PSI - Issue 39

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 39 (2022) 139–147

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of CP 2021 – Guest Editors Abstract The aim of the present paper is to investigate the influence of plane mixed-mode loading on the kinking angle of clinchable metal sheets. In many fields of product manufacturing, the structures consist of individual components and sheets. The sheets can be joined to form complex structures with the aid of the simple and auxiliary part-free joining process "clinching". The main area of application are sheet metals with a maximum total thickness of 4 mm. During operation, joined structures can experience multi axial, out-of-phase mixed-mode loading, causing small defects or cracks to propagate through the structure and ultimately lead to the component failure. Beginning with investigations of the influence of plane mixed-mode loading on the kinking angle of clinchable metal sheets, CTS specimens are taken from the 1.5 mm thick metal sheets of the base material used in the clinching process. In these specimens a pre-crack is initiated by Mode I loading. Subsequently, the specimens are clamped at different loading angles with the help of a special loading device, which enables a superposition of normal and shear loading. Under different loading angles, the specimens are subjected to cyclic loading to cause a kinking of the crack path. The resulting kinking angle is measured and compared with an analytical criterion for determining the kinking angle. Furthermore, the criterion is verified with the help of numerical crack growth simulation. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of CP 2021 – Guest Editors Keywords: plane mixed-mode loading; kinking angle; clinchable metal sheets Abstract The aim of the present paper is to investigate the influence of plane mixed-mode loading on the kinking angle of clinchable metal s eets. In many fields of product manufac uring, the structures consist of individual compon nts and sheets. The sheets can be joined to form complex structures with the aid of the simple and auxiliary part-free joining proce s "clinching". The main area of application are sheet metals with a maximum t tal thickness of 4 mm. During op rat on, joined tru tures can exp rience multi xial, out-of-phas mix d-mode loading, causing small defects or cracks to propagate through the structure and ultimately lead to the component failure. Beginning with investi ations of the influence f plane mixed-mode loading on the kinking angle of clin hable metal sheets, CTS specimens are taken from the 1.5 mm thick met l sheets of the base material us d the clinching pro ess. In th se specimens a pre- rack is initi ted by Mode I loading. Subsequently, the specimen are clamped at differ nt load angl with the help of a special loading dev ce, which enables a superposition of normal and sh ar loading. Un er , the sp cimens are subjected to cyclic loading to c use kinking of the crack p th. The resulting kinki g angle is measured d compared with an analytical criterion for determining th kinking angle. Fu thermore, t criterion is verified with the help of numerical crack growth simulation. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of CP 2021 – Guest Editors Keywords: plane mixed-mode loading; kinking angle; clinchable metal sheets 7th International Conference on Crack Paths Influence of plane mixed-mode loading on the kinking angle of clinchable metal sheets Deborah Weiß * , Britta Schramm, Gunter Kullmer 7th International Conference on Crack Paths Influence of plane mixed-mode loading on the kinking angle of clinchable metal sheets Deborah Weiß * , Britta Schramm, Gunter Kullmer Applied Mechanics (FAM), Paderborn University, Pohlweg 47-49, 33098 Paderborn, Germany Applied Mechanics (FAM), Paderborn University, Pohlweg 47-49, 33098 Paderborn, Germany

* Corresponding author. E-mail address: weiss@fam.uni-paderborn.de * Corresponding author. E-mail address: weiss@fam.uni-paderborn.de

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of CP 2021 – Guest Editors 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of CP 2021 – Guest Editors

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of CP 2021 – Guest Editors 10.1016/j.prostr.2022.03.082