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2015-06-22
Event
The focus of the Structural Analysis session is to share experiences on analyzing, testing, and developing solutions to structural noise and vibration problems from powertrain sources. Analytical modeling, experimental testing and predictive correlation are just a few of the tools used in this endeavor.
2015-06-22
Event
This session covers static and dynamic issues in the body and chassis that contribute to noise and vibration problems in vehicles. Included in this session are modal studies, measurement and analysis methods, transfer path analysis, design guidelines, and recommended practices for noise and vibration control of the body and chassis.
2015-06-22
Event
This session focuses on the development and application of analytical methods for characterizing the dynamic behavior of structural systems. Analysis methods for all structural components, subsystems and complete systems found in automotive vehicles will be considered, except for powertrain and driveline which are covered in Powertrain Structural Analysis session. Examples include (but are not limited to) body structure, chassis structure, seats and interior structures.
2015-04-21
Event
Body Engineering & Design papers cover several important areas that are related to vehicle body, including its components such as instrument panel, steering column and wheel, seats, hood, decklid, transmission cross-member, hard mounted chassis, CRFM, etc. The topics included are: Novel concepts, Analysis, Design, Testing, Predictions of strength, stiffness, and fatigue life, Various welding methods, Improvement in vehicle body quality, durability, reliability, and Performance of safety, ride & handling, NVH, aerodynamics, mass reduction, as well as fuel economy.
2015-01-14
Technical Paper
2015-26-0225
Prashant R Pawar
The tire is generally characterized on the basis of forces and moments being generated at the contact patch, which generally describes the friction potential of the tire in both longitudinal and lateral directions at different load conditions. The field conditions under which the tires perform is diverse which results in varied performance for the same product. To understand this there is a need to understand range of friction values the tire undergoes in different conditions which cannot be replicated in indoor test-rigs. The longitudinal potential of tire is the important factor in determining the acceleration and braking behaviour, so braking test was performed to measure the longitudinal slip and forces. A joint project has been undertaken between Apollo Tyres and ARAI, where both have used their technical expertise to work on tire characterization out of road test.
2015-01-14
Technical Paper
2015-26-0227
Saraf M R
Road roughness induces dynamic loads on vehicles, which cause fatigue damage as a result. Design of vehicle for durability is one of the key steps during vehicle development process. Vehicle durability is verified on test tracks, on test rigs, or, increasingly, by computer simulations. Does the test represent real-life vehicle usage? How many times should a vehicle travel over the test tracks to verify the durability? For doing this kind of analysis, it is always required to measure the vehicle response parameters such as wheel forces, axle and chassis acceleration etc. These measurement based approaches have high cost and are time consuming. As these are vehicle dependent parameters, exercises need to be repeated on each type/class of vehicle . Hence it is needed to accelerate this process using parameter which is vehicle independent i.e road profiles. This paper discuss about the methodology, process developed at ARAI for generation of 3d road profile database (in .CRG /.
2015-01-14
Technical Paper
2015-26-0229
Jibing Zhang, Sanbao Hu, Xuexun Guo, Quan Zhou
Blade Electric Vehicles (BEVs) have received more and more attention from both consumers and automotive enterprises because of their being safer, more energy-saving and environmental friendly. However, BEVs’ development and promotion have had the major challenges such as high use cost, short driving distance and safety issues since they came up initially. To overcome those difficulties, the technologies for driving cell,motor and controller have recently achieved some progresses. Besides, vehicle lightweight technology was also a valid solution for those issues above and it could be much simpler and more effective. According to previous research, in terms of reducing the body weight, the application of new materials (such as light metals and composite materials) was a well-known method whereas their high cost caused the overall increasing of BEVs’ price.
2015-01-14
Technical Paper
2015-26-0233
Marc Pinilla, Pau Kuipers
KEYWORDS – Asphalt concrete mixture, Wet Handling, Coefficient of adherence, aging procedure, Pavement durability, Binder, Additives. ABSTRACT – Asphalt specifications for a Wet Handling tracks are very stringent in the sense of Coefficient of adherence and homogeneity of this coefficient along the time. Currently, asphalt mixture pavements used in wet conditions have a very limited useful life and this keeps degrading following different patterns according to the different asphalt mixtures used. This is because of many reasons but mainly as a consequence of supporting big strains and the extreme conditions during its whole useful life submitted for having the asphalt completely deep in water for most of its live time as well as climatic weather conditions. Moreover, Wet Handling pavements should provide very specific and stable adherence values for vehicle testing during the asphalt aging evolution.
