Use Abaqus software to simulate the structure under above loading and answer to the

following tasks:

Please note:

$1-$ The unit of dimensions in figure $2$ are meters.

$2-$ Ignore the weight of structure in the analysis.

$3-$ The maximum number of nodes in your analysis should be less than $1000$ nodes.

Tasks:

$($i$)$ Perform a mesh study to select the appropriate mesh size for this analysis. You

can use the deformation of point P to develop mesh sensitivity graph. Then

provide the graph and information of appropriate mesh here.

$($ii$)$ Determine the maximum deformation of structure and where it is happening. Also

provide the contour plot of deformation in XY view.

$($iii$)$ Determine the total reaction force at joints A and B through ABAQUS. Then

determine these forces theoretically and validate your simulation results.

$($iv$)$ Develop the contour plots of von misses stress and Absolute Max Principle stress

and determine which beams in the structure are experience maximum stress. Are

those links under tension or compression? Also discuss if the maximum stress in

those beams generate any plastic strains?

$($v$)$ Now from analysis of $($iv$)$ choose $4$ beams that have higher Max Principle $($abs$)$

stress and change the beam profile in those selected beams only to a circular cross

section with radius of $0\mathrm{.}1$ m and solve the new model. Determine the maximum

displacement and maximum principle stress of the new model $($provide the contour plot for both parameters$)?$ does the maximum displacement decrease or increase? Which beams are experiencing the maximum stress now $?$ Discuss why those changes occurs?