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Viewing 1 to 30 of 3400
2017-04-06
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-06
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-06
Event
All of the engineering expertise that goes into development of cutting-edge vehicle features, whether for safety, infotainment, or vehicle performance, goes for naught if those features don’t work. Reliability is critical for every automaker. Presentations and papers at this session strive to improve the quality and effectiveness of electronic testing devices and procedures.
2017-04-06
Event
All of the engineering expertise that goes into development of cutting-edge vehicle features, whether for safety, infotainment, or vehicle performance, goes for naught if those features don’t work. Reliability is critical for every automaker. Presentations and papers at this session strive to improve the quality and effectiveness of electronic testing devices and procedures.
2017-04-05
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-05
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-04
Event
This session presents papers in testing and modeling of safety-related technologies, covering (1) improved, new and innovative full/sub-system/component physical and CAE-based test methodologies pertaining to frontal, side, and pedestrian impacts; and dummy evaluations; (2) Calculation algorithm for 3D_IRTRACC for safety research, and (3) special topics including data mining, the wagging root uncertainty, boot effect under blast loading, and a methodology for predicting periprosthetic injuries.
2017-04-04
Event
This session presents papers in testing and modeling of safety-related technologies, covering (1) improved, new and innovative full/sub-system/component physical and CAE-based test methodologies pertaining to frontal, side, and pedestrian impacts; and dummy evaluations; (2) Calculation algorithm for 3D_IRTRACC for safety research, and (3) special topics including data mining, the wagging root uncertainty, boot effect under blast loading, and a methodology for predicting periprosthetic injuries.
2017-04-04
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-04
Event
This session is focused on vehicle dynamics and controls using modeling and simulation, and experimental analysis of passenger cars, heavy trucks, and wheeled military vehicles. This session addresses active and passive safety systems to mitigate rollover, yaw instability and braking issues; driving simulators and hardware-in-the-loop systems; suspension kinematics and compliance, steering dynamics, advanced active suspension technologies; and tire force and moment mechanics.
2017-04-04
Event
Key words: residual stress, retained austenite, x-ray diffraction, neutron diffraction, induction hardening, carburizing, shot peening, quench and template, residual stress simulation, residual stress test
2017-04-04
Event
The focus of this session are the tests and test methods employed in the evaluation of the performance and durability of powertrain (engines, transmissions), driveline (4WD systems, driveshafts, axles), chassis (frame, suspensions, brakes, etc.) and body components, subsystems, and full vehicle systems.
2017-04-04
Event
The focus of this session are the tests and test methods employed in the evaluation of the performance and durability of powertrain (engines, transmissions), driveline (4WD systems, driveshafts, axles), chassis (frame, suspensions, brakes, etc.) and body components, subsystems, and full vehicle systems.
2017-03-28
Technical Paper
2017-01-0331
Qiuren Chen, Haiding Guo, Katherine Avery, Xuming Su, HongTae Kang
Fatigue crack growth tests have been carried out to investigate the mixed mode fatigue crack propagation behavior of an automotive structural adhesive BM4601. The tests were conducted a compound CMM (Compact Mixed Mode) specimen under load control with 0.1 R ratio and 3Hz frequency. A long distance moving microscope was employed during testing to monitor and record the real time length of the fatigue crack in the adhesive layer. The strain energy release rates of the crack under different loading angles, crack lengths and loads were calculated by finite element method. The pure mode I and mode II tests show that an equal value of mode I strain energy release rate results in over ten times higher FCGR (Fatigue Crack Growth Rate) than the mode II stain energy release rate does. The mixed mode tests results show that under a certain loading angle, the mixed mode FCGR is changed by changing the load, which is contrary to the find in pure mode I and mode II tests.
2017-03-28
Technical Paper
2017-01-0371
Raju Gandikota, Amit Nair, Kurt Miller
Testing elastomeric materials that undergo large strains pose challenges especially when establishing failure criteria. The failure criterion for composites and polymers based on finite elasticity published byFeng (1) requires testing under uni-axial and bi-axial stretching modes. The classic inflation of a circular disk for bi-axial stretch mode poses stability and safety challenges. The test can also be sensitive to end constraints resulting in failure of materials at the constraints. Bi-axial stretching with a hemispherical punch is explored in this work. The bi-axial stretching allows controlled and repeatabletesting. It establishes clear and reliable failure mechanism of the material at the poles. Through a combination of testing and numerical methods, the stretch ratios and its relation to failure has been established.
