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| report [2024/06/25 22:19] – [7.3.1 Structure] team5 | report [2024/06/25 22:21] (current) – [7.3.1 Structure] team5 |
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| The following Figure {{ref>flabel119}} displays an exploded view of the simplified structure of SMASHY, to deliver a better idea about its components and subassemblies. In Figure {{ref>flabel120}} those parts and subassemblies are put in order regarding there position in the exploded view and equipped with numbers, giving information about the certain assemblies. The quantity of parts is given aswell, but not all components are included, as this only serves to give a better idea about the individual parts and subassembly of the structure. | The following Figure {{ref>flabel119}} displays an exploded view of the simplified structure of SMASHY, to deliver a better idea about its components and subassemblies. In Figure {{ref>flabel120}} those parts and subassemblies are put in order regarding their position in the exploded view and equipped with numbers, giving information about the certain assemblies. The quantity of parts is given aswell, but not all components are included, as this only serves to give a better idea about the individual parts and subassembly of the structure. |
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| <WRAP group> | <WRAP group> |
| Used fix points are the rubber-rings that have contact with the traffic light pole, as well as the vertical component of the triangles which are strapped on, as displayed in Figure {{ref>flabel11}} below. This can be done, because the strap generates sufficient friction to hold those parts in place with the simulated loads applied. For the simulation, the ratchet straps and outer rubber-rings were removed as shown. | Used fix points are the rubber-rings that have contact with the traffic light pole, as well as the vertical component of the triangles which are strapped on, as displayed in Figure {{ref>flabel11}} below. This can be done, because the strap generates sufficient friction to hold those parts in place with the simulated loads applied. For the simulation, the ratchet straps and outer rubber-rings were removed as shown. |
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| The forces that were applied in the simulations are 1000 N from the top, a torque of 500 Nm applied around the vertical axis in the center and a force of 350N in each of the three button positions that were selected. This equals a person standing on top of the module with his bodyweight evenly distributed, another or multiple persons hitting 3 buttons at the same time with a lot of power and someone pulling it back on the side, also with a force equal to his complete weight. These 3 buttons were selected as they display the region with the biggest risk of high displacement and stress, regarding their position relative to the framework. | The forces that were applied in the simulations are 1000 N from the top, a torque of 500 Nm applied around the vertical axis in the center and a force of 350 N in each of the three button positions that were selected. This equals a person standing on top of the module with his bodyweight evenly distributed, another or multiple persons hitting 3 buttons at the same time with a lot of power and someone pulling it back on the side, also with a force equal to his complete weight. These 3 buttons were selected as they display the region with the biggest risk of high displacement and stress, regarding their position relative to the framework. |
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| The simulations were also performed with each load only by itself, aswell as in combinations with multiple loads at the same time as it’s possible that they influence themselves and result in a decrease of displacement or stress. In the following, the highest simulated deformations and stresses that resulted are presented, which occurs with all loads applied simultaneously. | The simulations were also performed with each load only by itself, aswell as in combinations with multiple loads at the same time as it’s possible that they influence themselves and result in a decrease of displacement or stress. In the following, the highest simulated deformations and stresses that resulted are presented, which occurs with all loads applied simultaneously. |
| As to be seen in the simulation shown in Figure {{ref>flabel12}}, the maximum stress does not surpass 15.02 N/mm^2 , which applies to the annotated point. The main internal structure is made of stainless steel with a yield strength of 172.34 N/mm^2. This shows that it's going to withstand the applied forces with a high factor of safety (Figure {{ref>flabel13}}). | As to be seen in the simulation shown in Figure {{ref>flabel12}}, the maximum stress does not surpass 15.02 N/mm^2 , which applies to the annotated point. The main internal structure is made of stainless steel with a yield strength of 172.34 N/mm^2. This shows that it's going to withstand the applied forces with a high factor of safety (Figure {{ref>flabel13}}). |
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| In Figure {{ref>flabel14}}, the maximum displacement is visible, which occurs on the side of the HDPE plate, equaling 0.4909mm. Regarding the fact that the forces in this simulation were applied to the edges where the buttons sit, a lower displacement can be expected in the actual model. This is because the force will be applied on the button and then to a rubber ring, which distributes the force of hitting the button on to a bigger surface area. Therefore this displacement is still acceptable. | In Figure {{ref>flabel14}}, the maximum displacement is visible, which occurs on the side of the HDPE plate, equaling 0.4909 mm. Regarding the fact that the forces in this simulation were applied to the edges where the buttons sit, a lower displacement can be expected in the actual model. This is because the force will be applied on the button and then to a rubber ring, which distributes the force of hitting the button on to a bigger surface area. Therefore this displacement is still acceptable. |
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