Inversion of a full-range stress–strain relation for stainless steel alloys

Abdella, Kenzu

doi:10.1016/j.ijnonlinmec.2005.10.002

Cited by 69 publications

(57 citation statements)

References 8 publications

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“…The inverted compound Ramberg-Osgood material model, proposed by Abdella [15] was employed within the predictive model to mimic the stress-strain response of the unformed sheet material, with key points obtained from the mill certificate. The maximum surface plastic strains were incorporated into the material model to deduce the ensuing enhanced strength.…”

Section: Rossi [5] Predictive Modelmentioning

confidence: 99%

Strength enhancements in cold-formed structural sections — Part II: Predictive models

Rossi

Afshan

Gardner

2013

Journal of Constructional Steel Research

117

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Cold-formed structural sections are manufactured at ambient temperature and hence undergo plastic deformations, which result in an increase in yield stress and a reduction in ductility.This paper begins with a comparative study of existing models to predict this strength increase. Modifications to the existing models are then made, and an improved model is presented and statistically verified. Tensile coupon data from existing testing programmess have been gathered to supplement those generated in the companion paper [1] and used to assess the predictive models. A series of structural section types, both cold-rolled and pressbraked, and a range of structural materials, including various grades of stainless steel and carbon steel, have been considered. The proposed model is shown to offer improved mean predictions of measured strength enhancements over existing approaches, is simple to use in structural calculations and is applicable to any metallic structural sections. It is envisaged that the proposed model will be incorporated in future revisions of Eurocode 3 [2,3].

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Section: Rossi [5] Predictive Modelmentioning

confidence: 99%

Strength enhancements in cold-formed structural sections — Part II: Predictive models

Rossi

Afshan

Gardner

2013

Journal of Constructional Steel Research

117

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“…(10) and (11) cannot be exactly inverted to express stress as a function of strain, Gardner and Ashraf [36] provided stress values as a function of strain values for the most commonly used structural stainless steels in a tabulated format. Alternatively, a recently developed approximate inversion of the aforementioned material model proposed by Abdella [45] can be adopted.…”

Section: Materials Behaviourmentioning

confidence: 99%

Discrete and continuous treatment of local buckling in stainless steel elements

Gardner

Theofanous

2008

Journal of Constructional Steel Research

141

254

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a b s t r a c tCross-section classification is an important concept in the design of metallic structures, as it addresses the susceptibility of a cross-section to local buckling and defines its appropriate design resistance. For structural stainless steel, test data on cross-section capacity have previously been relatively scarce. Existing design guidance has been developed based on the limited experimental results and conservative assumptions, generally leading to unduly strict slenderness limits. In recent years, available test data for stainless steel cross-sections have increased significantly, enabling these slenderness limits to be re-assessed. In this paper all available stainless steel test data have been collected and additional moment-rotation curves have been presented. The study covers both cold-formed and welded plated elements as well as CHS. Following analysis of the test results, new slenderness limits for all loading conditions have been proposed and statistically validated. In addition to re-assessment of the current slenderness limits, a new approach to the treatment of local buckling in structural elements -the Continuous Strength Method -has been outlined. The Continuous Strength Method (CSM) is based on a continuous relationship between cross-section slenderness and deformation capacity and is applied in conjunction with accurate material modelling. The method enables more rational and precise prediction of local buckling than can be achieved with the traditional cross-section classification approach, thus allowing better utilization of material and more economic design.

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“…However, for stress levels beyond σ 2 , Eq. (3) tends to overestimate the stress values significantly [13,20]. Therefore, for σ > σ 2 , the usual Ramberg-Osgood relation expressed in Eq.…”

Section: The Full-range Stress-strain Relationship At Normal and Highmentioning

confidence: 95%

“…More recently, based on a power law assumption for the fractional deviation of the full-range stress-strain curve from the linear elastic rule, Abdella derived an approximation to the closed-form inversion for the full-range stress values [20,21]. While Abdella's approximations are highly accurate near the ultimate stress, they show significant errors for lower stress values.…”

Section: Introductionmentioning

confidence: 99%

Inversion of a full-range stress–strain relation for stainless steel alloys

Cited by 69 publications

References 8 publications

Strength enhancements in cold-formed structural sections — Part II: Predictive models

Strength enhancements in cold-formed structural sections — Part II: Predictive models

Discrete and continuous treatment of local buckling in stainless steel elements

Explicit full-range stress–strain relations for stainless steel at high temperatures

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