PSI - Issue 17

ScienceDirect Available online at www.sciencedirect.com …‹‡…‡ ‹”‡…– Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com …‹‡…‡ ‹”‡…– Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 17 (2019) 434–439

ICSI 2019 The 3rd International Conference on Structural Integrity Failure mechanisms in high-strength eutectoid and duplex stainless steel wires subjected to tensile and transverse loads Mihaela Iordachescu a *, Maricely De Abreu a , Andrés Valiente a a Materials Science Dpt., ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, 3 Prof. Aranguren St., 28040, Madrid, Spain ICSI 2019 The 3rd International Conference on Structural Integrity Failure mechanisms in high-strength eutectoid and duplex stainless steel wires subjected to tensile and transverse loads Mihaela Iordachescu a *, Maricely De Abreu a , Andrés Valiente a a Materials Science Dpt., ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, 3 Prof. Aranguren St., 28040, Madrid, Spain Multi-wire strands are the most common resistant element for structural tendons used in a wide range of applications. The tendons are designed to withstand high tensile loads, but they can also be subjected to permanent or accidental transverse loads that increase the contact forces between the wires, and thus alter their tensile behavior. In this context, the paper presents a comparative experimental analysis of the macroscopic and microscopic failure mechanisms of two types of high-strength wire when subjected to tensile and local transverse loading. The two wires were manufactured by cold drawing, respectively from eutectoid steel and lean duplex stainless steel. The results reveal consistent macroscopic and microscopic differences between both steels wires, which result from the local biaxiality of stress state and from the microstructural alteration induced by the transverse load when large plastic deformation occurs. Multi-wire strands are the most common resistant element for structural tendons used in a wide range of applications. The tendo s are designed to withstand high tensile loads, but t ey can also be subj cted to permanent or accidental transverse loads that increase the contact forces between the wires, and thus alter their tensile b havior. In this context, the paper presents a comparative experimental alysis of the macroscopic and microscopic failure mechanisms of two types of high-strength wire wh n subjected to tensile and loc l transverse loading. The two wires were anufactured by cold drawing, respe tively from eutectoid steel and lean duplex stainless steel. The results reveal consistent macroscopic and microscopic differences between both steels wires, which result from the local biaxiality of stress state and from the microstructural alteration induced by the transverse load when large plastic deformation occurs. Abstract Abstract

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. Keywords: Biaxial load; Fracture; Macro and Micro Mechanisms of Damage; Keywords: Biaxial load; Fracture; Macro and Micro Mechanisms of Damage;

1. Introduction 1. Introduction

Multi-wire strands made of high-strength eutectoid steel wires are the most common resistant element for the structural tendons used in a wide range of civil engineering applications which embrace the whole spectrum from prestressed concrete structures, bridge construction, and geotechnical infrastructures (Dywidag systems, 2017 and BBR HiAm CONA, 2009). The tendons are designed to withstand high tensile loads, but they can also be subjected to permanent or accidental transverse loads that increase the contact forces between the wires and thus, alter their Multi-wire strands made of high-strength eutectoid steel wires are the most common resistant element for the structural tendons used in a wide range of civil engineering applications which embrace the whole spectrum from prestressed concrete structures, bridge construction, and geotechnical infrastructures (Dywidag systems, 2017 and BBR HiAm CONA, 2009). The tendons are designed to withstand high tensile loads, but they can also be subjected to permanent or accidental transverse loads that increase the contact forces between the wires and thus, alter their

* Corresponding author. Tel.: +34-910-674-309; fax: +34-913-366-680. E-mail address: mihaela.iordachescu@upm.es * Corresponding author. Tel.: +34-910-674-309; fax: +34-913-366-680. E-mail address: mihaela.iordachescu@upm.es

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers.

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 10.1016/j.prostr.2019.08.057