In this paper, a novel nano-electrocatalyst (Pt@N-CDs/RGO) with reduced graphene oxide as the carrier and platinum (Pt) and nitrogen-doped carbon quantum dots (N-CDs) together as the active sites was prepared by a sim...
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Due to its excellent performance, three-dimensional composites are an ideal choice for components in the aerospace and automotive fields. However, the need for smooth operation and productivity of current braiding equ...
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Titanium has been wildly used in automobile industry. However, it is recognized as a typical material which is difficult to cut. Therefore, this work aims at the effect of modulation period number on the cutting force...
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The driving conditions encountered by vehicles during operation are complex and varied, and the ECMS (Equivalent fuel Consumption Minimization Strategy) based on minimum equivalent fuel consumption has poor adaptabili...
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The electro-shocking treatment (EST) was a rising method for the strengthening of titanium alloys. This work conducted EST on Ti-8Al-1Mo-1V titanium alloy specimens with the purpose to shed insights on the influence o...
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In order to solve the control problem of the parallel 6-DOF motion platform, a fuzzy controller is designed to self-tune the PID control parameters, and a fuzzy PID controller is formed to control the actuator electri...
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In this work, electroshocking treatment (EST) was applied to Ti-6Al-4V prepared by laser melting deposition (LMD), and the microstructure and grain size were investigated. The size of the α phase was reduced, and the...
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The aeroengine casing ring forgings have complex cross-section shapes,when the conventional ultrasonic or phased array is applied to detect such curved surfaces,the inspection images always have low resolution and eve...
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The aeroengine casing ring forgings have complex cross-section shapes,when the conventional ultrasonic or phased array is applied to detect such curved surfaces,the inspection images always have low resolution and even artifacts due to the distortion of the wave *** this article,taking a type of aeroengine casing ring forging as an example,the Total Focusing Method(TFM)algorithms for curved surfaces are ***,the Acoustic Field Threshold Segmentation(AFTS)algorithm is proposed to reduce background noise and data ***,the Vector Coherence Factor(VCF)is adopted to improve the lateral resolution of the TFM ***,a series of 0.8 mm diameter Side-Drilled Holes(SDHs)are machined below convex and concave surfaces of the *** quantitative comparison of the detection images using the conventional TFM,AFTS-TFM,VCF-TFM,and AFTS-VCF-TFM is implemented in terms of data volume,imaging Signal-to-Noise Ratio(SNR),and defect echo *** results show that compared with conventional TFM,the data volume of AFTS-VCF-TFM algorithm for convex and concave is decreased by 32.39%and 73.40%,***,the average SNR of the AFTS-VCF-TFM is gained up to 40.0 dB,while the average 6 dB-drop echo width of defects is reduced to 0.74 mm.
Fiber metal laminates (FMLs) are a kind of composite material prepared by alternately arranging fiber layers and metal sheets at a certain temperature and pressure. It has been widely used in aerospace and automobile ...
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Conical rings with thin sterna and high ribs(CRTSHR)are key bearing-load parts of aerospace equipment,which are required to be manufactured with high performance and *** ring rolling is the most preferred method for m...
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Conical rings with thin sterna and high ribs(CRTSHR)are key bearing-load parts of aerospace equipment,which are required to be manufactured with high performance and *** ring rolling is the most preferred method for manufacturing high-performance ring parts,but it can hardly achieve the forming of CRTSHR due to the extreme geometry of *** solve this difficulty,an innovative constraining ring rolling process(CRR)is proposed in this paper to manufacture *** evaluate the proposed CRR and reveal its deformation behaviors,a thermomechanical coupled FE model for CRR of CRTSHR is ***,the experiment for CRR of CRTSHR is performed on a modified ring rolling machine,which proves that CRR of CRTSHR is feasible and the established FE model is *** on the reliable FE model,the metal flow mode in deformed CRTSHR is analyzed,and the deformation characteristics such as the stress state,strain distribution and the evolution of power parameters in CRR of CRTSHR are ***,the influences of key parameters such as the friction factor between ring and molds,the diameter of idle roll and the feed velocity of idle roll on CRR of CRTSHR are investigated by FE simulation.
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