2017-03-28
Technical Paper
2017-01-1554
Ajith Jogi, Sujatha Chandramohan
Over the years, commercial vehicles, especially tractor-semitrailer combinations have become larger and longer. With the increasing demand for their accessibility in remote locations, these vehicles face the problem of off-tracking, which is the ensuing difference in path radii between the front and rear axles of a vehicle as it maneuvers a turn. Apart from steering the rear axle of the semitrailer, one of the feasible ways of mitigating off-tracking is to shift the fifth wheel coupling rearwards. However, this is limited by the distribution of the semitrailer’s load between the two axles of the tractor; any rearward shift of the fifth wheel coupling results in the reduction of the total static load on the tractor’s front axle and hence available traction. This may in turn lead to directional instability of the vehicle. In the present work, a new model of the fifth wheel coupling is proposed which the authors call Split fifth wheel coupling (SFWC).
2017-03-28
Technical Paper
2017-01-1672
Siddartha Khastgir, Gunwant Dhadyalla, Stewart Birrell, Sean Redmond, Ross Addinall, Paul Jennings
The advent of Advanced Driver Assistance Systems (ADAS) and autonomous driving has offered a new challenge for functional verification and validation. The explosion of the test sample space for possible combinations of inputs needs to be handled in an intelligent manner to meet cost and time targets for the development of such systems. Various test methods like VEHiL (Vehicle Hardware-in-the-Loop), Vehicle-in-the-Loop and Co-ordinated automated driving have been developed for validation of ADAS and autonomous systems. Increasingly, driving simulators are being used for testing ADAS and autonomous systems as they offer a safer and a more reproducible environment for verifying such systems. While each of these test methods serves a specific purpose, they have a common challenge between them. All of these methods require the generation of test scenarios for which the systems are to be tested.
2017-03-28
Technical Paper
2017-01-0398
Robert A. Smith, Allison Ward, Daniel Brintnall
Utilization of TGA Flynn-Wall and Arrhenius Analysis for Rapid Prediction of Automotive PVC Cable Performance Robert Alan Smith, Allison Ward, and Daniel D. Brintnall Delphi Electrical/Electronic Architecture 4551 Research Parkway Warren, Ohio 44483 Poly(vinylchloride), PVC, insulated cable was first used in automobiles in the 1940’s when the average vehicle contained 40 meters of wiring. Presently, the Bentley Bentayga has a wiring harness that weighs 110 lbs! Indeed, the electrical systems of automobiles have become much more complicated than just provision of lighting, signaling, and heat with the evolution of climate control, infotainment and data delivery systems. Due to low cost and light weight, PVC insulated cable is still the most widely used cable in automobiles and is found predominantly in non-engine compartment applications limited by an upper use temperature of 80◦ C.
2017-03-28
Technical Paper
2017-01-0484
Harchetan Singh Aneja, Harmeet Singh, Aashish Parmar, Rohan Sharma
The automotive industry, known for its competitiveness & innovations globally, researches for continuous improvement of part performances along with reduction of cost & weight. These are amongst the top priority goals across all OEMs. In the long list of automobile parts, pipe clamps have paved their way of design through generations from being of metal to plastic that has expanded its scope of application & performance. In an automobile, plastic clamps are widely used to hold single or multiple water, fuel or brake pipes of various diameters to vehicle body at various locations such as underbody (prone to stone chipping) or engine room (prone to high temperatures), etc. Plastic clamps are preferred over metallic clamps for their cost, weight, performance & productivity. Primarily, in all application areas, a clamp must be able to hold the pipes with consistent & sufficient performance that is quantified through parameters such as thrust force and pipe removal force.
2017-03-28
Technical Paper
2017-01-1028
Daniel Bharathy, Ganesh Paramasivam
Venting for a diesel tank is an essential requirement to keep the tank stable by breathing in during suction & breathing out the excess pressure created inside because of vaporization. Vent valves with inappropriate specs affects the rate of supply of fuel during vacuum built up of pressure resulting in tank explosion or causes damage to the user during filling. Capacity of the tank, ambient temperature, environment, Return line temperature and application are the factors contribute in finalizing the venting specification. Considering these factors, study has been done on a metal & plastic fuel tank for a commercial vehicle application. Venting specification has been finalized for both plastic & metal tanks analytically. Vent valves developed and validated to meet the functional & durability requirements.
