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The Sea-Wing7000 underwater glider, developed by the Shenyang Institute of Automation, CAS, is an instrument platform designed to glide to depths of 7000 meters for the application of deep-sea environment variables observation. Similar in structural layout to the “Sea-Wing” glider[1], to achieve these depths, The “Sea-Wing7000” using composite of carbon fiber / resin as the pressure hull. A “Sea-Wing7000”...
In order to improve the stability of SPMIG welding process, this paper fully utilized the characteristics that sine wave was the low-frequency modulation signal as well as the sine wave function was derivable for any order to make the energy change dE/dt smooth, thus improving the welding stability and welding joint performance. The tests for the SPMIG and DPMIG welding of AA6061 aluminium alloy were...
We proposed a hybrid powered ankle exoskeleton. It can be able to supply positive mechanical power to the user during the swing phase of gait. The hybrid powered ankle exoskeleton was composed of a pair of compressed springs and a cable-driven actuator fasted to the shin. It was lightweight, and permitted the cable-driven actuator to provide the forces at the biological level to the ankle joint. Meanwhile...
In order to design and manufacture the demonstration equipment for an automatic control theory, we focus on the strength of a MAX channels made of the aluminum alloy in expansion kit TETRIX of LEGO MindStorms. The tensile test and bending test were carried out to investigate the mechanical properties of the MAX channel and, notice on the design of the MAX channel subjected to combined load of bending...
The article considers the some features of the screw-threading process in the holes of tiny and the ultra-small diameter (d <1.4 mm). The influence of diameter size on the regularities of machining and chip formation determines the reasons for the low reliability of machining and the ways to increase it.
Nowadays, diving is done for a variety of purposes. One type of diving activity is scuba diving. In the process, time and scuba diving area are limited by the availability of gas for breathing. This research focused on the design of single passenger underwater vehicle frame. Frame is a major component of the underwater vehicle functioning as a holder of the load and a place to put all the components...
Because of difficulties such as special tool design, fixture design and welding method, for welding T-joint in conventional friction stir welding (FSW). For solving these problems, in this paper adopt a new method, which a tool pin penetrated through the skin and it reached the stinger. By adopting this method, a single tool, single pass welding procedure will produce a sound joint. The heat-affected...
Cold expansion and interference fitting both can improve the fatigue life of 7075-T6 aluminum alloy single plates. To study the combination effect of the two techniques on fatigue life improvement, a numerical analysis method was employed to simulate the specimens with different cold expansion and interference fit degrees. Finite element methods were conducted to capture the residual stress, and the...
The effects of configuration and fiber orientation on the performance of fiber metal laminates (FMLs) subjected to low velocity impact has been investigated. A finite element model has been firstly validated credible, and then it was adopted to simulate the impact response of other four types of FMLs with some differences in configuration or fiber layup orientation to compare with the experimental...
In this paper, we focus on the strength of a flat bar made of the aluminum alloy in expansion kit TETRIX of LEGO MindStorms, in order to design and manufacture a demonstration equipment for an automatic control theory. The tensile and bending tests were carried out to investigate the mechanical properties of the flat bar. And, the strength design of the demonstration equipment was discussed when the...
Computer simulation of the expanding internal pressure was performed for pipes made of steel and aluminum alloy and having uneven wall thickness. For this simulation the software tool ESI Virtual-Performance 2016.0 was used that implements the finite element method. The convergence and accuracy of the solution were estimated by comparison with known solutions. A full factorial computational experiment...
A K-means clustering RBF neural network modeling method is introduced in this paper, this model is for infrared target spectral emissivity estimation. Part of the transmission of infrared radiation in the atmosphere is absorbed by the atmosphere, the use of RBF neural network measurement samples for analysis and learning. An infrared energy model of 3–14 μ m was established to estimate the spectral...
The purpose of this research indicates the experimental results of the Metal Inert Gas (MIG) welding process of butt joint between A5052 alloys and SS400 steel using ER4043 filler metal. The mechanical properties of the joints were investigate. The results of the analysis shows that the intermetallic compound layer appeared at interface between steel and welding seam with their width increasing from...
The corrosion behavior of the anodized Al alloys in the electrolytes containing different metal ion has been investigated. The galvanic corrosion current of anodized AA6061 aluminum plate and C2800 brass plate couples was measured using a zero resistance ammeter for 8 hours in solution containing 3000ppm of copper sulfate. The corrosion current of AA6061-T6 specimen was 8.9 × 10−7 A/cm2 and 3.1 ×...
In this investigation Zr-based (Zr51Cu31Al3Ni5) and Ti-based (Ti40Zr10Cu8Nb7Co7) thin-film metallic glass (TFMG), in different thickness, were used to improve the tribological properties of 7075 aluminum alloy substrates with different surface patter. Wear tests were performed in refrigerator oil to evaluate the effect of thin film adhesion strength and surface pattern on the wear resistance. A scanning...
Aiming at solving the problem of shrinkage in complex squeeze casting, Aluminum Alloy gearbox was taken as the research object, and the numerical simulation was done with the professional casting analysis software ProCAST. The characteristics of casting structure were analyzed, and the possible defects of casting solidification were predicted and analyzed. The results show that under the casting temperature...
External bonding of steel, fiber reinforced polymers (FRP) and other materials has proven its reliability and effectiveness in strengthening deteriorated reinforced concrete (RC) structures. However, due to some shortcomings of these conventional materials, researchers are seeking new strengthening materials. This paper explores the use of Aluminum Alloy (AA) plates as a newly strengthening material...
Research data of accelerometer noise parameters were used to calculate possible resolution. The layout scheme has been developed for design creation. Engineering calculations allow evaluating the reliability and the ability for MEMS inclinometer operation under external influencing factors. Protection technology has been developed to ensure reliable inclinometer operation from external influencing...
The intelligent welding technology is one of key development directions in “Industry 4.0” systems, and the use of sensing method is the main research direction of future intelligent welding technology. Due to the characteristics of aluminum alloy variable polarity plasma arc welding, by employing a complementary metal oxide semiconductor welding camera with a composite filter glass, a clear image...
We developed 6,000 m class cylindrical pressure-tight housings using ceramic cylinders and metal caps. The housings have a simple structure, comprising ceramic cylinders, aluminum alloy caps, and couplings between the ceramic cylinders. They are considerably lighter than metal housings. We applied nonlinear finite element analysis (FEA) to evaluate the stress distribution. Results show no stress exceeding...
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