Strain rate and aging effect on the mechanical properties of sheet steels

“…Previous investigations [1][2][3][4][5][6] have found that stress increases with loading rate for various metallic materials, and thus determination of yield strength and ultimate strength are sensitive to the loading rate during testing. The Australian Standard (AS) [7], European Code (BSI) [8] and American Specification (ASTM) [9] specify a range of loading rate for tensile coupon tests.…”

Section: Introductionmentioning

confidence: 99%

The art of coupon tests

Huang

Young

2014

Journal of Constructional Steel Research

293

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Tensile coupon tests are commonly carried out to determine the material properties of metallic materials in research and industry. However, ambiguities are found in the current specifications in determining initial Young's modulus of material, which may lead to different test results. The material properties lay the crucial foundation in research and structural design. Different researchers may interpret coupon test results differently. Therefore, standard procedures of coupon test and the interpretation of test results are important and worth investigating. In this study, a series of tensile coupon tests on metallic materials, such as cold-formed carbon steel, cold-formed stainless steel and aluminium alloy, were carried out using different test and data analysis procedures. Two types of stainless steel material, namely lean duplex and ferritic, were investigated. The test and data analysis procedures of loading rate on coupon specimens, determination of cross-sectional area of curved coupons and Young's modulus were carefully designed. In this study, tensile coupon test and data analysis procedures are proposed for both flat and curved coupons. The proposed procedures are able to eliminate possible errors and provide clear guidelines for tensile coupon tests.

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“…Also, the stain rate effect on the fracture strain of the material is not considered in this model. In fact, in addition to the yield stress and the ultimate strength, fracture strain also increases with strain rate (Jama et al, 2009;Pan et al, 2001;Smerd et al, 2005). Johnson and Cook (1985) model is another widely used dynamic material model for steel.…”

Section: Materials Model For Steelmentioning

confidence: 99%

Pressure–impulse response of semi-rigidly connected steel plates under blast loading

Lin

Ashraf

2016

International Journal of Protective Structures

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In this study, a three-dimensional finite element model is developed to investigate the pressure-impulse response of the steel plates with semi-rigid connections under blast loads. The strain rate effect on the material properties is considered, and a number of spring elements are used for simulating the plate to support connections. Once verified, the developed finite element model is then used to investigate the effects of a series of parameters on the blast resistance and energy absorption capability of the steel plates, including the effects of connection rigidity, plate thickness, impulse loading and the shape of corrugation.

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Strain rate and aging effect on the mechanical properties of sheet steels

Cited by 12 publications

References 3 publications

Seismically induced cyclic buckling of steel columns including residual-stress and strain-rate effects

Seismically induced cyclic buckling of steel columns including residual-stress and strain-rate effects

The art of coupon tests

Pressure–impulse response of semi-rigidly connected steel plates under blast loading

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