2015-01-14
Technical Paper
2015-26-0220
Sachin W. Thor, Shriniwas Chippa, Abhijit Majage
Dynamic Analysis of Outside rear view mirror of a car S. W. Thor1, S. P. Chippa1*, A. S. Majage2 1Department of Mechanical Engineering, Vishwakarma Institute of Technology, Pune 2Finite Four Technologies, Pune *Correspondence author : chippashriniwas@gmail.com Abstract:- An Automobile rear view mirror is attached at the side of the vehicle which is used to provide clear vision outside the vehicle. In the running condition of vehicle, various vibrations occur and are transferred to the mirror which may disturb driver's rear view. Since this issue is related to safety consideration, it becomes essential to minimize the vibration of mirror. Vibration analysis is very much important for the successful design and development of new parts in automobile. In present work, Vibration analysis of existing design of outside rear view mirror is investigated through numerical model using FEM. Furthermore, these results are verified through experimental work.
2015-01-14
Technical Paper
2015-26-0224
Ramsai Ramachandran, Nilesh Kumar Dehariya, Gaurav Kumar, Himanshu Agarwal, Sukhchain Singh
BIW (Body-in White) is a type of vehicle structure formed by spot welding of different sheet metal components. The BIW structure should be designed to support the maximum load potential under various performance conditions. Thus the structure should have good strength as well as stiffness. Torsion Stiffness of BIW is the amount of torque required to cause a unit degree of twist. It is often considered as a benchmark of its structural competence due to its effect on various parameters like ride, handling, lateral load distribution and NVH performance of vehicle. This paper presents a case study in which physical testing was carried out for obtaining the global torsional stiffness, simulation was carried out replicating the physical test conditions. The simulation result was found to be 94% correlated with the test results.
2015-01-14
Technical Paper
2015-26-0221
Jitesh Agrawal
In commercial Vehicles, the purpose of suspension is not only passenger's ride comfort and load carrying, but also accompanying vehicle's handling. Road profile, vehicle design and driver input contribute a lot to the vehicle behavior specially when vehicle is turning, braking and bouncing. One of the vehicle behaviors is brake steering where vehicle itself steers on braking and can be a major cause for life threatening accidents on highways and express ways. In this paper, leaf spring wind-up and vehicle behavior on braking is studied analytically, observed experimentally and characteristics were analyzed. Also, the effect of the same on design parameters is studied and thereby recommendation is derived. In analytical part of paper, various spring's wind off parameters such as Dynamic load on spring, perpendicular distance of projected twisted surface, Angle of spring wind-up, and Induced stress during braking are calculated.
2014-11-18
Standard
J1214_201411
The purpose of this SAE Recommended Practice is set guidelines for tire to wheel house and body clearances on recreational vehicles.
2014-11-11
Journal Article
2014-32-0021
Kazuhiro Ito, Yoshitaka Tezuka, Atsushi Hoshino, Keita Sakurada
Abstract In this study, we developed a simulation method for rough road running condition to reproduce the behaviors of a vehicle body and to precisely estimate the input loads to the frame. We designed the simulation method focusing on a front fork model and a rider model optimized for this type of analysis. In the suspension model development, we conducted detailed measurement of the suspension characteristics on a test bench. Based on the yielded results, the friction force, as well as the spring reaction force and the damping force, was reproduced in the suspension model. The friction of the suspension varies depending on the magnitude of the reaction force associated with bending and this effect was also implemented in the model. Regarding the rider model, the actual behavior of a rider was investigated through the recorded motion video data and used to define the necessary degrees of freedom.
2014-11-04
Magazine
2015 engines ride a technology tidal wave Powertrain engineers are diving deeper to find new ways to make light-duty power units more efficient without compromising performance. Connectivity for comfort Seat suppliers such as Continental, Johnson Controls, and Faurecia pursue 'networked' seats to enhance safety, personalization, and comfort. Assembling aluminum vehicles in volume Ford's 2015 F-150 pickup pioneers high-volume mass-production of lightweight aluminum car and truck structures.
2014-10-28
Standard
J384_201410
This SAE Recommended Practice specifies performance requirements and test procedures for the strength and location of seat belt assembly anchorages. It applies to seat belt anchorages attached to vehicle body structure or to seat assemblies in the vehicle. Design Considerations are specified in SAE J383.
2014-10-16
Video
Chrysler engineers need to make the next Jeep Wrangler, due in 2017, much lighter for better fuel economy. In this week's SAE Eye on Engineering, Automotive Engineering Senior Editor Lindsay Brooke looks at Jeep's history with aluminum and unibody construction.
2014-09-30
Technical Paper
2014-01-2446
Marc Ratzel, Warren Dias
Abstract This paper discusses the behavior of a flexible flap at the rear end of a generic car model under aerodynamic loads. A strong bidirectional coupling between the flap's deflection and the flow field exists which requires this system to be simulated in a coupled fluid-structure manner. A coupled transient aerodynamic and structural simulation is performed for a generic car model with a flexible/deformable flap at the rear end. An automatic workflow is established which generates new flap designs, derived from an initial flap design by applying a mesh deformation technology, and performs the coupled fluid-structure interaction analysis. For each shape variation, the flap's maximum displacement is monitored and used to classify the individual flap designs. This process allows for design of experiment (DOE) studies in an automated manner. Several shape variations of the flap and their impacts on the maximum deflection are investigated.
