# Tag Info

1 vote

### Strain energy, Conservative force and Potential energy

What will be the conservative force $F$ in this case, which I will be using in this $\int_1 ^2F.ds = - (U_2 - U_1)$ equation to find the potential energy? I know you know that the force is $F=-kx$ (...
• 1,159

• 20.9k
1 vote
Accepted

### Direction confusion for shear and moment when sectioning a beam

This is the first step to simplify the analytical model by applying the equivalent load concept as depicted below: Another way to examine the direction of forces at where the cantilever is cut off.
• 7,293

### Max bending moment estimate

The wing design is the art of designing for strength in the most efficient way to make the plane as light as possible, while not sacrificing the strength. The part of the wing that carries the bending ...
• 20.9k
Accepted

### Max bending moment estimate

The formula for bending stress of Circular rod, $\sigma = \pm \dfrac{32M}{\pi d^3}$, $d$ is rod diameter. Rectangular rod, $\sigma = \pm \dfrac{6M}{bh^2}$, $b$ is width, $h$ is height. The ...
• 7,293

### Can/should you support a sagging ceiling from above?

You don't seem to have an urgent problem, as the ceiling may have stayed there for a long period of time. However, according to the modern building code for attic space without storage, the 50 mm ...
• 7,293
1 vote

### Can/should you support a sagging ceiling from above?

You can use 2x10s at 48" O.C. from above and use available fasteners by Simpson or other brands to hang the 2x4d from down below. it is the common way.
• 20.9k

### Degree of Kinematic Indeterminacy

The structure is statically indeterminate to the third degree (1+2+3 = 6 unknowns - 3 equations). The degree of kinematic indeterminacy equals the number of freedom of the joints. For your case, use ...
• 7,293

### Is it valid to solve for the young's modulus required for a given critical load with Euler Columns?

Yes you can use the formula to solve for an acceptable modulus of elasticity (E) that prevents buckling. Like any mathematical formula that relates 4 variables, you can calculate any variable based on ...
• 491

### Calculations of Retaining Wall

I assume that this sketch is not up to scale otherwise this retaining wall would topple! One would need a longer and thicker toe possibly with a heal. Usually, we use the relation, \$ \ \frac{RM}{OM}\...
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