Constitutive Behavior of AA5754 Sheet Materials at Large Strains

Kang, Jidong; Wilkinson, David S.; Wu, Peidong; Bruhis, M.; Jain, Mukesh; Embury, J.D.; Mishra, Raja K.

doi:10.1115/1.2931151

Cited by 50 publications

(13 citation statements)

References 10 publications

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“…Furthermore, it has a rather simple geometry that is easy to fabricate. Contrary to a number of shear sample geometries in the literature [17,18,20,21,26], it does not have a reduced thickness in the shear zone which avoids complications such as machining-induced surface defects and residual stresses that can initiate fracture.…”

Section: Quasi-static Conditionmentioning

confidence: 99%

“…Alternatively, a number of experimental studies have involved designing complex test geometries with the aid of finite element simulations where a tensile load is converted to a shear stress in the gauge area of the samples [18][19][20][21][22][23][24][25][26][27][28]. The principal advantage of these geometries is that the shear tests can be readily performed using conventional tensile test frames.…”

Section: Introductionmentioning

confidence: 99%

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Fracture Characterization of Rolled Sheet Alloys in Shear Loading: Studies of Specimen Geometry, Anisotropy, and Rate Sensitivity

2016

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Two different shear sample geometries were employed to investigate the failure behaviour of two automotive alloy rolled sheets; a highly anisotropic magnesium alloy (ZEK100) and a relatively isotropic dual phase steel (DP780) at room temperature. The performance of the butterfly type specimen (Mohr and Henn, 2007;Dunand and Mohr, 2011) was evaluated at quasi-static conditions along with that of the shear geometry of Peirs et al.(2012) using in situ digital image correlation (DIC) strain measurement techniques. It was shown that both test geometries resulted in similar strain-paths; however, the fracture strains obtained using the butterfly specimen were lower for both alloys. It is demonstrated that ZEK100 exhibits strong anisotropy in terms of failure strain. In addition, the strain rate sensitivity of fracture for ZEK100 was studied in shear tests with strain rates from quasi-static (0.01 s -1 ) to elevated strain rates of 10 s -1 and 100 s -1 , for which a reduction in fracture strain was observed with increasing strain rate.

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Section: Quasi-static Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fracture Characterization of Rolled Sheet Alloys in Shear Loading: Studies of Specimen Geometry, Anisotropy, and Rate Sensitivity

2016

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“…It should be kept in mind that ASTM B831 considers a specimen with shear path equal to 6 mm and it is commonly employed to determine the shear strength of thin aluminum alloys. Due to its simplicity, the slotted shear is an attractive approach, however, it is reported in literature that slotted shear specimens exhibit unwanted effects such as severe distortion and non-uniformity of the stress distributions in the gage section [12,13,15].…”

Section: Specimens: Modified Slotted Shear and V-notched Rail Shearmentioning

confidence: 99%

“…To overcome these limitations, some modifications of ASTM B831 have been suggested. A modified specimen with a thickness reduction in the gauge section was proposed for preventing rotation of the shear zone [12]. In addition, a different modified slotted shear specimen for monotone and reverse shear tests was E-mail addresses: luizcsn@mec.uff.br, luizcsn@id.uff.br.…”

Section: Introductionmentioning

confidence: 99%

Modified slotted shear test for a thin sheet of solid polymer under large deformations

Nunes

2015

Polymer Testing

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a b s t r a c tA modified slotted shear test based on ASTM B831 is proposed and used for determining the mechanical behavior of a solid polymer at large deformations. The shear stress-strain response of a thin sheet of polytetrafluoroethylene was experimentally investigated and a V-notched rail shear test was carried out to validate the experimental results obtained with the proposed approach. Displacement and strain fields of the test specimens were estimated by the Digital Image Correlation method. The results indicate agreement between both tests for small deformations, while for large deformations significant discrepancies in shear stress-strain responses are observed. These discrepancies can be attributed to unwanted distortions of the gage section observed in the V-notched specimens. The modified slotted shear test provided a uniform shear strain distribution across the gauge section of specimens. In addition, the principal advantages of the proposed approach over V-notched rail shear test are a wide range of shear strains and absence of unwanted distortions.

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“…The most common shear test involves clamping a rectangular specimen and moving the clamps in opposite directions to impose a shear deformation. Alternatively, various experimental techniques and geometries have been proposed in the literature but most require a complex geometry that is inconvenient for dynamic testing [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of strain rate on shear properties and fracture characteristics of DP600 and AA5182-O sheet metal alloys

Rahmaan

Butcher

Abedini

et al. 2015

EPJ Web of Conferences

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Abstract. Shear tests were performed at strain rates ranging from quasi-static (.01 s −1 ) to 600 s −1 for DP600 steel and AA5182-O sheet metal alloys at room temperature. A miniature sized shear specimen was modified and validated in this work to perform high strain rate shear testing. Digital image correlation (DIC) techniques were employed to measure the strains in the experiments, and a criterion to detect the onset of fracture based on the hardening rate of the materials is proposed. At equivalent strains greater than 20%, the DP600 and AA5182 alloys demonstrated a reduced work hardening rate at elevated strain rates. At lower strains, the DP600 shows positive rate sensitivity while the AA5182 was not sensitive to strain rate. For both alloys, the equivalent fracture strain and elongation to failure decreased with strain rate. A conversion of the shear stress to an equivalent stress using the von Mises yield criterion provided excellent agreement with the results from tensile tests at elevated strain rates. Unlike the tensile test, the shear test is not limited by the onset of necking so the equivalent stress can be determined over a larger range of strain.

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Constitutive Behavior of AA5754 Sheet Materials at Large Strains

Cited by 50 publications

References 10 publications

Fracture Characterization of Rolled Sheet Alloys in Shear Loading: Studies of Specimen Geometry, Anisotropy, and Rate Sensitivity

Fracture Characterization of Rolled Sheet Alloys in Shear Loading: Studies of Specimen Geometry, Anisotropy, and Rate Sensitivity

Modified slotted shear test for a thin sheet of solid polymer under large deformations

Effect of strain rate on shear properties and fracture characteristics of DP600 and AA5182-O sheet metal alloys

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