3 Some Of The Students From Question 1 Are Considering Independent Suspension For Their Version Of The Utility Traile 1 (106.5 KiB) Viewed 26 times
Question 1 is here if needed for information
3 Some Of The Students From Question 1 Are Considering Independent Suspension For Their Version Of The Utility Traile 2 (112.48 KiB) Viewed 26 times
3. Some of the students from question #1, are considering independent suspension for their version of the Utility Trailer. The system would consist of an axle Shaft, with torsion and loadings as shown in simplified sketch below. (Use Safety Factor of 2 and kw=0.35) a. Determine a suitable shaft size using 1020 Steel with properties as listed below. (show shear and moment diagrams and all calculations) b. Check the natural frequency at 1000 RPM operating speed. Do you think this is acceptable? C. Check the shaft deflection at the critical point (Beam tables on P129-133). Do you think this much deflection will cause an issue with bearing misalignment? d. Without calculating it, do you think Yielding is a probable failure mode for this shaft? BEARINGS 1020 Steel properties: Su = 61ksi Sy = 51ksi E= 30 E6 S': = 33ksi Torque (avg)=1500in.ib 10 in 10 in 10 in Load=1501b Load=9001b
1. A group of college students are designing a utility trailer for their TR project, similar to the figure below. They have determined that the fully loaded trailer + load will weigh 900 lbs, and that the empty trailer will weigh 200 lbs. Due to the requirement for a low deck height, the springs cannot deflect more than 0.75" at FULL LOAD, before the axle will contact with the frame. The students have found kæ= 0.48 and they wish to use a Safety Factor of 1.25. There are *2 springs*, each taking half of the load! Looking at spring supplier catalogs, they have found a potential spring. Spring properties: Width=1.77" Thickness = 0.55" Length = 55" Number of Leaves=4 Spring Steel properties: Su = 246ksi' Sy = 228ksi E= 30 E6 S't = 100ksi =
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