Analysis of weld joints on motorbike chasis using Sysweld software

Cijevne šasije kroz povijest mijenjale su se s ciljem poboljšanja sigurnosti, nosivosti, voznih svojstava itd. Trend korištenja lakših materijala vidljiv je u svim poljima pa tako i pri izradi šasija. Odabran je niskolegirani krom molibdenski čelik zbog svojih svojstava kao što su čvrstoća, krutost, otvrdnjivost, otpornost na trošenje, otpornost na koroziju, dobra obradivost, dobra zavarljivost. Napravljen je Solidworks model šasije prilikom čega su korištene dimenzije uzete iz pravilnika Motostudent natjecanja. Isti materijal, 25CrMo4, je zaštićen na dva načina, elektrostatskim postupkom nanošenja praška i postupkom mokrog lakiranja. Za oba postupka zaštite osigurana je odlična korozijska postojanost. Provedena je i priprema spoja te zavarivanje istog uz definirane parametre. Nakon toga je model spoja napravljen u Sysweld programu u kojem je pomoću numeričkih metoda simulirano zavarivanje te su dobiveni rezultati koji prikazuju raspodjelu temperatura, naprezanja i deformacija prilikom zavarivanja.Chassis design and manufacturing have been changing in order to achive safety, payload and driving condition improvement throughout the history. The trend of lightweight materials use is visible in all fields, even while making chassis. Low - alloyed chrome molybdenium steel is selected in application due to its properties such as stiffness, cureablility, wear resistance, corrosion resistance, good workability and good weldability. The Solidworks entire chassis model was made by using the dimensions taken from the Motostudent competition rule book. The same material, 25CrMo4, has been protected from corrosion impact by using two different methods, electrostatic powder application and wet lacquer method. It is provided with excellent corrosion resistance stability for both protection procedures. The preparation of the joint and welding were carried out along the defined parameters. Then the model is made in the Sysweld program in which welding simulation was accomplished. The results of the simulation have been presented by showing distribution of temperature, strain and deformation while welding