Truss Analysis $($Group Project $-4$ members$/$group max$)$

Final report $($one per group$)$ should only include:

$1-$ A short introduction about your chosen design $(10$ lines max$)$

$2-$ All sketches and CAD Drawings $($properly dimensioned$)$

$3-$ Detailed hand calculations and computer output $($forces in all members$)$

Task $-$ To analyse a truss

The truss should be $30cm$ in length in length and no more than $20cm$ in height. You are required to perform a detailed

structural analysis on the components of your trusses. You will also be required to model the truss to scale on $3$D $($software

of your choice$)$ modeling software and supply detailed engineering drawings. A truss is a structure that consists of members

joined together at their endpoints. When designing and analyzing a truss structure that is to be subjected to a given load the

forces that each member and joint of the structure will undergo under the application of the load, must first be determined.

Each truss member acts as a two$-$force member and therefore the forces at the ends of the member must be directed along

the axis of the member. If the force tends to pull away from the ends of the member it is a tensile force $(T),$ meaning it

undergoes tension. If the force tends to push into the member, it is compressive force $($C$),$ meaning it undergoescompression.

When analyzing the forces on the truss as an entire system the forces experienced by each individual member are considered

to be internal with respect to the entire system, therefore a separate method must be used to determine the forces applied to

each member.

Keep these couple basic assumptions in mind during the analysis:

All joints are pinned

All members are two$-$force members

All loading is applied at the joints

Requirements

Your model should be exactly $30cm$ in length and no more than $20cm$ in height

Should have at least $10$ members

Should have equal support reactions when a weight is applied $10cm$ from one of the supports $($rollers or pins$)$

Calculations of forces in all members and the reactions should be based on a $20N$ load placed $10cm$ from one of the supports

Including zero force members is allowed as long as you are aware of the following:

They might make the truss shorter than $30cm$ long

They might make the number of members less than $10$

Material used in the design is balsa wood $($square cross$-$section $\frac{1}{4}\frac{1}{4}$ inch$)-$ will not make a difference on the static analysis

Only one point load is to be applied

Load cannot not be applied at an angle $($vertical or horizontal only$)$

Supports cannot be on inclined surface $($horizontal or vertical surfaces only$)$

Members cannot overlap

Deliverables for ENGI $1203$

Report must include:

A short introduction

All hand sketches

Computer drawings $($properly dimensioned, no need for Multiview$)$

Detailed analysis of the final design $($hand calculations and a table of the computer calculated forces$)$

SolidWorks is the only $3$D CAD Software permitted