Ceiling-mounted bicycle lift structural analysis
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==Part # 001: Ceiling Bracket== | ==Part # 001: Ceiling Bracket== | ||
{| class="wikitable" border="0" | {| class="wikitable" border="0" | ||
| - | |- | + | |- align="left" |
| - | ! | + | ! Images !! Calculations !! |
|- align="left" | |- align="left" | ||
| [[Image:Team1-Bracket.jpg|300px]] || '''Material''': Carbon steel<br /> | | [[Image:Team1-Bracket.jpg|300px]] || '''Material''': Carbon steel<br /> | ||
| Line 20: | Line 20: | ||
Maximum x-bending stress: 9.47 N/mm<sup>2</sup> = 9.47 Mpa<br /> | Maximum x-bending stress: 9.47 N/mm<sup>2</sup> = 9.47 Mpa<br /> | ||
|- align="left" | |- align="left" | ||
| - | | [[Image:Team1-Stress-Bracket.JPG|300px]] || Bending along Z-axis<br /> | + | | [[Image:Team1-Stress-Bracket.JPG|300px]] || '''Bending along Z-axis'''<br /> |
Distance between support forces: 70 mm<br /> | Distance between support forces: 70 mm<br /> | ||
Vertical centroid: -.066 mm (measure from top surface)<br /> | Vertical centroid: -.066 mm (measure from top surface)<br /> | ||
| Line 28: | Line 28: | ||
Maximum z-bending stress: 3.4 N/mm<sup>2</sup> = 3.4 Mpa<br /> | Maximum z-bending stress: 3.4 N/mm<sup>2</sup> = 3.4 Mpa<br /> | ||
<br /> | <br /> | ||
| - | Maximum net bending stress: 10.1 Mpa<br /> | + | '''Maximum net bending stress: 10.1 Mpa'''<br /> |
| + | |} | ||
| + | '''Stress Concentration Factor'''<br /> | ||
| + | h = 1.22 mm (sheet thickness)<br /> | ||
| + | w = 50 mm (section width)<br /> | ||
| + | d = 6 mm (hole size)<br /> | ||
| + | <br /> | ||
| + | d/w = .12 d/h = 5<br /> | ||
| + | K = 1.7 - From table A-15-12 of (Shigley, Mechanical Engineering Design)<br /> | ||
| + | <br /> | ||
| + | '''<big>Actual Maximum Stress = 17.1 Mpa<br /></big>'''<br /> | ||
| + | <br /> | ||
| + | |||
| + | ==Part # 002: U-Pulley Mount== | ||
| + | {| class="wikitable" border="0" | ||
| + | |- align="left" | ||
| + | ! Images !! Calculations !! | ||
| + | |- align="left" | ||
| + | | [[Image:Team1-UPulley.jpg|300px]] || '''Material''': Carbon steel<br /> | ||
| + | E = 202,700 N/mm<sup>2</sup><br /> | ||
| + | Yield strength = 350 Mpa<br /> | ||
| + | <br /> | ||
| + | '''Loads'''<br /> | ||
| + | P/2 = 111.2 N<br /> | ||
| + | P/4 = 55.6 N<br /> | ||
| + | |- align="left" | ||
| + | | [[Image:Team1-FBD-UPulley.JPG|300px]] || '''Bending along X-axis'''<br /> | ||
| + | Distance between support forces: 200 mm<br /> | ||
| + | Vertical centroid: -7.57 mm (measure from top surface)<br /> | ||
| + | Second moment of area about centroidal axis: 3510 mm<sup>4</sup><br /> | ||
| + | Maximum bending moment: 5,560 N*mm<sup>2</sup><br /> | ||
| + | <br /> | ||
| + | Maximum x-bending stress: 9.47 N/mm<sup>2</sup> = 9.47 Mpa<br /> | ||
| + | |- align="left" | ||
| + | | [[Image:Team1-Stress-UPulley.JPG|300px]] || '''Bending along Z-axis'''<br /> | ||
| + | Distance between support forces: 70 mm<br /> | ||
| + | Vertical centroid: -.066 mm (measure from top surface)<br /> | ||
| + | Second moment of area about centroidal axis: 37.8 mm<sup>4</sup><br /> | ||
| + | Maximum bending moment: 1,946 N*mm<sup>2</sup><br /> | ||
| + | <br /> | ||
| + | Maximum z-bending stress: 3.4 N/mm<sup>2</sup> = 3.4 Mpa<br /> | ||
| + | <br /> | ||
| + | '''Maximum net bending stress: 10.1 Mpa'''<br /> | ||
|} | |} | ||
'''Stress Concentration Factor'''<br /> | '''Stress Concentration Factor'''<br /> | ||
Revision as of 00:33, 8 March 2007
Part # 001: Ceiling Bracket
| Images | Calculations | |
|---|---|---|
 | Material: Carbon steel E = 202,700 N/mm2 | |
 | Bending along X-axis Distance between support forces: 200 mm | |
 | Bending along Z-axis Distance between support forces: 70 mm |
Stress Concentration Factor
h = 1.22 mm (sheet thickness)
w = 50 mm (section width)
d = 6 mm (hole size)
d/w = .12 d/h = 5
K = 1.7 - From table A-15-12 of (Shigley, Mechanical Engineering Design)
Actual Maximum Stress = 17.1 Mpa
Part # 002: U-Pulley Mount
| Images | Calculations | |
|---|---|---|
 | Material: Carbon steel E = 202,700 N/mm2 | |
 | Bending along X-axis Distance between support forces: 200 mm | |
 | Bending along Z-axis Distance between support forces: 70 mm |
Stress Concentration Factor
h = 1.22 mm (sheet thickness)
w = 50 mm (section width)
d = 6 mm (hole size)
d/w = .12 d/h = 5
K = 1.7 - From table A-15-12 of (Shigley, Mechanical Engineering Design)
Actual Maximum Stress = 17.1 Mpa
