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## Homework Statement

what is the bending moment formula? is it related to the pure bending formula? what's that?

## Homework Equations

## The Attempt at a Solution

is the formula 1/p=M/EI?

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- Thread starter Amy54
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what is the bending moment formula? is it related to the pure bending formula? what's that?

is the formula 1/p=M/EI?

- #2

Defennder

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Defennder

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Suppose we have the situation in the picture.

We get:

[tex] EIv_{xx} = -FL+Fx [/tex]

or after two integrations:

[tex] EIv(x) =F \frac{(x-L)^3}{6} +C_1x +C_2 [/tex]

From this point on I leave it to you....

Last edited:

- #7

stewartcs

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## Homework Statement

what is the bending moment formula? is it related to the pure bending formula? what's that?

## Homework Equations

## The Attempt at a Solution

is the formula 1/p=M/EI?

Start with the Euler-Bernoulli Beam equation, and specifiy your boundary and loading conditions.

http://en.wikipedia.org/wiki/Euler-Bernoulli_beam_equation

CS

- #8

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Yes ...that's what I pointed out, didn't I?Start with the Euler-Bernoulli Beam equation, and specifiy your boundary and loading conditions.

http://en.wikipedia.org/wiki/Euler-Bernoulli_beam_equation

CS

- #9

nvn

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d(theta)/dx = M(x)/(E*I), where theta = beam rotation, and M(x) = moment as a function of x.

Amy54 wrote: "Is it related to the pure bending formula? What's that? Is the formula 1/rho = M/(E*I)?"

Nice work, Amy54. Yes, that is the pure bending formula. For small theta, d(theta)/dx = 1/rho.

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