Joining Thermoplastic Composites 133 TABLE 32.Lap Shear Strength Results for Three Joining Techniques [239] Graphite 3M3569 Resistance Vibration Adheslve Welded Welded Average Lap Shear Strength MPa(psi) 15.75(2284) 23.88(3464) 39.29(5699 Coefficient of Variation(%) 8.8 44.7 7.7 TABLE 33.Comparative Advantages of Six Joining Concepts [104] Reproducibility Suitable for Small and Adaptable to Various Minimal Surface Preparation Large Area Bonding Joint Configurations Adaptable to Automation Minimal Equipment Use On-Line inspection Capability Reworkability Production Environment Adhesive Bonding 10 10 10 Yes 10 No Yes Fasteners Plus Adhesive 10 Yes 10 No Yes Resistance Heating 5 8 8 10 Yes 5 No Ultrasonic Welding 5 5 5 Yes 10 名 Focused IR 10 4 10 Yes 5 Yes Yes Amorphous Thermoplastic Film 10 10 o b 10 Yes 10 Yes Yes 0-Lowest,10-Highest.Joining Thermoplastic Composites 133 TABLE 32. Lap Shear Strength Results for Three Joining Techniques [239] 3M 3569 Adheslve Graphite Resistance Welded Vibration, Welded Average Lap Shear Strength MPa (psi) 15.75 (2284) 23.88 (3464) 39.29 (5699) Coefficient of Variation (%) 8.8 44.7 7.7 TABLE 33. Comparative Advantages of Six Joining Concepts [104] Adhesive Bonding I 10’ Fasteners Plus Adhesive 10 Resistance Heating 5 Ultrasonic Welding I 5 Focused IA 10 Amorphous Thermoplastic Film I 10 9 s / .! 0 9, 10 3 $ i or 0 i? / .! $ 1 1 10 10 10 10 Yes Yes No No Yes Yes I ‘o= Lowest, lO=Highesl