某型飞机舱盖手动开启机构活塞杆橡胶面开裂失效分析

本文主要对故障活塞杆和配合密封的活门座子进行了外观检查,对活塞杆橡胶面表面以及橡胶断裂断口进行了宏观、微观观察,对活塞杆使用的橡胶进行了红外光谱等分析。综合各个实验结果,确定活塞杆橡胶面裂口起源于活塞杆与橡胶结合的内圆周处,开裂的原因为过载开裂。

空调贯流风叶的运转可靠性研究

针对空调使用一段时间后出现贯流风叶脱落的问题,本文从外观破损情况、橡胶件灰分测试、环境腐蚀验证和不同橡胶材料耐候方面进行分析,通过研究非金属材料橡胶制品在不同温度、环境、抗老化和耐候方面的长期可靠性,改进选型方案。

Improved Resistance to Cracking of a Cement Mortar through the Incorporation of Crumb Rubber

Within a context of sustainable development, innovative processes for various applications to recycle rubber are put in place to make aggregates or crumb rubber. These uses include sports floor coverings, to manufacture of sealants, sound absorbing walls, to make roads, as an alternative fuel in cement kilns, etc. In this study, the addition of crumb rubber to mortar was investigated through optical and mechanical tests. The results showed that the incorporation of crumb rubber from used tires into mortar produced a better resistance to shrinkage cracking, but a compressive strength/tensile is reduced. This feature could lend itself to making playgrounds and sports grounds more absorbing and flexible, which would allow a more significant fall to be withstood without injury and consequently enhance the safety of playgrounds.

城轨车辆齿轮箱吊杆球关节故障分析及解决方案

针对城轨车辆齿轮箱吊杆球关节橡胶腐蚀、裂纹故障,从设计结构、材料及处理工艺等因素进行了分析。提出了相应的处理方案,有效解决了吊杆球关节故障,在改善车辆运行品质的同时,降低了车辆的运行风险。