SPR 접합법을 이용한 Al-5052 인장-전단 시험편의 피로강도 = Fatigue Strength of Al-5052 Tensile-Shear Specimens using a SPR Joining Method

다국어 초록 (Multilingual Abstract)

Self-piercing riveting(SPR) is a mechanical fastening technique which is put pressure on the rivet for joining the sheets. Unlike a spot welding, SPR joining does not make the harmful gas and CO2 and needs less energy consumption. In this study, static andfatigue tests were conducted using tensile-shear specimens with Al-5052 plates for evaluation of fatigue strength of the SPR joints. During SPR joining process for the specimen, using the current sheet thickness and a rivet, the optimal applied punching force was foundto be 21 kN. And, the maximum static strength of the specimen produced at the optimal punching force was 3430 N. During the fatiguetests for the specimens, interface failure mode occurred on the top substrate close to the rivet head in the most high-loading range region,but on the bottom substrate close to the rivet tail in the low -loading range region. There was a relationship between applied loadamplitude Pamp and lifetime of cycle for the tensile-shear,Pamp=3395.5 ×N- 0.078. Using the stress-strain curve of the Al-5052 fromtensile test, the simulations for fatigue specimens have been carried out using the implicit finite element code ABAQUS. The relationbetween von-Mises equivalent stress amplitude and number of cycles was found to be σeq=514.7×N-0.033.

참고문헌 (Reference)

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