Maximum Stress Displacements Safety Factor

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3. RESULT

AND DISCUSSION

3.1 Maximum Stress

Figure 3. Von Mises Stress Simulation The figure above shows the analysis result of tool when it was loaded by 1200 N loads. The color gradient indicates the distribution of Von Mises Stress since the blue is the lowest stress and gradually changes into the red that visualize the largest stress. Consider to the visualization, the maximum stress of UMS-001 is located on node 11600 with the value 1.619.680.640 Nm 2 . With the same material to build the extended jaws that is carbon sheet metal 5 mm thick, UMS-002 has smaller maximum stress is recognized on 752.397.824 Nm 2 . Figure 4. Stress Comparison between UMS-001 and UMS-002 0,0E+00 1,0E+08 2,0E+08 3,0E+08 4,0E+08 5,0E+08 6,0E+08 7,0E+08 8,0E+08 9,0E+08 1,0E+09 1,1E+09 1,2E+09 1,3E+09 0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 V o n Mi se s S tr e ss N m 2 Loads kN UMS-001 UMS-002 8

3.2 Displacements

Figure 5. Displacements Visualization on UMS-001 and UMS-002 Figure 6. Displacements Comparison between UMS-001 and UMS-002 The visualization of maximum displacement when the tool was fully loaded with 1200 N loads can be shown on figure 4.3. Since both of handle assumed to be fixed, the largest displacement is occurring at the end of the lower jaw. The analysis predicts that the continuously loading will trigger maximum displacement value 8,327 mm. If we take a look on the figure 3.4, UMS-001 design has an average displacement of 1,4 mm every 200 N loading even as UMS-002 that only 0,4 mm for each 200 N. This indicates the application of C-Beam can reduce the displacement up to 71,4 every 200 N loading. 1,404 2,808 4,211 5,615 7,019 8,423 0,373 0,746 1,119 1,492 1,865 2,238 1 2 3 4 5 6 7 8 9 10 0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 D is p la ce m e n ts mm Loads kN UMS-001 UMS-002 9

3.3 Safety Factor

Figure 7. Safety Factor Visualization on UMS-001 and UMS-002 Figure 8. Safety Factor Comparison between UMS-001 and UMS-002 The values of Safety Factor on UMS-001 and UMS-002 are described in figure . The red zone on the figure shows the most carrying load for design and it brings the most critical Safety Factor. On 200 N loading UMS-001 has a 2,47 Safety Factor, it still fulfill the minimum requirement ability to use. But, during the increasing of the load the amounts of Safety Factor are decreased. Based on the figure, the Safety Factor decreasing can be reduced. The correlation between load and Safety Factor on UMS- 001 can be improved about 26,5 with the application of UMS-002 design. 2,30 1,15 0,77 0,57 0,46 0,38 2,91 1,49 0,97 0,73 0,58 0,48 0,0 0,5 1,0 1,5 2,0 2,5 3,0 0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 F a cto r o f S a fe ty Loads kN UMS-001 UMS-002 10

3.4 Fatigue Check