shpb ( split hopkinson pressure bar ) technique is built in succession
本文从压电材料的一般压电控制方程开始，导出了pvdf压电薄膜测压技术的相关论据；根据测试目的以及被测结构的特点，设计了多种夹心式的传感器构造形式；摸索出了一套基于国产pvdf压电薄膜制作压力计的加工、安装工艺；建立了一套基于系统集成技术的多点pvdf压力测试的数据采集、处理系统；建立了一套基于shpb技术、适用于实际工程应力范围的pvdf压力计的动态标定方法，并对两种厚度的国产pvdf压电薄膜进行了标定。 |
