07.29: A unified methodology for the modelling of steel behaviour: An application‐oriented methodology. (13th September 2017)

• Record Type: Journal Article
• Authors: Hassan, Muhammad Shariq; Salawdeh, Suhaib; Goggins, Jamie
• Is Part Of: Ce/papers. Volume 1:issue 2/3(2017)
• Page Start: 1756
• Page End: 1765
• Publication Date: 2017-09-13
• Subjects: Empirical models -- ductile steel behaviour -- cold‐formed steel hollow sections -- steel coupons; Civil engineering -- Periodicals; 624
• DOI: 10.1002/cepa.219
• Languages: English
• ISSNs: 2509-7075

Abstract

ABSTRACT: This paper presents a universally applicable methodology for the development of a material model for steel subject to static tensile loading. It is the first methodology ever presented in a unified format in the context of steel behaviour, and is critical for the ductile designing of steel elements. Hook's model, Hollomon's model and the Modified Weighted Average model (MWA) are extensively used in literature to model the linear elastic, strain hardening and necking behaviour of steel, respectively. In this paper, these three empirical models have been unified and linked empirically in order to format a design approach. In order to demonstrate the applicability of the design approach, a set of coupon test data, which reflects the material properties of 40×40×2.5, 20×20×2.0, and 50×25×2.5mm cold‐formed steel hollow specimens, is used. The material model is utilised in finite element models in simulations of the structural hollow tubes under tension loading. The simulated results are validated in terms of initial yield strength, ductility, material stress‐strain and hysteretic load‐displacement behaviour by using another set of measured data from physical tests, highlights the effectiveness of the methodology.