PSI - Issue 17

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

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 17 (2019) 742–749

ICSI 2019 The 3rd International Conference on Structural Integrity An Interactive Web-Based Fatigue Analysis Tool ICSI 2019 The 3rd International Conference on Structural Integrity An Interactive Web-Based Fatigue Analysis Tool

Daniel Kujawski* Western Michigan University, Mechanical and Aerospace Engineering 1903 W Michigan Av., Kalamazoo, MI, 49008-4353, USA Daniel Kujawski* Western Michigan University, Mechanical and Aerospace Engineering 1903 W Michigan Av., Kalamazoo, MI, 49008-4353, USA

Abstract An interactive with easy four-steps, web-based fatigue analysis and life prediction tool is presented. Users around the globe may access it via Internet by means of multiple platforms such as desktop and laptop computers, tablets and/or smart-phones. It is a self-explanatory education software, which is aimed also to assist a designer in a pre-prototype stage in fatigue life estimation of smooth or notched parts subjected to constant amplitude, block loading, and spectrum loading histories. For spectrum amplitude loading a dedicated spectrum software package is provided, which is essential for a potential clean-up and/or desired modifications of a raw spectrum data. Subsequently, a rainflow method is utilized and the corresponding hysteresis loops at the notch-root or critical “hot spot” location are determined and plotted. For notched components, a generalized Neuber’s rule suitable for numerical application is utilized and discussed. It is shown, that the so called Neuber’s “master” curve, involved in such analysis is unique and is only material dependent. The Neuber’s “master” curve is interactive and is applicable for both monotonic and cyclic loading situations. Examples of applications of the proposed method are presented for a constant, block, and spectrum loading situations. Associated fatigue life predictions are calculated using stress, strain, and stress/strain approaches. bstract An inter ctive with e sy four-steps, eb-based fatigue analysi and life pr diction tool is pres n ed. Users around the globe may access it via Int rnet by means of multiple platforms such as desktop and laptop co puters, tablets and/or smart-phones. It is a self-explanatory ucation software, whi h is a med also to assist a de igner in a pre-prototype stage i fatigue life estimation of smooth or no ched p rts subjected to const t amplitude, block oa ing, and spectrum loading histor es. For spectrum amplitude loading a dedica ed spectrum software package is provided, which is essential for a potential clean-up and/or desired modifications of a raw spe trum data. Subsequently, a rainflow method is utilized and the corresp ding hysteresis loop at the notch-roo or critical “hot spot” location ar dete mined and plotted. Fo notched components, a gener lized Neuber’s rule suit ble for numerical application is utiliz d and dis ussed. It is shown, that th s c ll d Neub r’s “master” curve, involved in such an lysis is nique and is only m erial d penden . The Neuber’s “master” curve i inter ctive and is pplicable for both monotonic and cyclic loading situations. Examples of applications of the proposed method are presented for a constant, block, and spectrum loading situations. Associated fatigue life predictions are calculated using stress, strain, and stress/strain approaches.

© 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. P er-review under resp nsibility of the ICSI 2019 organizers.

Keywords: Cloud-based software; interactive Neuber’s rule, bloclk and spectrum loading, fatigue life prediction

Keywords: Cloud-based software; interactive Neuber’s rule, bloclk and spectrum loading, fatigue life prediction

1. Introduction Today’s students would be tomorrow’s key industry players such as managers, designers, and manufacture supervisors. The key players in industry are more familiar with geometry modeling software (CAD) than with software 1. Introduction Today’s students would be tomorrow’s key industry players such as managers, designers, and manufacture supervisors. The key players in industry are more familiar with geometry modeling software (CAD) than with software

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. * Corresponding author. Tel.: +1-269-276-3428; fax: +1-269-276-3421. E-mail address: daniel.kujawski@wmich.edu * Corresponding author. Tel.: +1-269-276-3428; fax: +1-269-276-3421. E-mail address: daniel.kujawski@wmich.edu

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 10.1016/j.prostr.2019.08.099