For truss ABC, calculate the following:

Before analyzing the problem, guess which point $K,L,$ or $M^3$ will have the greatest ${}_{\text{m}\text{a}\text{x}}.($NOTE:

There is no right or wrong answer, just write down your best guess.$)$

Neutral axis and second moment of inertia for the cross$-$sectional shape shown in Section D$-$D$,$

which is immediately to the left of the mid$-$span of beam $AB$;

Shear and bending diagrams for beam $AB$;

Draw initial stress elements for points $K,L$ and $M.$ Your initial stress elements should be

aligned to the coordinate system you assign to the truss.

Calculate ${}_{\text{a}\text{v}\text{g}},,$ and ${}_{\text{m}\text{a}\text{x}}$ values and sketch ${?}^4$ Mohr's circles for points $K,L,$ and $M.$

Of $K,L,$ and $M,$ which point has the largest ${}_{\text{m}\text{a}\text{x}}?$

Answer

$y_c=65\mathrm{.}4mm$

$I_{xx}=7\mathrm{.}19{10}^{6}m{m}^4$

$A=1962\mathrm{.}29m{m}^2$

This is a combined stress problem. Be

sure your answer considers multiple types

of stress.