Bendability evaluation of sheet metals in three-point bending test by using acoustic emission   features

Seemuang, Nopparat; Panich, Sansot; Slatter, Tom

doi:10.14416/j.appsci.2017.12.001

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…An external load was applied to the welded connection region on the flat surfaces in a bending test, causing the specimen to bend into a U-shape using a computer-controlled hydraulic universal testing machine having Model-WAW-600D; Make-Sunpoc; China, with three-points bend test. As a reason, evaluating stability for mechanically-joined sheet metal components demanded a detailed examination of sheet metal bendability [22]. The bending tests were performed on the weld to determine the existence of a detrimental flaw in the weld metal or whether it had sufficient ductility that matched the base metal [23].…”

Section: Testing Of the Welded Sheet Metal Specimensmentioning

confidence: 99%

Optimization of TIG welding process parameters on 304 austenitic stainless steel sheet metal using fuzzy logic based Taguchi method

Abebe,

Bogale

2023

Eng. Res. Express

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TIG welding can be used to produce excellent weld quality and precise welding operation for sheet metals. The aim of this study was to get the best welding parameters for enhancing ultimate tensile strength, bending strength and Rockwell hardness of the butt-weld joint. The experimental work was used, and the experiment was carried out on 2 mm thickness of 304 austenitic-stainless steel sheet metal using the L9 orthogonal array of the Taguchi design. Automated TIG welding fixture was developed to control the welding speed accurately. The selected welding parameters were welding speed, current, voltage and gas flow rate with their three levels. Based on the fuzzy logic based Taguchi method, the best optimal levels of parameters were found at the values of 110 A of current, 13.86 cm/min of speed, 17.5 V of voltage and 7.5 L/min of gas flow rate. The analysis results of ANOVA showed that gas flow rate and current were found as the significant factors, and the contributions of the gas flow rate, current, speed and error were 47.63%, 34.34%, 16.49% and 1.54%, respectively. According to the confirmation tests, the multi response performance index mean value of the confirmatory test of 0.6068 was found between the 95% confidence interval of 0.5028 and 0.7314, and the maximum ultimate tensile strength, bending strength and Rockwell hardness were obtained 614.8 MPa, 765.32 MPa and 95.3 HRB, respectively.

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Section: Testing Of the Welded Sheet Metal Specimensmentioning

confidence: 99%

Optimization of TIG welding process parameters on 304 austenitic stainless steel sheet metal using fuzzy logic based Taguchi method

Abebe,

Bogale

2023

Eng. Res. Express

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“…The assumption that crack initiate at the max force measured during bending isn't too many cases valid for all steel grades and cannot be universally trusted [9], [13], [14], [15].…”

Section: Test Proceduresmentioning

confidence: 99%

Bendability assessment of advanced high strength steels thanks to artificial neural networks

Teaca,

Dietsch,

Durrenberger

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Thanks to their very important strength in addition to their considerable formability and ductility, the newly developed Advanced High Strength Steel (AHSS) allow carmakers to save mass on the vehicles they produce. However, before industrial implementation by OEMs, any grade has to be approved. The bending test defined in VDA238-100 [1] test specification is a key indicator of the material ductility and is increasingly requested in the scope of their homologation. The test consists in bending a square sample of sheet material with a knife. The sample is supported by two rolls. The aim of this test is to determine the maximum angle reachable by the sample before it breaks. We can also derive the maximum strain reachable by the material before fracture initiation. Mainly 2 different angles are defined: the angle after springback, that can be measured manually and the angle at maximum load, which is to be considered in the VDA238-100. The test specification gives instructions on the determination of the bending angle. Nevertheless, the approach is purely geometric and only relies on the parameters of the test. No influence of the tested material is taken into account. This approach can be improved because for AHSS that are very ductile and have a bending angle over 100°, the proposed formula can provide unphysical results. For this reason, the innovative proposed approach is to calculate the bending angle at maximal force and to determine the fracture strain thanks to Artificial Neural Networks, one of the most promising tools for resolution of engineering problems. This new approach considers a large panel of materials tested experimentally or numerically and significantly improves the prediction.

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Acoustic Emission during Press-Brake Bending of SS 304L Sheets and its Correlation with Residual Stress Distribution after Bending

Lavanya

Mahadevan

Mukhopadhyay

et al. 2021

J. of Materi Eng and Perform

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Bendability evaluation of sheet metals in three-point bending test by using acoustic emission features

Cited by 9 publications

References 4 publications

Optimization of TIG welding process parameters on 304 austenitic stainless steel sheet metal using fuzzy logic based Taguchi method

Optimization of TIG welding process parameters on 304 austenitic stainless steel sheet metal using fuzzy logic based Taguchi method

Bendability assessment of advanced high strength steels thanks to artificial neural networks

Acoustic Emission during Press-Brake Bending of SS 304L Sheets and its Correlation with Residual Stress Distribution after Bending

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