Failure characterization and meso-scale damage modeling of spot welds in hot-stamped automotive steels using a hardness-mapping approach

Mohamadizadeh, Alireza; Biro, E.; Worswick, Michael J.

doi:10.1016/j.engfracmech.2022.108506

Cited by 17 publications

(2 citation statements)

References 41 publications

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“…To overcome the challenges associated with the small zones, various techniques have been used: thermo-mechanical simulation using Gleeble, 21,22) micro-tensile testing, 23) hardness-scaling, 24) mini-sheer, 25) and instrumented indentation. 26) Considering the small scale and rounded nature of the investigated region, preparing mechanical specimens is impossible.…”

Section: Introductionmentioning

confidence: 99%

Effect of Paint Baking Treatment on Mechanical Properties of Resistance Spot Welded Q&P 980 Steel

Ramachandran,

Salandari-Rabori,

Midawi

et al. 2024

ISIJ Int.

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This study investigates the impact of paint baking on the macro and micro-mechanical properties of resistance spot welds in quenched and partitioned 980 steels. It is observed that paint baking enhances both peak load and energy absorption during cross-tension tests, as indicated by load-displacement curves. Four different regions were identified from the load-displacement curves after paint baking. An intriguing observation was a quick increase in the loading rate following a prior decrease, attributed to change in crack propagation behavior rather than improved work hardening. The study further simulated the upper-critical heat-affected zone using a Gleeble thermo-mechanical simulator to evaluate flow strength and work hardening. The Kocks-Mecking strain-hardening model was employed to analyze work hardening behavior in the studied conditions.

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Section: Introductionmentioning

confidence: 99%

Effect of Paint Baking Treatment on Mechanical Properties of Resistance Spot Welded Q&P 980 Steel

Ramachandran,

Salandari-Rabori,

Midawi

et al. 2024

ISIJ Int.

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“…Its tensile strength can reach 1200~2000 MPa. Compared with other lightweight materials such as aluminum alloys, hot-stamped steel materials have the advantages of controllable manufacture-use-maintenance cost, good processability, and good lightweight potential, and thereby the proportion of applications is increasing in the automobile field [12][13][14][15][16][17][18][19]. The application of hot-stamped steels as a structural part of the body in white (BIW) can reduce the weight and ensure safety performance.…”

Section: Introductionmentioning

confidence: 99%

Fracture Behavior of the Hot-Stamped PHS2000 Steel Based on GISSMO Failure Model

Guo¹,

Liu²,

et al. 2023

Metals

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Hot-stamped steel is currently the most widely used lightweight material in automobiles, and accurately predicting its failure risk during the simulation is a bottleneck problem in the automobile industry. In this study, the fracture failure behavior of the hot-stamped PHS2000 steel manufactured by Ben Gang Group (Benxi, China) is investigated by experiments and simulation. Static tension and high-speed tension tests are conducted to obtain the elastic-plastic stress-strain relations, and a Swift + Hockett–Sherby model is proposed to describe the hardening behavior under static and high-speed loads. Tests under five kinds of stress states, namely static shear, static tensile shear, notched static tension, center-hole static tension, and static punching, are conducted to obtain the ultimate fracture strains under different stress states for establishing a failure model. The finite element method (FEM) is used to inversely achieve the fracture parameters of the material, and the GISSMO model in LS-Dyna is adopted to describe the fracture characteristics of the material. A fracture card is further established for simulation analysis by combining fracture characteristics with high-speed tension curves and simultaneously loading size effect curves of meshes. Finally, the card is applied in the simulation of the three-point bending test. High-precision results of fracture simulation matching the experimental results are obtained. This research proves that the proposed fracture card is accurate and can be widely used in the simulation of fracture behaviors of the hot-stamped PHS2000 steel.

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An experimental methodology to characterize load-based fracture models of third generation advanced high strength steel resistance spot welds

Shojaee,

Tolton,

Midawi

et al. 2024

Int J Adv Manuf Technol

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Failure characterization and meso-scale damage modeling of spot welds in hot-stamped automotive steels using a hardness-mapping approach

Cited by 17 publications

References 41 publications

Effect of Paint Baking Treatment on Mechanical Properties of Resistance Spot Welded Q&P 980 Steel

Effect of Paint Baking Treatment on Mechanical Properties of Resistance Spot Welded Q&P 980 Steel

Fracture Behavior of the Hot-Stamped PHS2000 Steel Based on GISSMO Failure Model

An experimental methodology to characterize load-based fracture models of third generation advanced high strength steel resistance spot welds

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