The propeller shaft is part of the ship which transmitting rotation from engine to propeller. The shaft is also used in small-medium size of fisherman boat. In order to reduce the cost of production, dissimilar metal bases are used by joining Steel ST41 and 316L Stainless Steel in process. This research was conducted to analyze effect of welding electrode towards tensile strength, macrostructure, and microstructure of Steel ST41 and 316L Stainless Steel welded metal. Two variations of electrode that used in this paper were E309-L and E6013 with Shielded Metal Arc Welding process (SMAW). The other parameter such as current was set at 80 A and voltage was set at 20 V with 20 mm/min welding travel speed. The results of tensile test show average tensile strength max (σmax) of E309-L and E6013 electrode were 581,42 MPa and 599,24 MPa respectively. These results show that welding process is increasing the maximum tensile strength from base material strength level. The microstructure test interpretation shows E309-L electrode has lower possibility to create delta ferrite in HAZ (Heat Affected Zone) rather than E6013 electrode. This means welding process with E6013 tends to have lower corrosion resistance.

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Variation design of open-cell foams located in the bumper car were investigated in this paper. A brief experimental result on the dynamic response of crash was focused on energy absorption and deformation behavior. The bumper design was based on typical design of bumper compared with gradual density of hexagonal foam type. The method used was imitate crashing real behavior dynamic explicit using ABAQUS simulation software with some extra constraint, such as: crashing object and crash direction. Results showed the design strongly affect the value of energy absorption and deformation. Energy absorption was higher using hexagon foams compare to the normal bumper structure with 4.8740 E6 Joule and 4.8572 E6 respectively. Furthermore, highest energy absorption was by simulated redesign hexagon foam into varying thickness (gradual density) – similar to cortical bone structure – with 4.950 E6 Joule. Meanwhile the deformation shows highest value on typical design of bumper with 4 cm translation after crashed. Expected design has to be safe for passengers with have high ability to absorb energy and minimize the deformation movement.

In today's digitalization era, the sensitivity of using design and illustration software is a demand in improving the competencies possessed by students at the high school level. This ability will support students' interests and talents by adjusting the Project Based Learning Program owned by SMAM 1 Gresik, namely the L800 Motorcycle Modification Automotive Project. By introducing and training students using the design and illustration software used, namely Autodesk Inventor: Student Version, This training activity aims to (1) Students are able to use the Autodesk Inventor Application in 2D and 3D schemes, (2) Students are able to gain an understanding of motor engineering components and motor engineering drawings, (3) help teach teachers who teach subjects in the field of applied science. The methods used in this community service are teaching, demonstration and practice methods. The result of this community service is to improve the ability of the participants in terms of designing and modifying the practice of observing L800 motorcycle components and students more easily understand the shape of an Engineering component through Technical Drawings effectively and efficiently due to virtual 3D modeling in the Autodesk Inventor application.