scholarly journals Numerical and Experimental Analysis of Hardening Distortions of Drawpieces Produced in Hot Stamping Process

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 457
Author(s):  
Ireneusz Wróbel
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Experimental Analysis ◽  
Hot Stamping ◽  
Experimental Studies ◽  
Industrial Experience ◽  
Compensation Process ◽  
Stamping Process

The paper presents the results of a numerical simulation of the distortions in drawpieces, generated during the production of the drawpieces using the hot stamping method. A division of the distortions is proposed depending on their shape and based on the industrial experience of the author of this publication, i.e., concerning flexure and torsion (skewing). Numerical simulations of the hot stamping process were performed for the representative drawpieces, in which the hardening distortions can be assigned to the above specified forms. A numerical compensation of the hardening distortions was proposed to obtain, after the compensation process, a drawpiece complying with the requirements concerning shape and dimensional tolerances. The results of the simulations have been confirmed in the course of the experimental studies. Conclusions and recommendations for the analysis of the process were also elaborated.

Effect of Dies Temperature on Mechanical Properties of Hot Stamping Square-Cup Part for Ultra High Strength Steel

2010 ◽  
Vol 129-131 ◽  
pp. 390-394
Author(s):  
Cheng Xi Lei ◽  
Zhong Wen Xing ◽  
Hong Ya Fu
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Hot Stamping ◽  
High Strength ◽  
Hot Forming ◽  
Forming Process ◽  
Stamping Process ◽  
Ultra High Strength Steel ◽  
Mechanical Properties Testing ◽  
Simulation Results

The numerical simulation of hot-stamping process was carried out for UHSS square-cup parts, and the influence of dies temperature on the hot-stamping process was anlysised. Besides, through the microstructure analysis and mechanical properties testing of the formed parts, effects of dies temperature on microstructures and mechanical properties of hot-stamping square-cup parts were obtained. The experiment and simulation results showed that the mechanical properties of the UHSS are strongly dependent on the temperature, so the dies temperature is one of the most important parameters that have to be taken into account in designing the hot-forming dies and the hot-forming process.

Sensitivity analysis and optimization of hot-stamping process of automotive components using analysis of variance and Taguchi technique

2016 ◽  
Vol 231 (4) ◽  
pp. 732-746 ◽  
Author(s):  
Abolfazl Khalkhali ◽  
Hadiseh Noraie ◽  
Morteza Sarmadi
Keyword(s):  
Numerical Simulation ◽  
Analysis Of Variance ◽  
Hot Stamping ◽  
High Strength ◽  
Vehicle Body ◽  
Design Parameters ◽  
Objective Functions ◽  
Similar Work ◽  
Stamping Process ◽  
Safety Considerations

Nowadays, the demand for achieving cars with higher strength, lower fuel consumption, and better safety considerations propels automakers to produce parts with extremely high strength-to-weight ratios. This criterion is done through the hot-stamping process considered as a novel technology employed for producing high-strength steel parts with low springback, particularly appropriate for the vehicle body. In this paper, firstly, numerical simulation of the hot-stamping process of a blank consisted of boron-alloyed steel 22MnB5 (with commercial name of Usibor 1500) is performed. Secondly, effects of different design parameters including blank holder force, die radius, gap between the punch and die, and forming time on the final temperature distributions as well as springback of the part is investigated. Consequently, optimization has been performed using Taguchi L16 orthogonal array to obtain the parameters which minimize above-mentioned parameters as two objective functions. Obtained results are verified based on performing numerical simulation and comparison to a similar work in the literature. Accuracy of the results is also assessed via the technique of plotting normal probability graphs of both objective functions. Finally, via evaluation of contribution percentage associated with analysis of variance considering each design parameter, a discussion is done by proposing the optimum design.

