Prediction of stress- and strain-based forming limits of automotive thin sheets by numerical, theoretical and experimental methods

Béres, Gábor; Weltsch, Zoltán; Lukács, Zsolt; Tisza, Miklós

doi:10.1063/1.5035028

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…Use of power type of equation (1) has been criticised by their limitations in covering the full range of plastic strain and that they predict infinite strength [44]. In some cases, the stress–strain curve has been fitted into various segments, each with different values for parameters k and n [45,46]. Figure 6 shows that both types of equations fit with accuracy the experimental data once the Lüders strain has been surpassed.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of advanced high-strength steels obtained by the compact strip production route

Pérez-González

Ramírez-Ramírez

Hernández

et al. 2023

Materials Science and Technology

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Advanced high-strength steels are used in structural components of automobiles to reduce their weight, fuel consumption and green-house gas emissions. Their properties result from tailoring their chemical composition and processing conditions to obtain microstructures consisting of a variety of hard and soft components. This work presents the analyses conducted on steels produced by continuous casting into thin moulds and hot rolling directly to the final shape. The microstructure was studied by microscopical techniques; the phase transformations occurring were assessed with the aid of commercial and dedicated computer programs. The stress–strain curves were fitted to different constitutive equations. It was found that the mechanical characteristics differed due to the strategies in design and production followed by the steelmaker.

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Section: Discussionmentioning

confidence: 99%

Characteristics of advanced high-strength steels obtained by the compact strip production route

Pérez-González

Ramírez-Ramírez

Hernández

et al. 2023

Materials Science and Technology

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“…In this section the material and the FE model building and its validation for DP 600 is presented. Material properties were determined in the following article [6], the used values can be seen in Table 1. According to these values the flow curves can be seen in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

“…where the K and n are material coefficients, the φ is the equivalent plastic strain. [6] The FE simulation model was built in ANSYS WB 18.2 [7]. The geometry of the model was built up in ANSYS Design Modeller as a parametric model.…”

Section: Methodsmentioning

confidence: 99%

Determination of different parameters to high strength steel clinch joints by FEA

Jónás¹,

Tisza²

2019

IJEMS

Self Cite

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In this article the clinched joints were analyzed by finite element method (FEA). The base materials were advanced high strength steels (DP 600, DP 800 and DP 1000). The model validation procedure was done by the DP 600 type of steel sheets; the other two types of steel were only simulated. The goal was to determine the geometrical properties of the joints with different strength steels. The FEA model was the same in every mechanical point of view therefore the results are comparable. The main geometrical parameters of the clinch joints are the neck thickness (tN), the undercut (C), the bottom thickness (tB) and the height of the protrusion (h); these values were compared.

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“…For vibration stress relief, it is necessary to analyse the workpiece, because the frequency of earlier, but also to avoid deformation of the workpiece, as this can significantly reduce the number of terms of time and cost. The primary reason for using VSR is to save time and energy, as mentioned determination method to set the parameters of the resonant VSR to the most efficient one, both in The aim of this research and article is to provide a practical and easy-to-use natural frequency stress-induced and even predictable deformation of automotive thin sheets [15]. martensite volume fraction to deduce to strength properties [14].…”

Section: Describing the Process Of Recording The Acoustic Spectrummentioning

confidence: 99%

Recording acoustic spectrum for residual stress determination and assigning natural frequency ranges for vibration stress relief

Rutscher

Kiri²

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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We have developed a new technique for diagnostics in connection with vibration stress relief. The measurement images developed by us with a unique acoustic spectrum recording are not only suitable for determining the natural frequencies of metal castings, but can also be deduced from them the dislocation in the crystal structure and residual stress, which can cause deformation later. From the changes between the measurement images, the effect of different machining even resting and aging on the casting can be seen. Furthermore, the required input frequency for vibration stress relief can be easily determined from the measured images. Some of the main advantages are the process obtained quickly, easily and immediately. The research will be continued, we are working further development, including the acoustic diagnostic system, the VSR equipment, the recording software with an online platform.

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Prediction of stress- and strain-based forming limits of automotive thin sheets by numerical, theoretical and experimental methods

Cited by 7 publications

References 21 publications

Characteristics of advanced high-strength steels obtained by the compact strip production route

Characteristics of advanced high-strength steels obtained by the compact strip production route

Determination of different parameters to high strength steel clinch joints by FEA

Recording acoustic spectrum for residual stress determination and assigning natural frequency ranges for vibration stress relief

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