Difference between revisions of "Monocoque"

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A monocoque is a fully enclosed structural chassis where the loads are supported by the skin. This could be done by either folding a sheet material (such as aluminum sandwich or sheet metal) or manufacturing components with molding a material (such as [[Carbon Fiber Reinforced Polymer|CFRP]] or [[Glass Fiber Reinforced Polymer|GFRP]]).Generally this design is seen as more challenging compared to a tube frame, but can have considerable performance and manufacturing benefits if done properly.  
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A monocoque is a fully enclosed structural chassis where the loads are supported by the skin. This could be done by either folding a sheet material (such as aluminum sandwich or sheet metal) or manufacturing components with molding a [[composite| composite material]] (such as [[Carbon Fiber Reinforced Polymer|CFRP]] or [[Glass Fiber Reinforced Polymer|GFRP]]).Generally this design is seen as more challenging compared to a tube frame, but can have considerable performance and manufacturing benefits if done properly.  
 
 
  
 
A monocoque chassis should be worked towards in increments and is not recommended to have as a chassis without proper validation or manufacturing resources. A general practice is to start with a tube frame design which meets FSAE rules and design requirements of the team, and then to add shear panels for the body. Once a team as proper experience and understanding of the chassis, they can attempt a monocoque.
 
A monocoque chassis should be worked towards in increments and is not recommended to have as a chassis without proper validation or manufacturing resources. A general practice is to start with a tube frame design which meets FSAE rules and design requirements of the team, and then to add shear panels for the body. Once a team as proper experience and understanding of the chassis, they can attempt a monocoque.
=Design=
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==Design==
=Manufacturing <br />=
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==Manufacturing==
 
Separate page on Composite manufacturing
 
Separate page on Composite manufacturing
=Analysis=
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==Analysis==
====Longitudinal Torsion====
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===Longitudinal Torsion===
 
Consider the monocoque as a cylinder with with cutouts.  
 
Consider the monocoque as a cylinder with with cutouts.  
  
 
[[File:Longitudinal Torsion.PNG|250px|right|middle|thumb|Simpilifed Longitudinal Torsion Model]]
 
[[File:Longitudinal Torsion.PNG|250px|right|middle|thumb|Simpilifed Longitudinal Torsion Model]]
  
 
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===Vertical Bending===
====Vertical Bending====
 
 
[[File:Vertical Bending.PNG|250px|right|middle|thumb|Simplified Vertical Bending Model]]
 
[[File:Vertical Bending.PNG|250px|right|middle|thumb|Simplified Vertical Bending Model]]
  

Latest revision as of 10:15, 30 March 2022

A monocoque is a fully enclosed structural chassis where the loads are supported by the skin. This could be done by either folding a sheet material (such as aluminum sandwich or sheet metal) or manufacturing components with molding a composite material (such as CFRP or GFRP).Generally this design is seen as more challenging compared to a tube frame, but can have considerable performance and manufacturing benefits if done properly.

A monocoque chassis should be worked towards in increments and is not recommended to have as a chassis without proper validation or manufacturing resources. A general practice is to start with a tube frame design which meets FSAE rules and design requirements of the team, and then to add shear panels for the body. Once a team as proper experience and understanding of the chassis, they can attempt a monocoque.

Design

Manufacturing

Separate page on Composite manufacturing

Analysis

Longitudinal Torsion

Consider the monocoque as a cylinder with with cutouts.

Simpilifed Longitudinal Torsion Model

Vertical Bending

Simplified Vertical Bending Model




Lateral Bending

Simplified Lateral Bending Model



Localized Bending

Fatigue

Need to add reference for images: Design, Analysis and Testing of a Formula SAE Car Chassis, William B. Riley and Albert R. George

Simulation

Throw it in ansys acp. Hit send



Physical

Notable Monocoque Designs

McGill Formula Electric 2019