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Full-Text Articles in Social and Behavioral Sciences
Numerical Study On Springback With Size Effect In Micro V-Bending, Zhi Fang, Haina Lu, Dongbin Wei, Zhengyi Jiang, Xianming Zhao, Di Wu
Numerical Study On Springback With Size Effect In Micro V-Bending, Zhi Fang, Haina Lu, Dongbin Wei, Zhengyi Jiang, Xianming Zhao, Di Wu
Faculty of Engineering and Information Sciences - Papers: Part A
With the development of microforming technology, the demand on accuracy of the metallic micro components is elevating. While springback phenomenon which is inevitable during bending process, can cause unpredicted dimensional error, bringing difficulties to the downstream assembly, and let alone the springback in microforming as the measurements of tools and workpieces downsize hundreds even thousands times. This paper focuses on the springback effect that occurs after the micro Vbending a classic processing method to manufacture microparts. Numerical simulation has been conducted to investigate the size effect in terms of Voronoi tessellation and springback. A finite element (FE) model of the …
Numerical Analysis Of High-Strength Concrete-Filled Steel Tubular Slender Beam-Columns Under Cyclic Loading, Vipulkumar Patel, Qing Quan Liang, Muhammad N. S Hadi
Numerical Analysis Of High-Strength Concrete-Filled Steel Tubular Slender Beam-Columns Under Cyclic Loading, Vipulkumar Patel, Qing Quan Liang, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
The effects of cyclic local buckling on the behavior of concrete-filled steel tubular (CFST) slender beam-columns under cyclic loading were approximately considered in existing analytical methods by modifying the stress– strain curve for the steel tube in compression. These methods, however, cannot simulate the progressive cyclic local buckling of the steel tubes. This paper presents a new efficient numerical model for predicting the cyclic performance of high strength rectangular CFST slender beam-columns accounting for the effects of progressive cyclic local buckling of steel tube walls under stress gradients. Uniaxial cyclic constitutive laws for the concrete core and steel tubes are …
Numerical Analysis Of Spiral Roller Of Chain-Die Former, Shenglan Zhu, Yong Sun, Shichao Ding
Numerical Analysis Of Spiral Roller Of Chain-Die Former, Shenglan Zhu, Yong Sun, Shichao Ding
Faculty of Engineering and Information Sciences - Papers: Part A
Chain-die Forming is a novel sheet metal forming technology developed recently. It effectively minimizes the redundant deformation during forming in order to reduce residual stresses to very small values even to zero in product, which is impossible to be achieved through conventional roll forming. Better quality of products therefore can be expected with the development of this new technology. This article is to use FEM to analyze the stresses developed in the spiral roller which is one of the key elements in a Chain-die former. In order to optimize the design of Chain-die former, the results of equivalent stress have …
Numerical Modeling Of Size Effect In Micro Hydromechanical Deep Drawing, Hideki Sato, Ken-Ichi Manabe, Dongbin Wei, Zhengyi Jiang
Numerical Modeling Of Size Effect In Micro Hydromechanical Deep Drawing, Hideki Sato, Ken-Ichi Manabe, Dongbin Wei, Zhengyi Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
A modeling of tribological size effects in micro deep drawing (MDD) and micro hydromechanical deep drawing (MHDD) is a main focus in this study. The inner and outer pockets in which the different friction coefficients can be applied at different lubrication conditions are considered on the blank surface. The ratio of the area of outer pockets to inner pockets is changed with the decrease in the size. The low friction coefficient at the outer pockets is assumed in MHDD by considering the lubrication effect of fluid medium. The numerical analysis is performed under six lubrication conditions. The analytical results of …