No abstract

Converting CO2 into value-added chemicals over efficient and recyclable catalysts has attracted increasing attention. Covalent organic frameworks (COFs) have arisen as elegant heterogeneous catalysts for this subject. Herein, we report...

Firstly, the wear between the lock ring and hook of a retractable undercarriagedoor lock machine under the action of the periodic load has been discussed. Secondly, the calculations based on the Acrhard model has been established to confirm the incremental wear gap in a given time. Thirdly, the analysis and calculation model of the wear reliability were given when the size parameters, load, material properties and permissible wear distribute randomly. Finally, agree with the experimental data, the calculations and the analysis of the reliability prove that the model established in the paper is appropriate and practical.

Firstly, this paper conducted the failure modes and effects analysis (FMEA) for the certain hydraulic system; secondly, it calculated the impact load of the hydraulic system when it works; and based on above results of FMEA and the calculation of impact load, it has made the finite element analysis to key components in Abaqus which caused most failures. Finally, it optimized the design of the sealing gasket according to the results of finite element analysis.