Sixth Drawing Process Analysis for Electrodeposited Nickel Coating Battery Shells

2010 ◽  
Vol 37-38 ◽  
pp. 1206-1209
Author(s):  
Li Qun Zhou ◽  
Xia Chun Huang ◽  
Cai Ming Fu
Keyword(s):  
Strain Field ◽  
Deformation Process ◽  
Nickel Coating ◽  
Process Analysis ◽  
Drawing Process ◽  
Shell Elements ◽  
Hardening Model ◽  
Electrodeposited Nickel ◽  
Work Hardening Model ◽  
Coated Sheet

A finite element method is used to simulate the sixth drawing process of nickel coating battery shells. The material’s mechanical parameters are tested and shown and the forming tool parameters are given. The Belytschko-Wong-Chiang shell elements are used and the kinematical work hardening model is adopted for the sheets. The stress-strain field in the components in the forming processes is obtained. The nickel coating yielded at the drawing process, the effective plastic strain reached 0.3769-0.7524. The coated sheet does not delaminate in the bonding interface during the deformation process. This study can aid the production of coating battery shells.

Drawing Process Analysis for Electrodeposited Nickel Coating by Finite Element Method

2011 ◽  
Vol 291-294 ◽  
pp. 606-609
Author(s):  
Li Qun Zhou ◽  
Yu Ping Li ◽  
Cai Ming Fu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Nickel Coating ◽  
Process Analysis ◽  
Steel Substrate ◽  
Effective Strain ◽  
Drawing Process ◽  
Interfacial Stresses ◽  
Shell Elements ◽  
Element Method

A finite element method is used to simulate the deep drawing processes of nickel coating with steel substrate into battery shells. The Belytschko-Wong-Chiang shell elements are used and the kinematical work hardening model is adopted, while the ties with failure contact criterion is given to the coating and substrate interface. The stress-strain field and interfacial stresses in the drawing processes are obtained. The nickel coating appeared to be yielded in the drawing processes, of which the maximum effective stress reached 241MPa, and the biggest effective strain reached 0.7524. The interfacial stresses in the coating and substrate varied during the drawing process, and their maximal values reached 40MPa in compressive state.

Numerical Analysis of Electrodeposited Nickel Coating in Multistage Drawing Processes

2005 ◽  
Vol 127 (2) ◽  
pp. 233-243 ◽  
Author(s):  
L. Q. Zhou ◽  
Y. P. Li ◽  
Y. C. Zhou
Keyword(s):  
Finite Element ◽  
Nickel Coating ◽  
Steel Substrate ◽  
Shell Element ◽  
Thickness Variation ◽  
Central Difference ◽  
Elastic Plastic ◽  
Central Difference Method ◽  
Electrodeposited Nickel ◽  
Work Hardening Model

The elastic-plastic finite element method of a dynamic explicit algorithm was used to simulate the deep drawing processes of nickel coating electrodeposited on a steel substrate to form an advanced battery shell. The Belytschko-Wong-Chiang shell element was used to mesh the materials, the kinematical work-hardening model was adopted for the components, and the tied-with-failure contact criterion was given to the interfacial combination. The rate-type elastic-plastic constitute law was employed to handle the large deformation, and the central difference method was utilized to solve the finite element equations. The simulations of the materials in the first and final processes illustrated that the steel substrate and the nickel coating were simultaneously deformed and yielded in the die fillet profile and the flange area. The thickness variation of the nickel coating and steel substrate was dependent on the main principal stress, and their variation rule was consistent. In the entire drawing processes, the thinnest region after forming was at the lower part of the cup near the cup bottom, the extent of the coating being thinned after drawing was acceptable, and the material was capable of forming the battery shell. The simulated results were partly compared with tests and other analysis and showed good agreement.

Finite Element Modeling of Deep Drawing of Coated Sheet

2012 ◽  
Vol 430-432 ◽  
pp. 1302-1305
Author(s):  
Xiao Bing Zhang
Keyword(s):  
Deep Drawing ◽  
Metal Forming ◽  
Nickel Coating ◽  
Drawing Process ◽  
Nose Radius ◽  
Danger Zone ◽  
Friction Coefficients ◽  
Deep Drawing Process ◽  
Substrate Steel ◽  
Coated Sheet

The deep drawing process is one of the important sheet-metal forming processes. Using this operation, many parts are manufactured in various industries. With this regard, the numerical simulations of a kind of coated sheet deep-drawing process were conducted using LS-DYNA in this paper. The model takes into account the coating/substrate composite may delaminate or crack during drawing, the combination of coating and substrate was defined as tied with failure contact. The results of the simulations revealed that the substrate (steel sheet) and the nickel coating did not delaminate at the interface. Furthermore, it was found that the punch-nose radius is the danger zone for the break and at this zone, the thickness of the coating was thinner than the substrate, some experiments were done to validate the simulated results. At last, the influences of friction coefficients were analyzed and the result that greater friction coefficients will lead to increase the tendency of crack was attained.