2014-09-30
Technical Paper
2014-01-2319
Iman Hazrati Ashtiani, Mehrnoosh Abedi
Abstract Road train vehicles have been applied as one of the common and efficient ways for transportation of goods, specifically hazardous liquid cargos, in different nations. These vehicles have a wide variety of lengths and towing systems such as the fifth wheel or the dolly draw-bar. Based upon specific regulations, they could be authorized to move on specific roads. In order to avoid hazard and danger in case of accidents, safety performance of a B-train vehicle as a specific type of road train vehicles is investigated in this paper. A Multi-Body Dynamic (MBD) model, which consists of a prime mover and two trailers coupled by fifth wheels, are simulated in the initial phase of the study. The developed dynamic model is capable of simulating required tests as well as the SAE lane change, along with a constant radius turn for the purpose of roll and yaw stability analysis and safety evaluation. The effects of variation of the fluid fill level are considered in this research.
2014-09-30
Journal Article
2014-01-2308
Zhigang Wei, Shengbin Lin, Limin Luo, Litang Gao
Road vibrations cause fatigue failures in vehicle components and systems. Therefore, reliable and accurate damage and life assessment is crucial to the durability and reliability performances of vehicles, especially at early design stages. However, durability and reliability assessment is difficult not only because of the unknown underlying damage mechanisms, such as crack initiation and crack growth, but also due to the large uncertainties introduced by many factors during operation. How to effectively and accurately assess the damage status and quantitatively measure the uncertainties in a damage evolution process is an important but still unsolved task in engineering probabilistic analysis. In this paper, a new procedure is developed to assess the durability and reliability performance, and characterize the uncertainties of damage evolution of components under constant amplitude loadings.
2014-09-30
Journal Article
2014-01-2315
John Anderson
Abstract This paper describes the development and testing of a Dynamic Vibration Absorber to reduce frame beaming vibration in a highway tractor. Frame beaming occurs when the first vertical bending mode of the frame is excited by road or wheel-end inputs. It is primarily a problem for driver comfort. Up until now, few options were available to resolve this problem. The paper will review the phenomenon, design factors affecting a vehicle's sensitivity to frame beaming, and the principles of Dynamic Vibration Absorbers (AKA Tuned Mass Dampers). Finally, the paper will describe simulation and testing that led to the development of an effective vibration absorber as a field fix.
2014-09-30
Technical Paper
2014-01-2411
Marc Auger, Larry Plourde, Melissa Trumbore, Terry Manuel
Abstract Design of body structures for commercial vehicles differs significantly from automotive due to government, design and usage requirements. Specifically, heavy truck doors are not required to meet side impact requirements due to their height off the ground as compared to automobiles. However, heavy truck doors are subjected to higher loads, longer life, and cannot experience permanent deformation from overload events. Aluminum has been used intensively in commercial vehicle doors and cab structures for over 50 years by several different manufacturers in North America. It has been only in the last few years that aluminum has appeared in automotive door structures other than in high-end luxury vehicles. Commercial vehicle customers are expecting the same features found in premium automobiles resulting in opportunities to learn from each other's designs. In order to optimize the strength and weight of a commercial vehicle door, a new aluminum intensive structure was developed.
2014-09-30
Standard
AIR1673B
Manufacturers/designers of all aircraft equipped with a pallet/container capability have provided a means of linking the ground loaders/elevators with the aircraft sill for the smoother transfer of pallets and containers into or out of the aircraft holds. Use of the aircraft attachment points may be used as a means of averting damage to the aircraft door frames and other important parts. Latch-on guarantees fore and aft and vertical alignment of the loader bed with the aircraft doorway, when used in conjunction with the appropriate ground equipment. This SAE Aerospace Information Report (AIR) has been prepared by SAE Subcommittee AGE-2A to present a review of the current range of aircraft attachment points on wide body aircraft and those narrow body aircraft with a ULD cargo capability. Airline operators, who utilized these facilities, have been faced with a growing number of adaptor bars necessary to suit each type of aircraft and door position.
2014-09-16
Magazine
All the right connections With 2013 sales of $6.8 billion, Dana is a leading tier one supplier. Ian Adcock catches up with its chief technical and quality officer George Constand. Jaguar's lightweight challenger Ian Adcock uncovers the secrets that make the XE saloon, Jaguar's most important car yet. Boxing clever How composite crashboxes save weight and cost
2014-08-21
Standard
AS5239B
Scope is unavailable.
2014-08-21
Standard
AS5240B
Scope is uanvailable.
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