Report no 2

Design of rollcage M S NAVYADEEP (09101117)

B VIKRAM KUMAR (09101166)

Introduction

In the first report we have already mentioned the following as possible implementations that can

be made for the complete designing of structure for rollcage and its analysis

1) Design of roll cage in cad package(CATIA).

2) Optimization.

3) Impact analysis for front, side and rear impacts.

4) Crash Analysis.

5) Fatigue analysis of finding out fatigue life.

6) Vibrational analysis to find out forced frequencies.

As a part of mentioned scenario we made a step ahead and started to work on design of roll

cage and its optimization.

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Description

For building of rollcage we are following three steps

Step 1:Building the cad model of buggy with sheat metal

Fig-1In this stage we will build sheat metal body of buggy as similar to the one shown in fig-1.In

this stage the size and shape of buggy is decided by conducting CFD analysis by keeping

minimum air drag as objective.

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Step 2:optimization

In this stage we will apply the required boundary conditions (loads,constraints,max stress etc) on

the buggy shown in fig-1 after defining proper boundary conditions optimization is done using

optistruct and solidthink-inspired by defining design space and non-design space. fig-2

Fig-2

The results of optimization will be similar to the one shown in fig-2.By optimization the

maximum stress paths are traced out which will be used for development of structural rollcage.

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Step 3:Developing rollcage structure

In this stage we will use the results from optimization where we have traced out the max stress

paths and we will use bars of circular cross-section along the max stress path removing the

material from the remaining area.

Fig-3

Final model of rollcage of buggy will be similar as shown in fig-3

After developing the final model we will conduct the remaining analysis on that model

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