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Investigation of GFRP/AA7075-T6 Scarf Joint as a Robot Arm for High Natural Frequency and Damping Ratio

  • Research Article-Mechanical Engineering
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Abstract

One of the most important factors negatively affecting the efficiency of a robot arm is excessive weight. Therefore, the present work is focused on the application of polymer-metal composite instead of monolithic aluminum (Al) beam for high free vibration performance with lightweight. Vibration behavior of the robot arm with a scarf joint configuration is evaluated through the experimental and simulation results. Moreover, mechanical properties and interface morphology of the hybrid beam (HB) are investigated. Scanning electron microscope (SEM) analysis of the fracture surfaces is also performed after the tensile-shear testing. According to the experimental results, it is observed that the natural frequency and damping ratio are improved for the HB compared to the monolithic aluminum by 21.36% and 150%, respectively. Furthermore, the obtained simulation results are in tight agreement with the experimental findings. After the parametric study performed, it is discovered that the ratio of aluminum component in the hybrid robot arm should be 70.45% for the maximum frequency. The physicochemical variation on the metallic adherend after the laser ablation and accordingly the formation of more favorable conditions is proved for the Al-PA66 composite direct bonding. An average failure load of 2844 N is achieved, and it has been realized that the post-tensile fractured surfaces demonstrate a combined failure mode as the cohesive with composite adherend failure. The overall results show that a higher natural frequency and damping ratio, accompanied by favorable mechanical properties, can be achieved for the HB produced through direct bonding in the scarf configuration.

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Data Availability

The raw/processed data used herein to justify these findings can be shared upon reasonable request. Interested researchers can directly contact the corresponding author.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Dokuz Eylul University, Izmir, 35390, Turkey

    Gökçe Mehmet Gençer, Nahit Öztoprak, Murat Akdağ & Hayrettin Şen

  2. Department of Mechatronics Engineering, Izmir Katip Celebi University, Izmir, 35620, Turkey

    Hayrettin Şen

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  1. Gökçe Mehmet Gençer
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Gençer, G.M., Öztoprak, N., Akdağ, M. et al. Investigation of GFRP/AA7075-T6 Scarf Joint as a Robot Arm for High Natural Frequency and Damping Ratio. Arab J Sci Eng 49, 2027–2044 (2024). https://doi.org/10.1007/s13369-023-08093-0

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