Crash Performances of Advanced High Strength Steels of DP780, TRIP780 and DP980

Chen, X. M.; Shi, Ming; Chen, G.; Kamura, M.; Watanabe, Kenichi; Omiya, Y.

doi:10.4271/2005-01-0354

Cited by 14 publications

(3 citation statements)

References 8 publications

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“…these steels will be discussed later in this chapter. Numerous studies of the energy absorbing behavior of these steels have shown the significant benefit of dual phase steels for absorbing energy during crash events (Yan et al, 2005;Chen et al, 2005). Furthermore, the potential for absorbing energy has also been shown to be highly correlated to tensile strength.…”

Section: Dual Phase Steelsmentioning

confidence: 98%

Advanced steels for lightweight automotive structures

Horvath¹

2010

Materials, Design and Manufacturing for Lightweight Vehicles

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Section: Dual Phase Steelsmentioning

confidence: 98%

Advanced steels for lightweight automotive structures

Horvath¹

2010

Materials, Design and Manufacturing for Lightweight Vehicles

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“…A series of studies indicate that [1][2][3][4][5] strain rate sensitivity is the inherent property of general materials especially to HSS and AHSS. Under general condition, both yield and ultimate strengths will increase and ductility will decrease along with rising strain rate.…”

Section: Introductionmentioning

confidence: 99%

A Study on High Speed Tension Property of C-Grade Bullet Proof Steel Plate

Zhao

Fang

et al. 2014

AMR

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In this paper, the high speed tension experiments have been performed on ultra high strength bullet proof steel. The samples were cut from the bullet proof steel plate after hard-module quenching with thickness of 3.7 mm. The mechanical properties at strain rates of 0.001 s-1, 0.01 s-1, 0.1 s-1 and 1 s-1 were carried out on MTS810, while those at higher strain rates of 200 s-1, 500s-1 and 1000s-1 were tested on HTM5020 high speed tension tester and Hopkinson bar. The data from the high-speed tension experiments were fitted via Johnson-Cook constitutive equation, and the fracture surface of each sample was analyzed by SEM. The results indicate that, the shoot-resistance capability of bullet proof steel is closely related to its strength, thickness and flow behaviors under high strain rate. The shoot-resistance will be improved in the case of higher strength and better matching between strength and elongation. The Johnson-Cook equation fitted via experimental data provides fundament to numerical simulation. With the increase of strain rate, the size and depth of dimple trend to decrease and the depth of dimple changes less in steel with lower strength and higher elongation. The SEM analysis of fracture is benefit for further understanding of deformation and fracture mode under high strain rate.

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“…Substantial effort has been directed toward the development of dual-phase (DP) steels for applications in transportation industries [1][2][3]. The unique mechanical behavior of DP steels includes continuous yielding, a low yield/tensile ratio, a high rate of work hardening, and high uniform and total elongation [4].…”

Section: Introductionmentioning

confidence: 99%

Mode I Fracture at Spot Welds in Dual-Phase Steel: An Application of Reverse Digital Image Correlation

et al. 2010

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Strain fields in 600 grade dual-phase steel V-notch tensile specimens, both with and without a spot weld, were measured after mode I fracture initiation. Starting with the final image of a fully developed crack, a novel reverse digital image correlation (DIC) analysis was used to determine the path that the crack followed at the onset of fracture as well as the crack tip deformation field. This gave the pixel coordinates of grid points on both sides (i.e. fracture surfaces) of the crack path in the undeformed image. Strain fields that develop in the base material regions surrounding the two fracture surfaces were subsequently measured with forward DIC analysis. Steady state values of the crack tip opening displacement (CTOD) and crack tip opening angle (CTOA), which are important fracture parameters, were measured for the base DP600 metal. Notch tip opening displacement (NTOD) and notch tip opening angle were also measured. It was found that steady state values of the CTOD and CTOA are reached within 2 mm or so of crack growth following completion of the flat-to-slant transition of the fracture surface and stabilization of the crack tunneling effect.

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Crash Performances of Advanced High Strength Steels of DP780, TRIP780 and DP980

Cited by 14 publications

References 8 publications

Advanced steels for lightweight automotive structures

Advanced steels for lightweight automotive structures

A Study on High Speed Tension Property of C-Grade Bullet Proof Steel Plate

Mode I Fracture at Spot Welds in Dual-Phase Steel: An Application of Reverse Digital Image Correlation

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