Videoextensometric measuring of deformation processes in automotive steel sheets at two strain rate levels

Mihaliková, Mária; Ambriško, Ľubomír; Pešek, Ladislav

doi:10.4149/km_2011_2_137

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…The methods of calculating and measuring the deformation and the stress were described in several publications by other authors [2][3][4][15][16][17][18][19][20][21][22][23][24][25][26]. Test specimens with dimensions of 130 × 130 mm 2 and with diameter of 80 mm were used for the bulge test.…”

Section: Materials and Methods For Experimental Researchmentioning

confidence: 99%

Research into Plastic Deformation of Double Reduced Sheets

Spišák

Majerníková

Spišáková

et al. 2018

Metals

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This contribution focuses on examining properties of thin steel sheets, which have been used to produce packages. Thin steel sheets for producing packages have been created with a different method (considering their thickness) than other thin steel sheets, such as sheets for the automobile industry. Steel sheets thinner than circa 0.18 mm are produced with a simple rolling and followed by annealing. Annealing can be completed through a batch process or a continuous process. Steel sheets with a thickness less than 0.13 mm are produced using a second reduction. Taking into account the considerably different strength and plastic properties of the sheets produced with simple rolling and the sheets produced with a second reduction, two types of materials are evaluated and analyzed in this contribution. Examined materials have been produced with different methods: The first material was continuously annealed after being rolled; the second was deformed using a second reduction without any subsequent annealing. Both used materials possess different final properties. The research focused on evaluation of the strength and plastic properties of the packaging sheets during various stress-strain states (uniaxial tensile test and biaxial tensile test-bulge test). The analysis also focused on the factors that led to a lack of inhomogeneity in the plastic deformation, mainly during the uniaxial tensile test causing the localization of the plastic deformation.

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Section: Materials and Methods For Experimental Researchmentioning

confidence: 99%

Research into Plastic Deformation of Double Reduced Sheets

Spišák

Majerníková

Spišáková

et al. 2018

Metals

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“…The dynamic tests were performed according to ISO 26203-1 and ISO 26203-2 standards on the rotary hammer RSO 13,14 with the data evaluated using the Scope 4 program. Figures 2 and 3 show the effect of strain rate on yield stress and ultimate tensile strength of IF and S420 steels sheets.…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Static and dynamic tensile characteristics of S420 and IF steel sheets

Mihaliková¹,

Girman²,

Líšková³

2016

Mater. Tehnol.

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Two automotive steels were investigated; the Interstitial Free Steel (IF) HSLA (High Strength Low Alloy) and the S420 micro-alloyed steel. The properties of these materials were determined by static 10 -3 s -1 and dynamic 10 3 s -1 rate stress experiments. The plastic properties were determined after static and dynamic tests. The aim of examination of substructures was to determine the distribution of dislocations for various types of stress. The hardness of all the tested materials was higher at a slow rate of deformation. The greater strain hardening of the materials was confirmed by the dislocation distributions. Keywords: IF steel, micro alloyed steel (S420), dynamic tensile test, hardness (HV1), dislocation structure Preiskovani sta bili dve jekli iz avtomobilske industrije: jeklo brez intersticij (IF) HSLA (visko trdnostno nizko legirano jeklo) in mikro-legirano jeklo S420. Namen {tudije je bil dolo~iti spremembe lastnosti teh materialov pri stati~ni hitrosti 10 -3 s -1 in dinami~ni hitrosti 10 3 s -1 obremenjevanja. Plasti~nost je bila dolo~ena na vzorcih po stati~nih in dinami~nih preizkusih. Namen preiskave podstruktur je bil dolo~iti razporeditev dislokacij pri razli~nih vrstah obremenjevanja. Skladno z izmerjenimi vrednostmi in s podatki iz literature je bila trdota vseh preizku{enih materialov vi{ja pri manj{i hitrosti deformacije. Ve~je napetostno utrjevanje materialov je bilo potrjeno z razporeditvijo dislokacij. Klju~ne besede: IF jeklo, mikro legirano jeklo (S420), stati~ni natezni preskus, dinami~ni natezni preskus, trdota (HV1), dislokacijska mikrostruktura

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“…can be determined using DIC methods. For better understanding of the main principles of DIC, several publications are devoted to this issue [1][2][3]. Numerical simulations of various technological processes are often used in order to identify critical places or predict final shape after springback etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Analysis of Local Mechanical Properties of Drawn Part

Slota

Jurčišin

Spišák

2013

KEM

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In this study, numerical and experimental results of deep drawing process were compared. Drawn part, used in automotive industry was drawn and measured using ARGUS measurement system, which works on a digital image correlation method (DIC). In order to optimize and verify accuracy of a numerical simulation results, this process was modeled in two codes which work on principle of the finite element method (FEM). Two types of FEM codes were used. Code which works on base of both, implicit and explicit time integration scheme, were used for calculation. Results were compared and discussed.

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Videoextensometric measuring of deformation processes in automotive steel sheets at two strain rate levels

Cited by 9 publications

References 7 publications

Research into Plastic Deformation of Double Reduced Sheets

Research into Plastic Deformation of Double Reduced Sheets

Static and dynamic tensile characteristics of S420 and IF steel sheets

Experimental and Numerical Analysis of Local Mechanical Properties of Drawn Part

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