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micro groove copper(MGC) tube. Then the bonding of MGC tube was reached because of intensively plastic deformation of MGC tube under pressure. It is found that the plastic deformation area of the cold welding of MGC tube can be divided into three sections. The deformation of micro grooves in each section was investigated; the influence of the dimensions of cylindrical heads on the weld joint shape......
与气体间非绝热损失的存在使得脉管要达到较高的膨胀效率需采用更大的体积；脉管体积直接影响管壁和管内气体的温度分布,从而影响管壁与气体间的热损失以及气体自身温度不均匀产生的热损失；若对脉管进行一维或绝热假设忽略脉管热损失的影响,则会使脉管尺寸的设计值偏离实际最佳值.关键词:二维；非绝热；脉管体积；脉管效率Pulse tube losses mechanism based on a two...-adiabatic CFD model was proposed to study the relationship between the void volume and expansion efficiency of pulse tube at 80-300 K. The gas physical parameters were analyzed. The results show......
Deformation Mechanism of Hot Spinning of NiTi Shape Memory Alloy Tube Based on FEM江树勇Industrial Training Centre,Harbin Engineering University摘 要:As a successively and locally plastic deformation process, ball spinning is applied to manufacturing thin-walled Nickel-Titanium shape memory alloy (NiTi SMA) tube at high temperature. NiTi SMA tube blank......
J. Cent. South Univ. (2016) 23: 362-369 DOI: 10.1007/s11771-016-3081-5 Optimal design of functionally graded PmPV/CNT nanocomposite cylindrical tube for purpose of torque transmission Abolfazl... mass and high strength. In this work, a cylindrical tube which is made up of functionally graded (FG) PmPV/CNT nanocomposite, is optimally designed for the purpose of torque transmission. The main......
J. Cent. South Univ. (2016) 23: 869-879 DOI: 10.1007/s11771-016-3134-9 Dynamic rupture and crushing of an extruded tube using artificial neural network (ANN) approximation method Javad Marzbanrad1... are usually used in automobile and train structures to absorb the impact energy. Previous researches show that thin-walled circular tube has the highest energy absorption under axial impact amongst......
, it has the trend that the heat transfer coefficient displays worse with increasing the concentration.Key words:nanofluid; heat transfer characteristic; circular tube; metallic particles......
Experiment Study on Self-stress of High-strength, Low-heat and Micro-expansion Concrete-filled Steel Tube卢哲安摘 要:The self-stress trial of the fifteen high-strength, low-heat and micro-expansion concrete-filled steel tube( CFST) is introduced, and the generating and distributing features of pre-stress and its relation to adding quantity of expansive agent......
Crushing Characteristics of Filament Wound Carbon Fiber/Epoxy Tube under Quasi-static Compression Condition朱锦明,LI Wenbin,YANG Guang,贾晓龙,YANG XiaopingState Key Laboratory of Organic-Inorganic...) on crushing characteristics of filament wound CFRP tube under quasi-static compression conditon. It was found that CFRP tubes sequentially showed the brittle fracturing mode, the local buckling......
Effects of Thickness on Mechanical Properties of 2D C/SiC Torque Tube赵晖,ZHANG Litong,CHEN Bo,ZHANG JiaxinScience and Technology on Thermostructure Composite Materials Laboratory, Northwestern... thickness. To characterize the density and porosity of the ceramic matrix composite(CMC) torque tube, a CT test was conducted. The archimedes drainage method was used to measure the density and porosity......
In-Situ Preparation and Thermal Shock Resistance of Mullite-Cordierite Heat Tube Material for Solar Thermal Power徐晓虹,MA Xionghua,WU Jianfeng,CHEN Ling,XU Tao,ZHANG MengqiSchool of Materials Science and Engineering, Wuhan University of Technology摘 要:In order to improve the thermal shock resistance of solar thermal heat transfer tube material, the mullite......
