PSI - Issue 40

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 40 (2022) 61–69

© 2022 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 the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics of Materials and Structures. Abstract In this paper, the effect of ultrasonic welding (USW) parameters on the tensile strength of the polyetheretherketon (PEEK) lap joints is reported. The adhesion levels between the joined parts were varied due to different thicknesses and properties of prepreg, as well as some features of the implemented USW procedures. To identify the key resulting factors, computer simulation of the process was applied. The stress- strain state parameters in the lap joints under tension were determined by the author’s software package based on the flat statement of the elasticity theory solved using the finite element method. Changes in the properties of the materials and their delamination were taken into account in the applied algorithms. It was shown that the main parameters influencing the tensile strength of the US-welds were the adhesion level and the number of contact points at the interface. Both macro- and micro-bending of the lap-joints were revealed. Their values depended on the thickness and properties of the interfaced layers (adherends) and affected the tensile strength of the US-welds. © 2022 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 the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: Ultrasonic welding, PEEK, carbon fiber, FEM, adhesion, interface. 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures Investigation of fracture of ‘PEEK -CF- prepreg’ US-consolidated lap joints Bochkareva S. A. a, с , Panin S. V. a,b, * a Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences, Akademicheskiy pr. 2/4,Tomsk, 634055, Russian Federation b National Research Tomsk Polytechnic University, L nin pr.30, Tomsk, 634050, Russian Federation с Tomsk st te univer ity of control systems and radioelectronics, 634 50, Lenin pr.40, Tom k, Russian Federation Abstract In this paper, the effect of ultrasonic welding (USW) parameters on the tensile strength of the polyetheretherketon (PEEK) lap joints is reported. Th adhesion levels b tween the joined parts were varied due to different thickness s and prop rties of prepreg, as well as s m features of the imp em nted USW procedu e . To identify th key resulting factor , computer simulation of the proc ss wa appli d. The stress- strain sta paramete s in th lap joints under tension were determined by th author’s softwar ackage b ed on the flat atement of the el sticity theory so ved using the finite element m hod. Changes in the properties of the materi ls and ir delamination wer taken nto account in the applied algorith s. I was shown that the main param ters influencing the tensile strength of the US-welds were the adhesion level and the nu ber of contact points at the interf ce. Both macro- a d micro-b nding of the lap-joints wer rev aled. Their a ues depe ded on the hi kness and properties of the inte faced layers (adherends) and affected the tensil strength of t US-w lds. © 2022 The Authors. Publi hed by ELSEVIER B.V. This is an open acce s article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under re ponsibility of scientific committe of the15th Int rnational Co ference on Mechanics, Resource and Diagnostics of Materials and S ructur s. Keywords: Ultrasonic welding, PEEK, ca bon fiber, FEM, adhesion, interface. 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Investigation of fracture of ‘PEEK -CF- prepreg’ US-consolidated lap joints Bochkareva S. A. a, с , Panin S. V. a,b, * a Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences, Akademicheskiy pr. 2/4,Tomsk, 634055, Russian Federation b National Research Tomsk Polytechnic University, Lenin pr.30, Tomsk, 634050, Russian Federation с Tomsk state university of control systems and radioelectronics, 634050, Lenin pr.40, Tomsk, Russian Federation

* Corresponding author. Tel.: 8 382 2 286904 E-mail address: svp@ispms.tsc.ru * Corresponding author. Tel.: 8 382 2 286904 E-mail ad ress: svp@ispms.tsc.ru

2452-3216 © 2022 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 the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. 2452-3216 © 2022 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 scientific committe of the15th Int rnational C ference o Mechanics, Resource and Diagnostics of Mate ials and Structures.

2452-3216 © 2022 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 the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics

of Materials and Structures. 10.1016/j.prostr.2022.04.007