Simulasi Numerik Hot-Spot Stress dan Stress Concentration Factor pada Sambungan Tubular Sederhana T, Y, K, dan X

In offshore structures installation, tubular joints are commonly used. Tubular joints fabricated with welding processes often cause high hot-spot stress (HSS). High value of HSS and stress concentration factor (SCF) in tubular joints will reduce the service life of offshore structures due to fatigue loads. In this study simple tubular junctions T, Y, K, and X were used to obtain HSS and SCF through FEM simulation. The location of the maximum HSS under axial loading varied around the initial crown, in the In-Plane Bending (IPB) loading located after the second crown, while in the Out-of-Plane Bending (OPB) loading it was around the second saddle. In general, the SCF value in the three loading models from the FEM simulation is lower than SCF formula calculations in the previous study, these results are in line with recent SCF review study.yang difabrikasi dengan proses pengelasan seringkali menimbulkan hot-spot stress (HSS) yang tinggi. Tingginya nilai HSS dan Stress Concentration Factor (SCF) pada sambungan tubular akan mengurangi umur pakai bangunan lepas pantai akibat beban fatigue. Pada studi ini sambungan tubular sederhana T, Y, K, dan X digunakan untuk mendapatkan HSS dan SCF melalui simulasi FEM. Letak HSS maksimum pada pembebanan aksial (FA) bervariasi disekitar crown awal, pada pembebanan In-Plane Bending (IPB) berada setelah crown kedua, sedangkan pada pembeban Out-of-Plane Bending (OPB) berada di sekitar saddle kedua. Secara umum nilai SCF pada ketiga model pembebanan hasil simulasi FEM lebih rendah dari perhitungan formula SCF penelitian sebelumnya, hasil ini selaras dengan hasil studi review SCF yang lebih baru