Investigations of fracture on DP980 steel sheet in roll forming process

Wang, Haibo; Yu, Yang; Jia, Fanghui; Han, Fei

doi:10.1016/j.jmapro.2016.03.008

Cited by 29 publications

(13 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the results from Dunand and Mohr (2010 ), Lou and Huh (2013b ), Roth and Mohr (2016 ) suggest that the application of a notched tension specimen in a hybrid approach to calibrate fracture in plane strain will likely lead to inaccurate fracture predictions in bending dominated processes such as the roll forming process. Wang et al (2016 ) further revealed shear deformation in the critical fracture regions of roll formed samples which is in accordance with previous observations which suggest that, depending on the process design, deformation in roll forming can be influenced by shear ( Halmos, 2006 ). This shows the need to understand the influence of shear (and hence the Lode parameter) on fracture in roll forming.…”

Section: Introductionsupporting

confidence: 90%

“…The predominant deformation mode in roll forming is that of bending and failure is usually associated with fracture on the outer tensile surface of the longitudinal bends. Wang et al's study showed that in roll forming, in addition to bending, material deforms in complex stress states that include shear ( Wang et al, 2016 ). Given that the conventional Forming Limit Diagram (FLD) is limited to membrane strains ( Keeler, 1961;Marciniak et al, 2002 ) it is not suitable to determine material failure in processes such as roll forming and bending where through-thickness and curvature effects influence forming and fracture limits and where the stress states are complex ( Hora et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

“…Up to now only Wang et al (2016 ) study focused on the fracture prediction in roll forming. In this work Oyane's fracture model was used to predict fracture for DP980 steel and the model calibration was performed with uniaxial and notched-specimens that were deformed in tension.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The numerical prediction of ductile fracture of martensitic steel in roll forming

Deole

Barnett

Weiß

2018

International Journal of Solids and Structures

View full text Add to dashboard Cite

Section: Introductionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The numerical prediction of ductile fracture of martensitic steel in roll forming

Deole

Barnett

Weiß

2018

International Journal of Solids and Structures

View full text Add to dashboard Cite

“…They suggested that the in-plane strain has to be calibrated from the bending test to obtain higher model accuracy than the notched sample test. Similarly, Haibo Wang et al [ 22 ] adopted the cold roll forming process to examine the fracture mechanism. The damage behavior of the DP980 steel was investigated by microstructure observation and macro mechanics analysis, and the FE model.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of AA5052-H32 Al Alloy with U-Profile in Cold Roll Forming

2021

View full text Add to dashboard Cite

The cold roll forming process is broadly used to produce a specific shape of cold-roll formed products for their applications in automobiles, aerospace, shipbuilding, and construction sectors. Moreover, a proper selection of strip thickness and forming speed to avoid fracture is most important for manufacturing a quality product. This research aims to investigate the presence of longitudinal bow, the reason behind flange height deviation, spring-back, and identification of thinning location in the cold roll-forming of symmetrical short U-profile sheets. A room temperature tensile test is performed for the commercially available AA5052–H32 Al alloy sheets using Digital Image Correlation (DIC) technique, which allows complete displacement and strain data information at each time-step. The material properties are estimated from the digital images using correlation software for tested samples; the plastic strain ratios are also calculated from samples at 0°, 45°, and 90° to the rolling direction. The tested sample’s surface morphology and the elemental analysis are conducted using scanning electron microscopy (SEM) method and energy-dispersive X-ray spectroscopy (EDS) analytical technique combined with element mapping analysis, respectively. The cold roll forming experiments are systematically carried out, and then finite element analysis is utilized to correlate the experiment with the model. The performed cold roll forming numerical model outcome indicates a good agreement with the experimental measurements. Overall, the presented longitudinal strain was observed to influence the geometry profile. The spring-back is also noticed at the profile tail end and is more pronounced at high forming speed with lower strip thickness. Conversely, while the forming speed is varied, the strain and stress variations are observed to be insignificant, and the similar results also are recognized for the thinning behavior.

show abstract

“…on void closure index of 316L stainless steel. Nevertheless, in the case of AHSS, there are scarce publications related to roll forming process by FEM simulations, such as the study done by Li et al [18] where the material and mechanical properties of a cold-rolled DP980 steel were investigated through thermal simulation experiments using ABAQUS software; or, the work realized by Wang et al [19] in which the fracture behavior of a DP980 steel is studied during roll forming processes by ABAQUS software.…”

Section: Introductionmentioning

confidence: 99%

3D-FEM Simulation of Hot Rolling Process and Characterization of the Resultant Microstructure of a Light-Weight Mn Steel

et al. 2021

View full text Add to dashboard Cite

Computational simulation has become more important in the design of thermomechanical processing since it allows the optimization of associated parameters such as temperature, stresses, strains and phase transformations. This work presents the results of the three-dimensional Finite Element Method (FEM) simulation of the hot rolling process of a medium Mn steel using DEFORM-3D software. Temperature and effective strain distribution in the surface and center of the sheet were analyzed for different rolling passes; also the change in damage factor was evaluated. According to the hot rolling simulation results, experimental hot rolling parameters were established in order to obtain the desired microstructure avoiding the presence of ferrite precipitation during the process. The microstructural characterization of the hot rolled steel was carried out using optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that the phases present in the steel after hot rolling are austenite and α′-martensite. Additionally, to understand the mechanical behavior, tensile tests were performed and concluded that this new steel can be catalogued in the third automotive generation.

show abstract

Investigations of fracture on DP980 steel sheet in roll forming process

Cited by 29 publications

References 37 publications

The numerical prediction of ductile fracture of martensitic steel in roll forming

The numerical prediction of ductile fracture of martensitic steel in roll forming

Experimental and Numerical Investigation of AA5052-H32 Al Alloy with U-Profile in Cold Roll Forming

3D-FEM Simulation of Hot Rolling Process and Characterization of the Resultant Microstructure of a Light-Weight Mn Steel

Contact Info

Product

Resources

About