Applications of Multi-Scale Models to Numerical Simulation and Experimental Analysis of Anisotropic Elastoplastic Behavior of Metallic Sheets

2014 ◽  
Vol 611-612 ◽  
pp. 536-544 ◽  
Author(s):  
Walid Nasri ◽  
Adinel Gavrus ◽  
Afia Kouadri-David ◽  
Kacem Sai
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Experimental Analysis ◽  
Tension Test ◽  
Thin Sheets ◽  
Elastoplastic Behavior ◽  
Multi Scale ◽  
Drawing Test ◽  
Scale Models ◽  
Deep Drawing Test

In this paper anisotropic mechanical behavior of AA2024 aluminum and Ti6Al4V titanium alloys were studied using three different approaches: unified, multi-mechanism and polycrystalline. The theoretical formulations of studied elastoplastic models are first described. Thereafter, some numerical results concerning the simulation of a uniaxial tension test applied to thin metallic sheets are presented. Comparison between experimental results (taken from the literature) and numerical simulations shows that the multi-mechanism and polycrystalline models describe slightly better the anisotropy when considering all the directions. Finally, numerical simulations of a deep drawing test of AA2024 aluminum thin sheets will be analyzed.

scholarly journals Thermomechanical-Phase Transformation Simulation of High-Strength Steel in Hot Stamping

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Wenhua Wu ◽  
Ping Hu ◽  
Guozhe Shen
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Phase Transformation ◽  
High Strength Steel ◽  
Hot Stamping ◽  
Constitutive Models ◽  
High Strength ◽  
Simulation Software ◽  
Transmission Model ◽  
Stamping Process

The thermomechanical-phase transformation coupled relationship of high-strength steel has important significance in forming the mechanism and numerical simulation of hot stamping. In this study a new numerical simulation module of hot stamping is proposed, which considers thermomechanical-transformation multifield coupled nonlinear and large deformation analysis. In terms of the general shell finite element and 3D tetrahedral finite element analysis methods related to temperature, a coupled heat transmission model for contact interfaces between blank and tools is proposed. Meanwhile, during the hot stamping process, the phase transformation latent heat is introduced into the analysis of temperature field. Next the thermomechanical-transformation coupled constitutive models of the hot stamping are considered. Static explicit finite element formulae are adopted and implemented to perform the full numerical simulations of the hot stamping process. The hot stamping process of typical U-shaped and B-pillar steel is simulated using the KMAS software, and a strong agreement comparison between temperature, equivalent stress, and fraction of martensite simulation and experimental results indicates the validity and efficiency of the hot stamping multifield coupled constitutive models and numerical simulation software KMAS. The temperature simulated results also provide the basic guide for the optimization designs of cooling channels in tools.

Coupled numerical simulation of hot stamping process and experimental verification

2013 ◽  
Author(s):  
Ye Li ◽  
Liang Ying ◽  
Ping Hu ◽  
Dongyong Shi ◽  
Xi Zhao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Verification ◽  
Hot Stamping ◽  
Stamping Process

scholarly journals An Approach to Determine Optimal Bow Configuration of Polar Ships under Combined Ice and Calm-Water Conditions

2021 ◽  
Vol 9 (6) ◽  
pp. 680
Author(s):  
Hui Li ◽  
Yan Feng ◽  
Muk Chen Ong ◽  
Xin Zhao ◽  
Li Zhou
Keyword(s):  
Numerical Simulation ◽  
Water Resistance ◽  
Numerical Technique ◽  
Experimental Studies ◽  
Resistance Index ◽  
Simulation Method ◽  
Present Approach ◽  
Calm Water ◽  
Level Ice ◽  
Ice Resistance

Selecting an optimal bow configuration is critical to the preliminary design of polar ships. This paper proposes an approach to determine the optimal bow of polar ships based on present numerical simulation and available published experimental studies. Unlike conventional methods, the present approach integrates both ice resistance and calm-water resistance with the navigating time. A numerical simulation method of an icebreaking vessel going straight ahead in level ice is developed using SPH (smoothed particle hydrodynamics) numerical technique of LS-DYNA. The present numerical results for the ice resistance in level ice are in satisfactory agreement with the available published experimental data. The bow configurations with superior icebreaking capability are obtained by analyzing the sensitivities due to the buttock angle γ, the frame angle β and the waterline angle α. The calm-water resistance is calculated using FVM (finite volume method). Finally, an overall resistance index devised from the ship resistance in ice/water weighted by their corresponding weighted navigation time is proposed. The present approach can be used for evaluating the integrated resistance performance of the polar ships operating in both a water route and ice route.

Study on Microstructure and Numerical Simulation of Tailored Hot Stamping Tools Refabricated by Surfacing Co-Based Alloy

2021 ◽  
Vol 30 (4) ◽  
pp. 2732-2741
Author(s):  
Shixin Peng ◽  
Jie Zhou ◽  
Qiuyun Wang ◽  
Mengmeng Zhang ◽  
Qian Shu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Hot Stamping
Sign in / Sign up

Export Citation Format

Share Document