Design considerations for chassis
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This document presents design considerations for vehicle chassis, detailing their functions, types, and general requirements. It describes various chassis types including ladder frame, monocoque, and carbon fiber, each with unique structural characteristics and applications. The document also outlines general considerations for chassis design such as weight, space, manufacturability, and load resistance.
Design considerations for chassis
- 1. DESIGN CONSIDERATIONS FOR CHASSIS PRESENTED BY, MOHAMMED IBZHAN SANDESH SHETTY Tuesday, February 13, 2018 1
- 2. INTRODUCTION : • Chassis is the significant structure which propel and control an automobile. • A skeletal frame with various mechanical parts like engine, tires, brakes, steering and axle assemblies. • Usually made of a light metal or composite plastic which provides strength needed for supporting vehicle components and load on it. Tuesday, February 13, 20182
- 3. FUNCTIONS : • Provide capability to steer the vehicle. • Provide capability to brake the vehicle safely. • Provide isolations between road and passenger. • To whithstand the centrifugal force by cornering. Tuesday, February 13, 20183
- 4. TYPES OF CHASSIS : • Ladder frame chassis: One of the oldest form of chassis that is still used by most of the SUVs till today. Resembles a shape of ladder which having two longitudinal rails interlinked by several lateral and cross braces. The lateral and cross members provides rigidity to the structure. Tuesday, February 13, 20184
- 5. Tuesday, February 13, 20185 • Backbone chassis: Has a rectangular tube like a backbone and simple in structure. Made of glass fibre is used for joining front and rear axle and responsible for the strength. Space within structure used for positioning drive shaft in case of rear wheel drive. Drive train, engine and suspensions are connected at the ends of the chassis. • Monocoque chassis: Most modern cars use this type. A single piece of frame work that give shape to the entire car and built by welding several pieces together. Demand for monocoque chassis is increased because it is suitable for robotized production
- 6. Tuesday, February 13, 20186 • Tubular space frame chassis: A 3-dimensional design employing number of circular and square section tubes. Tubes are positioned in different sections to provide mechanical strength against forces from anywhere. Tubes are welded together and form a complex structure. Very strong when compared with ladder and monocoque chassis of the same weight • Ulsab monocoque chassis: Traditional steel monocoque chassis becomes heavier than ever ,as a result car makers turned to replace steel with aluminium. More cars use aluminium in body panels. American steel manufacturers hired Porsche Engineering services to develop a new kind of steel monocoque technology calls Ultra Light Steel Auto Body (ULSAB)
- 7. Tuesday, February 13, 2018 7 • Carbon fibre monocoque chassis: Carbon fibre is the most sophisticated material using in aircrafts, spaceships and racing cars. Because of its superior rigidity to weight ratio. Several carbon fibres used in motor industry like Kelvar which has rigidity to weight ratio among them and can be found in body panels of many exiotic cars. • Aluminium space frame chassis: ASF consists of extruded aluminium sections, vacuum die cast components and aluminium sheets of different thickness. Highly stressed corners and joints and extruded sections are connected by complex aluminium die casting. 40% lighter yet 40% stiffer than contemporary steel monocoque. Its quite complex.
- 8. CHASSIS CLASSIFICATION BASED ON ENGINE LOCATION: • Engine fitted at front. • Engine fitted at back. • Engine fitted at centre. • Engine fitted at front but crosswise. Tuesday, February 13, 20188
- 9. General considerations related to chassis : Body of most of the vehicle should fulfil the following requirements: • The body should be light in weight. • It should have minimum number of components. • It should provide sufficient space for passengers and luggage. • It should withstand the vibrations while in motion. • It should offer minimum resistance to air. • It should be cheap and easy in manufacturing. • It should be attractive in shape and colour. • It should have uniformly distributed load. • It should have long fatigue life. • It should provide good vision and ventilation. Tuesday, February 13, 20189
- 10. DEPENDING ON LOAD ACTING ON CHASSIS : • Short duration load: While crossing a broken patch. • Momentary duration load: While taking a curve. • Impact load: Due to collision of the vehicle. • Inertia load: While applying brakes. • Static loads: Loads due to chassis parts. • Overloads: Beyond design capacity. Tuesday, February 13, 2018 10
- 11. THANK YOU