All Questions
Tagged with moments mechanical-engineering
34
questions
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Harmonic drive motor output bearing specifications and bearing arrangements
I'm not a mechanical engineer, but I've been tasked with designing a system that uses a harmonic drive motor (specifically, a LynxDrive). It must rotate a 200kg mass, which is heavily off-center. It ...
0
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2
answers
46
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Do tensile and compressive stresses create moments?
Below are 3 examples I designed. My question is about the tensile and compressive stresses that occur in 3 examples under the influence of a horizontal force F=100N (earthquake force). I ask my ...
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Determine moment and shear stress door
Determine shear stress and moment of bolt:
Internal Height of Door = 198.2 cm
Internal Width of Door = 89.9 cm
Thickness Door = 3.9 cm
Weight Door = 45.76 kg or448.9 N
Elasticity = 9.8 GPa or N/mm2
...
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-1
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2
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106
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What happens if we have a rotating shaft with high RPM but very little torque?
If there are heavy components mounted on it, what will happen?
I think it accelerates very slowly, but reaches at the highest RPM at the end
because torque is equal to angular acceleration * moment ...
- 125
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1
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254
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How does a single point load cell eliminate the inluence of moment/load placement
All descriptions I have been able to find mention some variation of "due to their geometrical design single point load cells are immune to load placement" with no explanation on how is it ...
1
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2
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Calculate compressive stress in shaft/key surface from torque
When designing shaft keys we calculate compressive stress in hub/shaft/key and compare it with allowable stress. The usual formula is
$$p = \cfrac{F}{A} = \cfrac{\cfrac{M}{R}}{L_e \cdot t}$$
where $p$ ...
- 13
1
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2
answers
173
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Horizontal "pinching" force of an arch with applied moment
I have some Shape Memory Alloy wire programmed to curl from a straight beam into a circle. The force this generates is approximated as a uniform distributed bending moment along the length of the wire....
- 151
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2
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223
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Torque calculation for DIY friction wheel drive electric unicycle
I’m building a friction wheel drive electric Unicycle.
Something like this;
My question is how much torque should the friction wheel drive motor have considering the total mass of unicycle including ...
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2
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100
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Is there a way to solve this complex statics problem algebraically?
This problem can be solve in 2 ways either I solve it with vectors which would be relatively painful and more time consuming and the other faster way is algebraically but I faced a problem when trying ...
- 173
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4
answers
315
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How do you simplify this load diagram?
Very rough sketch but I'm having trouble with a Shear and Bending Moment problem, and I'm pretty new to the topic.
This is the original diagram:
I already simplified the left side (not sure if it's ...
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3
answers
727
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Find the maximum stress at a point in a machine member
A machine member having a diameter of 50 mm and a length of 250 mm is supported at one end as a cantilever subjected to different forces as shown in the figure. Find the maximum stress at points A and ...
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1
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196
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How does the diameter of a worm gear affect the amount of force needed to turn it
Can anyone help inform a discussion I'm having with fellow modellers on a model railway forum?
I have a locomotive powered by an electric motor turning a 20mm diameter worm gear meshing with a spur ...
2
votes
1
answer
206
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Rubik cube torque experiment - Correct equations and experiment set up?
Background
I am attempting to experimentally find out the average torque required to rotate a single face of a Rubik cube. Little to no data is available as it varies from cube to cube. Some people ...
- 21
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39
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Does anybody know where this calculation for the mass moment of inertia for an eighth of a circle comes from?
These attached photos describe flaps which are a portion of a circle and equations are attached as the mass moment of inertia, but there are no descriptions. I am using this for part of my research, ...
- 75
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3
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145
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Given 3 force measurements, what are estimated forces at other locations?
Given three unequal force measurements spaced equally 120 degrees apart on a circular plate at F_R, F_C, F_L, I need to calculate what the estimated force measurements would be if taken at positions ...
