PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 23 (2019) 263–268

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. This work presents a genera zed approach based on combined isot ic kinematic hardening (CIKH) model to simulat the deformation ehavior of cyclically stable materials (CSMs). The proposed m th dology provid a single set of hardening parameters obtained using genetic alg rithm optimization techniqu which is used t simulate the response of CSMs under both monoton c and cyclic loading conditions. Reported exp rimental r sults f two ferrous and two non-ferr us mat rial from the existing li rature are re-examined to demonstr e the pote tial of the proposed me hodology. The explanation of the bs rved and the predicted monotonic and the cyclic deformation response of the CSMs are next substantiated in the light of micro-mechanism of deformation. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under th CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture A Generalized Model towards Predicting Monotonic and Cyclic Deformation Behavior of Cyclically Stable Materials Atri Nath a *, Sudhirkumar V. Barai a , Kalyan Kumar Ray b a Department of Civil Engineering, IIT Kharagpur, Kharagpur-721302, India 2 Department of Metallurgical and Materials Engineering, IIT Kharagpur, Kharagpur-721302, India 9th International Conference on Materials Structure and Micromechanics of Fracture A Generalized Model towards Predicting Monotonic and Cyclic Deformation Behavior of Cyclically Stable Materials Atri Nath a *, Sudhirkumar V. Barai a , Kalyan Kumar Ray b a Depar ment of Civil Engin ering, IIT Kharagpur, r r-721302, India 2 Department of Metallurgical and Materials Engineering, IIT Kharagpur, Kharagpur-721302, India Abstract Abstract This work presents a generalized approach based on combined isotropic kinematic hardening (CIKH) model to simulate the deformation behavior of cyclically stable materials (CSMs). The proposed methodology provides a single set of hardening parameters obtained using genetic algorithm optimization technique which is used to simulate the response of CSMs under both monotonic and cyclic loading conditions. Reported experimental results of two ferrous and two non-ferrous materials from the existing literature are re-examined to demonstrate the potential of the proposed methodology. The explanation of the observed and the predicted monotonic and the cyclic deformation response of the CSMs are next substantiated in the light of micro-mechanism of deformation.

Keywords: Cyclic deformation; Ratcheting; Cyclically stable material; Ferrous and non-ferrous materials Keywords: Cyclic deformation; Ratcheting; Cyclically stable material; Ferrous and non-ferrous materials

1. Introduction 1. Introduction

Modeling of monotonic and cyclic stress-strain responses of cyclically stable materials (CSM) is commonly done considering only kinematic hardening (Bari and Hassan, 2000; Ramezansefat and Shahbeyk, 2015) unlike the use of combined isotropic-kinematic hardening (CIKH) for non-CSMs. The isotropic hardening parameters of the CIKH model are usually determined using the variation of maximum stress with number of cycles (Chaboche, 1991). Modeling of mo otonic and cyclic stress-strain re ponses of cyclically st ble materials (CSM) is commonly done nsidering nly kinematic hardening (Bari and Hassa , 2000; Ramezansefat and Shahbeyk, 2015) unlike t use of combined isotropic-kine atic hardening (CIKH) for non-CSMs. Th isotropic hardening parameters f the CIKH model are usually determined using the variation of maximum stress with number of cycles (Chaboche, 1991).

* Corresponding author. Tel.:+919883329026. E-mail address: atri@iitkgp.ac.in * Correspon ing au hor. Tel.:+919883329026. E-mail address: atri@iitkgp.ac.in

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.097