Papers by Author: Yi Ming Xu

Abstract: The main purpose of this research is to find a solution for the coating/substrate of the wheel-slide which is the key component of civil aircraft flaps and slats, firstly, the simulation test is designed based on wheel-slide’ s working environment. Further, stress analysis of the coating/substrate is researched, and the results are as the input parameters of the finite element model. Then the finite element software, ANSYS, is applied to simulate the contact stress of coating/substrate in wheel-slide, and the stress’s distribution of coating/substrate are analyzed under different load, different coating thickness, different elastic modulus ratio of coating and other parameters. So the stress field characteristics are gained to guide the conduct of modeling experiments. The results can be applied to explore the failure of mechanism coating/substrate system, and provide theoretical guidance to design the coatings.

Abstract: Because mechanism always has the characteristic of high-reliability, long-life and small-sample, performance degradation theory is adopted to study the wear reliability of mechanism. So, firstly the degradation failure standard of mechanism is analyzed; then the distribution of performance parameters is verified by the K-S test; Furthermore, the failure probabilities are calculated based on degradation failure standard and distribution of performance parameters, in order to confirm the wear reliability distribution of mechanism; finally, an example is given to show the validity of this method.