A work-hardening model of the lower yield strength of discontinuously yielding alloys: Ni3Al and mild steel

1989 ◽  
Vol 4 (3) ◽  
pp. 470-472 ◽  
Author(s):  
E. M. Schulson
Keyword(s):  
Grain Size ◽  
Yield Strength ◽  
Mild Steel ◽  
Work Hardening ◽  
Lower Yield ◽  
Hardening Model ◽  
Lower Yield Strength ◽  
Work Hardening Model ◽  
Lüders Bands

The lower yield strengths of Ni3Al and mild steel and their respective relationships to (grain size)−0.8 and (grain size)−0.5 are explained in terms of work hardening within Lüders bands.

Electrodeposited Nickel Coating Reinforced with Chlorophyll‐Reduced Graphene Oxide

2021 ◽  
Author(s):  
Saptarshi Das ◽  
Swastika Banthia ◽  
Jhimli Sarkar Manna ◽  
Debajyoti Palai ◽  
Srijan Sengupta
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nickel Coating ◽  
Reduced Graphene ◽  
Electrodeposited Nickel

Modelling the Recrystallization Behaviour during Industrial Processing of Aluminium Alloys

2012 ◽  
Vol 715-716 ◽  
pp. 543-548 ◽  
Author(s):  
Knut Marthinsen ◽  
Jesper Friis ◽  
Bjørn Holmedal ◽  
Inge Skauvik ◽  
Trond Furu
Keyword(s):  
Dislocation Density ◽  
Aluminium Alloys ◽  
Alloy Composition ◽  
Subgrain Size ◽  
Composition Profile ◽  
Hardening Model ◽  
Subsequent Recovery ◽  
Industrial Processing ◽  
Work Hardening Model ◽  
Particle Paths

The microstructure evolution in commercial AlMgSi alloys during and after extrusion of a simple U-shaped profile has been modelled. The strain, strain rate and temperature along a set of particle paths are taken from FE-HyperXtrude simulations and used as input to the work hardening model ALFLOW, to predict the evolution of the subgrain size and dislocation density during deformation. As soon as the profile leaves the die, the subsequent recovery and recrystallization behaviour is modelled with the softening model ALSOFT. This procedure enables the modelling of recrystallization profiles, i.e. the fraction recrystallized through the wall thickness of the extruded profile. The sensitivity to chemistry (alloy composition), profile deflection and the cooling rate at the die exit has been investigated by means of a set of generic modelling cases.

Tribological Properties of Ni/Cu Multilayers

2007 ◽  
Vol 561-565 ◽  
pp. 2451-2454 ◽  
Author(s):  
Tomoya Hattori ◽  
Yoshihisa Kaneko ◽  
Satoshi Hashimoto
Keyword(s):  
Layer Thickness ◽  
Sliding Wear ◽  
Nickel Coating ◽  
Copper Substrate ◽  
Total Thickness ◽  
Individual Layer ◽  
Hardness Tests ◽  
Plastic Deformation Process ◽  
Electrodeposited Nickel ◽  
20 Nm

Sliding wear and hardness tests in Ni/Cu multilayers electrodeposited on polycrystalline copper substrate were carried out. The multilayers had a total thickness of 5 μm and an individual layer thickness from 5 to 100 nm. Hardness of the multilayers measured with a nanoindentation tester was found to be dependent on layer thickness. The multilayer with the layer thickness of 20 nm showed the highest value among them. It was found that the wear resistances of all the multilayers tested were higher than that of an electrodeposited nickel coating. It was also revealed that the specific wear rate of multilayers decreased with decreasing the layer thickness although the highest hardness was attained at the 20 nm layer thickness. Scanning ion microscope observation showed that the subsurface area kept the layered structure of nickel and copper even after sliding wear. The multilayer had plasticity sufficient to accommodate deformation coming from the sliding wear, because fine grains peculiar to severe plastic deformation process were formed near the worm surface.

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