PSI - Issue 33

Muhammad Faiz Dzulfiqar et al. / Procedia Structural Integrity 33 (2021) 59–66 Dzulfiqar et al. / Structural Integrity Procedia 00 (2019) 000–000

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4.2. Factor of safety The structure of the automatic thickness checking machine is subjected to the load of the moving mechanism structure made of Festo components assembly. These components have the basic mass and the moving mass. The research was conducted by calculating the total possible mass (Richard and Keith., 2015). By the basic theory of factor of safety, comparison between the ultimate load and allowable load, it can be considered that the load given can be added up to the amount of factor of safety and not exceed the maximum allowable ultimate load (Burdekin., 2007). An object is safe if the minimum value of safety of factor is 1. As presented in Fig. 5, it indicates that the structure of the aluminum thickness checking machine is safe to use due to the safety factor score reached more than 1. The minimum factor of safety is 3.362, and this result can be calculated that the given load can reach up to 3.362 times the current given load. Calculated this load is 168.1 N. The maximum safety factor is 15, which was located on the beam with the least forces affected by the given load.

Fig. 5. Factor of safety's contours.

4.3. Displacement A deflection on a beam with a direction perpendicular to its axis is caused by the bending loads applied to a beam (Mott and Vavrek., 2018). Many methods should be noted to evaluate the design. One of them is displacement, and displacements are 0 in the initial condition. Based on the statistical analysis of the measured data, the maximum magnitude of the plates' initial deflection is presented as a function of the plate slenderness ratio and the plate aspect ratio (Hosseinabadi et al., 2021). As presented in Fig. 6, the red areas on the structure of the automatic checking machine have the most considerable deflection that occurred by the given static load. The red area is located on the right upper side of the frame, and this is caused because the beam has two forces applied on it, and the distance of the two loads is shorter than the load's distance on the upper left side of the structure. Nonetheless, the deflecting amount is really small, so that the deflection is not affecting the structure (Hong et al., 2016). Moreover, the detailed minimum and maximum deflection values of each plane are shown in Table. 4.

Fig. 6. Contours of the component displacement.