Long - span bridges service under long - term transportation loads , strength degradation of structure materials because of fatigue cumulative damage is key factor of durability 大型钢桥是在交通载荷作用下长期工作的,疲劳累积损伤引起结构材料强度逐渐退化,成为大型钢桥耐久性的关键因素。
Reaction . put it pad to the within of pumps and valves , not only conquer the shortcoming of intensity laigh of the fluorine plastics stuff but also ravel out deficiency of bad capability 将其内衬于泵阀内壁，既克服了氟塑料材料强度低的缺点，又解决了泵阀主体材料抗腐蚀性能差成本高的不足。
Accordingly , a series improvement measures , such as replacing bolts with double - screw bolts , filling the gap between the double screw bolts and the torque divider with fluid sealant , etc . , are proposed 并由此提出了将螺栓改为螺柱、在螺柱的光杆部分采用密封胶填充、提高螺柱材料强度等一系列措施。
Thompson , m . k . , " the anchorage behavior of headed reinforced in cct nodes and lap splices , " phd dissertation , department of civil , architectural and environmental engineering , university of texas , austin , texas ( 2002 ) 萧文昌,材料强度对低型剪力墙动态行为之影响,硕士论文,国立成功大学土木工程研究所,台南( 1993 )
Influence of holes in the 3d braided cmc on fracture toughness is discussed preliminarily at last . and studying results indicate that the holes toughening effect is n ' t ideal at a cost of material strength 讨论了三维编织cmc复合材料中的孔洞对断裂韧性的影响，发现以牺牲材料强度为代价的孔洞增韧机制的效果并不理想。
Finally , use spss analyzing experiment data , the most suitable mix design was gained , and an experience expression about material strength and cement / water ratio was found 通过对试验数据的分析，给出了最优配合方案，利用spss验证经验公式，给出了高强水泥基材料强度与胶水比的经验公式以及抗折强度与抗压强度之间的线性关系。
Sintered ndfeb has excellent magnetic properties with low price while the strength and toughness are poor which result in poor machinability , and it is easy to be broken . so they can not be used in areas with impact 但是,这种材料强度和韧性差,机械加工困难,应用过程中容易掉角开裂,特别是在一些有冲击振动载荷的领域应用受到限制。
The load of the foundation of pile - cap related with not oniy the load of upper structure , the strength of material , the style of structure , the rigidity of pile etc . , but also the variable soil , as forms a cornplex system 桩基承台的受力不仅与上部结构荷载、材料强度、结构形式、基桩的刚度等因素有关，而且受千变万化的地基土质的制约，形成了一个非常复杂的体系。
Contradiction and unity relation in concrete structural design is put forward in the paper , including safety of structure and economy ; strength of material and deformation ; concrete protective coating and safety durability 摘要通过对混凝土结构设计规范的理解，提出了结构安全与经济、材料强度与变形、混凝土保护层与结构安全性、耐久性等因素的对立统一关系对结构设计的影响。
Aiming at the factors affecting the strength of paste filling material , the relation between affecting factors and strength of paste filling material is revealed on the basis of a lot of experiments in the lab , in which the river sand was used as skeletal material 摘要针对影响膏体充填材料强度的因素，通过大量的试验，揭示了以河砂为骨料的膏体充填材料强度与各影响因素间的关系。
