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Study of Ultrasonic Welding of Glass Fiber Reinforced Thermosetting Epoxy-based Polymers

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Year: 2019
COI code: ICME16_016
Paper Language: English

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Authors Study of Ultrasonic Welding of Glass Fiber Reinforced Thermosetting Epoxy-based Polymers

  Soheil Mirzaahmadi - Ph.D Candidate of Mechanical Engineering, Department of Mechanical Engineering, University of Tarbiat Modares, Tehran, Iran
  Davood Akbari - Assistant Professor, Department of Mechanical Engineering, University of Tarbiat Modares, Tehran, Iran
  Iraj Ahadzadeh - Assistant Professor, Department of Physical Chemistry, University of Tabriz, Tabriz, Iran
  Hamed Tirband - M.Eng. Candidate of Mechanical Engineering, Department of Mechanical Engineering, University of Tarbiat Modares, Tehran, Iran

Abstract:

This paper presents the preliminary results of ultrasonic welding of epoxy- based thermosets by thermoplastic interlayers. The main objective is to understand the possible mechanisms of interfacial adhesion and also to explore feasible approaches such as application of pretreatment processes as cost-effective manufacturing techniques.Therefore, sulfuric acid (H2SO4) solution is employed as an etchant to remove outer epoxy layers and pretreat chemically the surface of thermoset composite for subsequent welding process. The polyvinyl chloride (PVC) and polymethylmethacrylate (PMMA) are used between two thermoset composites as interlayers to bond the thermoset composites by using the ultrasonic welding with a frequency of 15 KHz directed to the workpieces through predesigned mechanical horn. Finally, for the case of PVC interlayer, application of 2 bar pressure, 1.2 s welding time and 3 s holding time selected as welding parameters, the maximum tensile stress is determined to be about 76.9 MPa. In contrast, for the case of PMMA interlayer, 2 bar pressure, 2 s welding time and 3 s holding time as welding parameters, the minimum tensile stress is about 14.8 MPa. So, experimental investigations reveal that ultrasonic welding can be effectively applied in industrial aspects.

Keywords:

Ultrasonic welding , Thermoset and thermoplastic polymers , PVC , PMMA , Epoxy resin

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COI code: ICME16_016

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Mirzaahmadi, Soheil; Davood Akbari; Iraj Ahadzadeh & Hamed Tirband, 2019, Study of Ultrasonic Welding of Glass Fiber Reinforced Thermosetting Epoxy-based Polymers, International Conference on Manufacturing Engineering, تهران, انجمن مهندسي ساخت و توليد ايران, https://www.civilica.com/Paper-ICME16-ICME16_016.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Mirzaahmadi, Soheil; Davood Akbari; Iraj Ahadzadeh & Hamed Tirband, 2019)
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Type: state university
Paper No.: 25579
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