Load-carrying capacity of hot-pressed thermoplastic composite joints

Okan Ozdemir; Dilay Koksal; Ugur Kemiklioglu

doi:10.1515/mt-2022-0147

Article

Load-carrying capacity of hot-pressed thermoplastic composite joints

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Dilay Koksal, born in 1994, received his BSc degree in 2016 at the Department of Mechanical Engineering, his MSc degree in 2020 at the Mechanics branch of the Graduate School of Natural and Applied Sciences, Dokuz Eylul University, Izmir, Türkiye. Her areas of research are impact behaviors of composite structures, post impact behaviors of composite plates, particle reinforced composites and ageing of composite materials.
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Published/Copyright: November 4, 2022

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From the journal Materials Testing Volume 64 Issue 11

Abstract

Composite joints have been commonly used in many industries such as aviation, aerospace, and automotive due to their advantages of being light and durable. Internal stresses may occur especially during the service life of these materials and decrease the load-carrying capacity of the joints. In this study, high density polyethylene (HDPE) and glass fiber reinforced polypropylene composite panels are used resorting to different combinations by using hot-pressing method as a single lap joint, and their mechanical properties are investigated under different temperatures, experimentally. Tensile tests were carried out at different temperatures in order to examine the temperature effect on load-carrying capacity of joints. Different bonding types of composites were compared to obtain the optimal joint configurations. The effect of low velocity impact on the failure response of the joints at impact energy levels of 5 and 10 J is also evaluated. From the tensile tests after impact treatment, it was concluded that transverse impact significantly decreased the load-carrying capacity of the single lap thermoplastic joints. Based upon the experimental results, it was concluded that HDPE–HDPE joints demonstrated higher tensile failure loads at 50 °C after transverse impact. Moreover, the tensile strength of all types of configurations decreased with increasing temperature.

Keywords: glass-fiber reinforced polypropylene; impact loadings; single-lap joint; temperature effect; tensile strength

Corresponding author: Okan Ozdemir, Department of Mechanical Engineering, Dokuz Eylül University, Izmir, Türkiye, E-mail: ozdemir.okan@deu.edu.tr

About the author

Dilay Koksal

Dilay Koksal, born in 1994, received his BSc degree in 2016 at the Department of Mechanical Engineering, his MSc degree in 2020 at the Mechanics branch of the Graduate School of Natural and Applied Sciences, Dokuz Eylul University, Izmir, Türkiye. Her areas of research are impact behaviors of composite structures, post impact behaviors of composite plates, particle reinforced composites and ageing of composite materials.

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
Data availability statements: The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Published Online: 2022-11-04

Published in Print: 2022-11-25

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https://doi.org/10.1515/mt-2022-0147

Keywords for this article

glass-fiber reinforced polypropylene; impact loadings; single-lap joint; temperature effect; tensile strength