Resistance welding of glass fiber reinforced thermoplastic composite: Experimental investigation and process parameter optimization |
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| Institution: | 1. College of Aerospace Engineering, Chongqing University, Chongqing 400030, China;2. Chongqing Key Laboratory of Heterogeneous Material Mechanics, Chongqing University, Chongqing 400030, China;3. Chongqing Key Laboratory of Nano–Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China;4. Centre for Advanced Materials Technology, School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia |
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| Abstract: | The utilization of fiber reinforced thermoplastics (FRTP) is expected to fulfill lightweight demand in mass-produced aerospace products. Facing the unavoidable assembly of FRTP parts, fusion bonding methods such as resistance welding are promising compared with mechanical joint and adhesive bonding. In this paper, a procedure has been brought out to understand the relationship between processing conditions and performance of the FRTP welding joints. The adherends were continuous glass fiber reinforced polypropylene (GF/PP) laminates fabricated by hot-pressing method. The influences of time, current and pressure on the bending strength of the resistance welding joints were investigated. A processing window was drawn based on the optical observation of welded surfaces. The quantitative relationship between process parameters and mechanical property of GF/PP welding joint was established by Response Surface Method (RSM) with high accuracy. It was found that bending strength of GF/PP welding joint was improved by 31% compared with hot-pressing benchmark. |
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| Keywords: | Mechanical property Processing parameters Resistance welding Response Surface Method Thermoplastic |
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