Qingdao University of Technology

Northwestern Polytechnical University

Qingdao 5d Intelligent Additive Manufacturing Technology Co., Ltd.

Pengfei Guo

Hongbo Lan

Zuquan Jin

Bin Zhang

Guangming Zhang

Xiaoyang Zhu

Quan Xu

Jiawei Zhao

Xin Lin

Fanxiu Chen

Jianjun Yang

Lin Wu

Yansong Liu

Jiachang Wang

Disclosed are a method for improving a surface quality of an alloy micro-area via a supersaturated film and use thereof. The method includes: adding nickel chloride to a sodium chloride-ethylene glycol electrolyte until the electrolyte is saturated, and conducting electrochemical machining.

Method for improving surface quality of alloy micro-area via supersaturated film and use thereof

A 3D printing device and method for integrated manufacturing of functionally gradient materials and three-dimensional structures. The device includes an active and passive mixing and printing module and a constraining and sacrificial layer printing module. An input end of the active mixing module connects to multiple anti-settling feeding modules, and an output end of the active mixing module connects to the passive mixing and printing module. The passive mixing and printing module and the constraining and sacrificial layer printing module are mounted on one side of an XYZ three-axis module. The constraining and sacrificial layer printing module connects to a constraining and sacrificial layer feeding module and prints and forms a functionally gradient three-dimensional structure. The 3D printing device and method of the invention can realize integrated manufacturing of continuous functionally gradient materials and complex three-dimensional structures, and have the advantages of high printing efficiency and low cost.

3D printing device and method for integrated manufacturing of functionally gradient materials and three-dimensional structures

A method for measuring corrosion-expansion force during cracking of concrete due to corrosion and expansion of reinforcing steel; wherein, deformation on a surface of reinforced concrete is photographed based on a digital image correlation (DIC) method, a full-field displacement and a full-field strain on a surface of the concrete are analyzed and calculated, a relationship between corrosion-expansion force and the strain on the surface of the concrete is found through an established theoretical model, and corrosion-expansion force of reinforcing steel and a change rule of the corrosion-expansion force are calculated. Therefore, the method is simple and includes with safe and reliable operations, scientific principles, and low costs, so that a change in corrosion-expansion force during corrosion and expansion of reinforced concrete can be monitored in real time.

Method for measuring corrosion-expansion force during cracking of concrete due to corrosion and expansion of reinforcing steel

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Qingdao, China

Pengfei Guo