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Type: Posts; User: andrew_spencer

1. ## Thread: Clamping unit wanted

by andrew_spencer
Replies
1
Views
714

### These notes should get you started on the right...

These notes should get you started on the right track to determining the requirements for whatever you use to replace the screws in your flange.
...
2. ## Thread: Flexing of steel plate

by andrew_spencer
Replies
3
Views
1,208

### You mean 20 tons of force by the way. And, simple...

You mean 20 tons of force by the way. And, simple plate deflection formulas do not take edge effects into account. I'm assuming that what you're really trying to ask, is, how thick does the plate...
3. ## Thread: L metal and section modulus

by andrew_spencer
Replies
1
Views
1,209

### Well for a given beam shape the moment of inertia...

Well for a given beam shape the moment of inertia I is constant. Your loading scenario, which you know, determines the distance y from the neutral axis to the extreme fiber. So, section modulus I/y...
4. ## Thread: Finding thermal contact resistance of a cold plate

by andrew_spencer
Replies
1
Views
1,111

### The value for Rc will vary greatly depending on...

The value for Rc will vary greatly depending on how the copper and aluminum are in contact, and whether the aluminum is oxidized/anodized or polished. How is the copper tube attached to the aluminum?...
5. ## Thread: Roof tank height limit

by andrew_spencer
Replies
3
Views
1,116

### If it's water in the tank at 75 m then the water...

If it's water in the tank at 75 m then the water pressure in a communicating pipe at the ground is 735 kPa (107 psi), which is within the typical range of 35 - 150 psi at the supply to most...
6. ## Thread: Formula for Bending a Rod in the Elastic Range Around a Radius

by andrew_spencer
Replies
1
Views
1,464

I think what you need to answer your question is the proper application of Timoshenko beam theory. The beam equations we engineers are most familiar with (Euler-Bernoulli) neglect shear strain and...
7. ## Thread: Air bending force calculation

by andrew_spencer
Replies
9
Views
9,191

### Here is an expression for the maximum press force...

Here is an expression for the maximum press force F needed to air bend a sheet of length L and thickness t using a V die with an opening width W:

F=1.33*T*L*(t^2)/W

T is the tensile strength of...
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