Present research focuses on finite element based fatigue life prediction of lower suspension arm subjected to non-uniform varying loads. Primary objectives of this research work are to predict fatigue life of the lower suspension arm using Strain-life approach and to discover suitable materials for the suspension arm. The CAD model of lower suspension arm is developed using CAD tool - ProE (Wildfire4.0); later it is transferred to Ansys 12.1, where finite element analysis for fatigue life analysis was performed employing the Strain-life approach subjected to various load cases. 1. Introduction Suspension system is used to absorb shocks and jerks from road or rough terrain. Suspension allows wheel to move independently to the body. Suspension components, wheel rims and brake components are known as un-sprung masses, which is important for better ride quality as well as it is meant to reduce the total vehicle weight. Comfort can be achieved by isolating the riders from road disturbances like bumps or potholes and Control is achieved by keeping car body from rolling and pitching, and maintaining good contact between road to tyre. From recent technological research it is observed that most of the component fails due to the fatigue. Hence our efforts have focused on Fatigue analysis of automobile components. In today’s competitive environment it is very crucial task to produce lighter; cheaper and more efficient automotive components. In engineering design of any component, analysis of structural aspects is to be done at early stage to reduce the development time and cost. Dr. S.S. Khandare et. Al [1] explained that finite Element analysis is important tool for analyzing structural design, it helps to determine critical region of the... ... middle of paper ... ...ing for boundary representation most of solids model imported from CAD systems. Figure 2 shows the meshed model of lower suspension arm with 2.4 mm of mesh size and 10node Tetrahedron element (TET10) were considered for the analysis. Results depicted here clears that Lateral curb (kerb) limit is the highest loading condition. From the analysis of lower suspension arm it is concluded that Al alloy (Al 7075-T6) will give comparative higher fatigue life then EN19. Weight of the component made up from Al Alloy (Al 7075-T6) is substantially reduced; the percentage reduction in weight is almost 60% by using Al alloy Lower suspension arm without affecting fatigue strength of the component. Hence, Al alloy (Al 7075-T6) will give higher life with reduced weight. Further research work can be carried out to optimize the size and weight of Lower Suspension Arm of a sedan car.
Cappa, John, Sean Holman, and Ken Brubaker. "Automobiles- Springs and Suspension." Fourwheeler. NC WiseOwl, May 2012. Web. 17 Feb. 2014. .
Elastic strain region at small and big end of connecting rod is shown in figure no. 10. The maximum and minimum equivalent strain values are 0.00033975 and 2.1407e-10 respectively. Due to applied pressure there will be change in original dimensions of the connecting rod and hence strain developed can be
Since the invention of the automobile, there have been many great innovations within the industry. The suspension of the automobile serves as a good example of one of those innovations. Could you imagine riding around in your brand new Nissan Skyline GT-R, with the same suspension methods used to stabilize old horse and carriage buggies centuries ago? That would not serve its purpose very well. Due to the demands of society, vehicle stabilization became a priority to increase safety. Throughout the years, there have been different variations of vehicle suspension systems. For example, we have adaptive air, solid axle, and dead axle suspensions. Without the advancements made in the way we travel and transport goods, civilization could not prosper the way it has.
While designing a particular vehicle of a particular class, there are some atributes and protocols to be followed. Because the designing and the procedures change from car to car.
Mechanical Engineering 130.2 (2008): 6 - 7. Academic Search Complete. Web. The Web. The Web.
There are many different types of suspension systems that are used in cars today, and some that were discontinued due to their uselessness. One example of an older suspension system is called the swing axle suspension. This is a very old type, used in many sports cars in the 50’s, but had disappeared for about 2 decades. This was due to the weakness of the system. The handling was awful, as the camber angle can be noticeably changed by a simple bouncing motion, and the change of the static weight and body roll as the car took a corner. The only advantage to this type of system was that it could provide independent shock absorption. (Wan)
Brakes may be one of the most essential inventions in the developments of automobiles. Clearly, nothing can surpass the breakthrough of the wheel, but the brake system was a catalyst to the further developments of cars. The brake system has also evolved greatly throughout the years. Once considered one of the simplest parts of a vehicle, brakes have become one of the most complicated components in a vehicle. The scientific explanation behind a brake system is very rudimentary. Friction permits the concept of braking to occur.
In my undergraduate years, I have acquired a strong background in the fundamentals of basic mechanical engineering, having studied subjects such as Strength of Materials, Thermodynamics, Fluid Mechanics, Heat and Mass Transfer, Design of Machine Elements and Automobile Engineering. Whilst pursuing my diploma & degree courses, my interest for Automotive Engineering grew even more having learnt more on the different types of internal combustion engines, their configuration and importance. However, what I lacked was a practical understanding on these core areas of Automotive Engineering. To gain a better understandi...
Suspension and alignment are two of the most important part of our cars today. We rely on our cars to have good suspension system because our cars go through many different road conditions that can affect the way the car is driven. The alignment helps the cars maintain a correct suspension balance the cars need to be when functioning. There are many type of suspension and alignments type in our modern cars today. Without a good suspension and alignment system our modern cars could face many problems just getting around on the road. The suspension stabilizes the vehicle movement during acceleration, turning, and braking. The suspension helps eliminates the roughness of the road when driving. The suspension systems is made to maintain the vehicles correct ride high, support weight of the vehicle, maintain proper wheel alignment, keep the tires in contact with the road, control the vehicle direction of travel, and reduce the effects of shock forces.
Lift kits on trucks change the angle of the driveshaft and can cause U-joint and powertrain issues. Slamming a vehicle drastically changes the alignment angles causing the automobile to wear out tires quickly. Another difference between suspension modifications and the upgrades mentioned above is the amount of work involved in returning it to a factory original condition.
The average driver doesn’t think about what keeps their car moving or what keeps them on the road, but that’s because they don’t have to. The average driver doesn’t have to worry about having enough downforce to keep them on the road or if they will reach the adhesive limit of their car’s tires around a turn. These are the things are the car designers, professional drivers, racing pit crews, serious sports car owners, and physicist think about. Physics are an important part of every sports and racing car design. The stylish curves and ground effects on sports cars are usually there not just for form but function as well allowing you to go speeds over 140 mph in most serious sports cars and remain on the road and in reasonable control.
Good stability and handling is achieved with a combination of suspension, steering, acceleration, brakes and weight distribution.
Since then, Motor Companies have made numerous types of vehicles to fit your driving style the best including SUVs, trucks, compact cars, luxurious cars, and sedans etc. Even countries across the globe have have joined the competition such as Toyota, Nissan, and other european c...
delivering power instantly to the wheels. By providing high torque at low speeds, they give a feel
...aft for six feet stretched 2006 Hummer H2. I had to design the shaft for critical speed and its torsional strength by taking into consideration for minimal vibrations in operation at different engine speeds. I’m thankful to my Manager Mr. Ayaz Patel for believing in me and giving an opportunity to demonstrate my skills.