# Plotting a Beam Deflection Graph

• stackemup
In summary, the beam experiences zero deflection at the point of support, and then experiences a bending moment as it is stepped out along the beam.f

## Homework Statement

I need to plot a graph showing the deflection of the beam across its length giving a value of x at every 1m.
The youngs modulus for the beam is 210 GNm^-2 and the moment of inertia is 54 X 10^-7 m^4

## Homework Equations

Really unsure where to start on this one.

I have found the equation M/IE= (d^2 y)/(dx^2) but I am unsure where to go from here

## The Attempt at a Solution

#### Attachments

• Beam.pdf
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anyone

## Homework Statement

I need to plot a graph showing the deflection of the beam across its length giving a value of x at every 1m.
The youngs modulus for the beam is 210 GNm^-2 and the moment of inertia is 54 X 10^-7 m^4

## Homework Equations

Really unsure where to start on this one.

I have found the equation M/IE= (d^2 y)/(dx^2) but I am unsure where to go from here

## The Attempt at a Solution

Do you know how to calculate M for the beam with the given loading?

I have calculated the bending moments at 1m intervals but I am not sure about calculating the internal moment?

I have calculated the bending moments at 1m intervals but I am not sure about calculating the internal moment?
It's not clear what you mean by 'internal moment'. The M which determines the deflection of the beam is the bending moment.

In that case, to answer your question, yes i know how to calculate the bending moment(s) of the beam.

SteamKing, can you please advise where I need to progress to from this?

SteamKing, can you please advise where I need to progress to from this?
You are asked to plot a graph. Does mean you are expected to do this numerically, rather than by solving a differential equation? I'll assume so.

Starting at the point of support (x=0), you have zero deflection and zero gradient.
You can use the equations you have to find the bending moment there, and hence find (d^2 y)/(dx^2).
If you now step out a distance dx along the beam, what would you estimate y and dy/dx to be there?

I have now found the solution. Thanks for the help.