Simple Supported Beams: Deflection at Supports?

[jnlbctln]

If i have a simple suppoted beam, let's say for example 2 supports with overhanging loads at end and/or midspan. DOES IT ALWAYS HAVE zero deflection at the support? or are there times that there is deflection at those supports?

 

[Mech_Engineer]

The definition of a "support" in a simply-supported beam bending problem is zero deflection.

 

[jnlbctln]

Thanks! :D

 

[litup]

If i have a simple suppoted beam, let's say for example 2 supports with overhanging loads at end and/or midspan. DOES IT ALWAYS HAVE zero deflection at the support? or are there times that there is deflection at those supports?

Two things come to mind: 1) if the ground support for the supports give or 2) if the support structure gets somewhat crushed by the weight. Other than that, you assume the support structure does not give.

 

[OldEngr63]

By definition, a support is assumed to be rigid unless something else is said about it. In reality, we know that nothing is truly rigid, and if you think support flexibility is a significant aspect of your problem, you should model the support as a spring (possibly non-linear, if you want to get fancy) to take flexibility into account. This usually complicates problems significantly, and is usually avoided if at all possible.