Authors: Xia Chun Huang, Han Yu Wang, Li Qun Zhou
Abstract: In this paper, ABAQUS was used to simulate the stamping process for electrodeposited nickel coating. In the simulation, a built-in cohesive zone model of ABAQUS was used to present electrodeposited nickel coating steel‘s interface performance. The computational results shows that, at the interface, the normal stress was between -113.765～3MPa，and the maximum tangential stress is 50 MPa. The maximum interface stress is at the die fillet during the process of stamping，and we analyze the case of delaminating and is used to assess the influence of the blank holder force，the clearance between the punch and the die and the tool radii. This method can be used as guidance for battery shell’s forming manufacture.
143
Authors: He Hui Wang, Shao Jie Zhang, Yao Gang Wang, Kai Shu Guan
Abstract: This paper describes an approach to identify the influence of mechanical properties of the materials under the condition of containing residual stress. The numerical method of simulating small punch test (SPT) is used to determine the material response under loading. The simulated material behavior of the specimen is based on the ductile elastoplastic damage theory of Gurson, Tvergaard and Needleman (GTN). The residual stress can be prefabricated on the specimen by loading and unloading. By comparing the original specimen with the specimen contains residual stress, the change of the mechanical properties of the materials can be studied. The results of simulation indicate that the material properties decrease with the increase of the residual stress.
285
Authors: Heng Yun Si, Zhen Hua Liu, Hong Wei Guo, Tao Wang
Abstract: Steel silos lack of systematic theoretical research. Based on a large floor-ash steel silo, for example, in view of a large number of documents based on the relevant specifications, the temperature load of steel silo effect is analyzed. The results show that: for those steel silos which are constructed in a larger temperature difference between regions, warehouse wall stress induced by the temperature load can not be ignored; at the bottom of the storehouse, the hoop stress, vertical stress load vary linearly with temperature, therefore, when the temperature difference is large, the temperature stress at the bottom of the warehouse is much larger than the warehouse wall stress induced by the storing load; the temperature stress at the bottom of the steel silos changes in shape of a parabola according to the silo diameter and the warehouse wall thickness. Therefore, in a certain range, reducing the diameter of the silo but increasing the thickness of the steel silo warehouse is harmful to the steel cylinder.
1285
Authors: Wahyu Dwi Lestari, F.H. Priyoga, J. Jamari, A.P. Bayuseno
Abstract: The reduced wear rate of hip-joint bearing components is the main issues in biotribology researches for the biomedical implants. Ultra-high molecular weight polyethylene (UHMWPE) is extensively used as a bearing material because of having its great properties of friction and wear. Surface texturing can be selected as a method of enhancing tribology properties of engineering surfaces. In this present study, surface texturing examination was performed by 3D finite element method under influence of normal load. Stress distribution of UHMWPE surface under the influence of texturing with the variation in diameter cavities and separation was investigated. The result showed that the surface texturing provided the higher stress distribution of the lower separation in the cylindrical cavities.
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