J043033 CFRTP継手のジュール発熱を利用した融着法に関する基礎的研究([J04303]高分子基複合材料の加工と評価(3))

概要

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In this study, a new welding method which utilizes conductivity of CFRTP (Carbon fiber reinforced thermoplastic) is proposed. Electrical current is applied through the CFRTP single-lap joints in thickness direction. Since resistance of joining surface is the highest in the current path, the joining surface is preferentially heated by Joule heating. In this study, spot welding and surface welding were conducted. By applying constant voltage of 5.0V or ,10.3V, the joint-surfaces were heated above glass transition temperature of the material and were welded. In order to evaluate lap-shear strength (LSS) of welded joints by proposed method, tensile lap-shear tests were conducted. As a result, the tensile lap-shear true stress of spot welding is 31.0MPa and nominal stress of surface welding is 22.0MPa (CF Fabric/PEI) and 21.6MPa (CF Fabric/PPS) . These strengths were comparable to those that were welded by traditional resistance welding (19-22MPa) . It is also found that LSS is changed with welding pressure of joint parts.
一般社団法人日本機械学会の論文
2011-09-11