Forming limit diagram of auto-body steel sheets for high-speed sheet metal forming

Kim, S.B.; Huh, Hoon; Bok, Hyun-Ho; Moon, Man-Been

doi:10.1016/j.jmatprotec.2010.01.006

Cited by 118 publications

(47 citation statements)

References 24 publications

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“…The value deviations from the mean value lay within the standard deviation calculated. The finding complies to [16,17,18]. It is assumed, when the strain rate increases, the plastic deformation takes place in more slip planes, i.e.…”

Section: Resultssupporting

confidence: 87%

Quasistatic Strain Rates’ Effect to the Properties of Advanced Steels for Automotive Industry

Evin

Tomáš

Výrostek

2016

Acta Metall Slovaca

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The paper presents the findings of the strain rate effect, described in constitutive material models by strain rate sensitivity index m, to the strength and deformation material properties. These were evaluated from stress-strain diagrams recorded at tensile test using PC controlled testing machine TiraTEST 2300 according to STN EN ISO 6892-1. The high strength low alloyed steel H220PD, dual phase steel DP 600 and Trip steel RAK 40/70 were investigated at strain rates   = 0.0021, 0.083 and 0.125 s -1 . The results indicate major influence of the strain rate to the strength properties while only minor influence have been found when evaluate the deformation properties. The results also shown single phase materials are more sensitive to the strain rate than dual phase materials.

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Section: Resultssupporting

confidence: 87%

Quasistatic Strain Rates’ Effect to the Properties of Advanced Steels for Automotive Industry

Evin

Tomáš

Výrostek

2016

Acta Metall Slovaca

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“…Compared to conventional forming techniques EMF excels due to d the process-specific high velocities and strain rates, which allow s higher formability of many materials without material failure as necking or cracking (e.g. [20,21]), s very accurate forming results since springback effects are significantly reduced [22], s extremely short duration of the deformation process itself.…”

Section: Electromagnetic Formingmentioning

confidence: 99%

Structuring by electromagnetic forming and by forming with an elastomer punch as a tool for component optimisation regarding mechanical stiffness and acoustic performance

et al. 2015

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-Ecological and economic reasons are forcing industry to improve efficiency and to save energy and resources. Especially for the automotive and transport industry -but also for all other industrial branches dealing with accelerated masses -lightweight design is a key issue for achieving this goal. In current product designs, insufficient geometric stiffness of the part often prohibits exploiting the full potential of weight reduction offered by modern materials. Ideally adapting the geometry to the load profile by implementing appropriate structures frequently allows wall thickness and weight reduction. At the same time, the acoustic properties can be improved in many cases, because the natural frequency of the modified structure is higher compared to a conventionally-designed structure, thus leading to a reduction of awkward low frequency noise (humming). To enable a target-oriented design, the influence of structures manufactured by elastomer tools and by electromagnetic forming (EMF) was analysed systematically. Knowledge about the influence of the structuring technology and the process parameters on the resulting structure properties and the part performance allows conclusions regarding the optimisation of the part functionality via a suitable selection and design of the process.

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“…Microstructure is consisting of a soft ferrite matrix containing islands of martensite as the secondary phase (martensite increases the tensile strength). Formability allows the production of thin and strong components for many applications in vehicles [7,8].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Characteristics of Laser Welded DC06EK and DP600MC Steel Sheets

et al. 2017

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Welding of different types of steel is fundamental proces for the production of car bodies. Fatigue degradation is still a significant factor in long-term use. Current trends welding and combinations of different types of steel are used. The specific form of the course of fatigue in the welded joints is followed. Test samples loaded fatigue tests, microscopic and scanning electron microscopy analysis of welded joints of steel type IF (DC06EK) and DP (DP600MC) are done. The resulting values of endurance tests are graphically processed by the Wöhler curve.

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Forming limit diagram of auto-body steel sheets for high-speed sheet metal forming

Cited by 118 publications

References 24 publications

Quasistatic Strain Rates’ Effect to the Properties of Advanced Steels for Automotive Industry

Quasistatic Strain Rates’ Effect to the Properties of Advanced Steels for Automotive Industry

Structuring by electromagnetic forming and by forming with an elastomer punch as a tool for component optimisation regarding mechanical stiffness and acoustic performance

Fatigue Characteristics of Laser Welded DC06EK and DP600MC Steel Sheets

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