2017-03-28
Technical Paper
2017-01-1575
Andrei Keller, Sergei Aliukov, Vladislav Anchukov
Trucks are one of the most common modes of transport and they are operated in various road conditions. As a rule, all-wheel drive trucks are equipped with special systems and mechanisms to improve their cross-country capability and overall efficiency. The usage of blocked mechanisms for power distribution is one of the most popular and effective ways to improve the off-road vehicle performance. However, the lock of differential may adversely affect the stability and control of vehicle because of the unobvious redistribution of reactions acting on wheels, which consequently leads to poor performance and safety properties. Problems of rational distribution of power in transmissions of all-wheel drive vehicles, as well as research in the field of improving directional stability and active safety systems are among the priorities in modern automotive industry.
2017-03-28
Technical Paper
2017-01-0400
Theo Rickert
Hole drilling is a very common technique for measuring residual stresses. Adding an orbiting motion of the drill was found to improve hole quality in difficult to drill materials and has been in practice for decades. The orbiting motion affects the hole shape since the drilling tool cannot make a truly flat bottom unless the tool edges reach each part of the bottom, i.e. if the holes radius is twice the tool diameter. For instance, square-end end mills leave an inverted cone on the hole bottom, which has a systematic effect on the near-surface stresses unless the coefficients account for the non-cylindrical hole shape. This paper compares measurements made with tools of several sizes and different orbiting offsets and discusses the systematic effects found.
2017-03-28
Technical Paper
2017-01-0391
Daniel Meyer, Thomson Varghese, Peter Maehling, Jeffery Lewis
Precise and accurate engine internal combustion pressure measurements are typically built upon extremely low level piezoelectric sensor signals acquired in the laboratory. In turn, these minute signals must be conditioned accurately by electronic charge amplifiers then processed for meaningful analysis. Laboratory standard operating procedures often overlook the importance of timely and rigorous calibration of the equipment using sufficient environmental controls. In some facilities, years have been allowed between metrology-quality calibrations, introducing the potential for significant out-of-tolerance conditions and non-compliance to accredited measurement standards. Accurate and timely calibration supports the validity of using combustion data in engine design decisions, as well as avoiding development program timing delays, when additional unplanned testing becomes required.
2017-03-28
Technical Paper
2017-01-0380
Liang Wang, Robert Burger, Alan aloe
It occurs frequently that automotive components fail due to vibration excitations on the proving ground during their last phase of durability validation process. This leads to additional design release time, cost and even impact vehicle launch if a safety issue. The appearing cause of this issue is under-testing or lack of component level testing, however the root cause is that vibration fatigue is not considered during the design phase of the parts. This paper introduces aspects of vibration fatigues helping designer and release engineer better understand the requirements, testing methodologies available, and ideas for improving vibration fatigue for designing and validating their product. Several examples are given to introduce the fundamental but universal root cause of all the vibration fatigue failures. Typical vibration levels and frequency contents on varied area on automotive are introduced.
2017-03-28
Technical Paper
2017-01-0384
Shawn S. You
Due to the increasing pressure of shortened development cycles and the desire of saving costs, auto makers are increasingly using analysis tools to validate vehicle design and specify lab testing with less road load data acquisition. Virtual testing is a method that simulates lab testing using analysis software. This approach has been used more and more in vehicle design evaluation. The main advantages of this approach include that the design can be evaluated before a prototype is available and virtual testing results can be easily validated by subsequent physical testing. The combination of physical and virtual testing can accelerate the design process due to the identification and subsequent elimination of physical and virtual prototype deficiencies, such as transducer related errors and model parameter inaccuracies. This paper introduces a real virtual testing project.
2017-03-28
Technical Paper
2017-01-1572
Wesley Kerstens, Michael Brewer, H. Eric Tseng, Li Xu
The detection, and diagnosis, of sensor faults in real-time is necessary for satisfactory performance of vehicle Electronic Stability Control (ESC) and Roll Stability Control (RSC) systems. This paper presents an observer designed to detect faults of a roll-rate sensor that is robust to model uncertainties and disturbances. A reference vehicle roll angle estimate, independent of roll-rate sensor measurement, is formed from available ESC inertial sensor measurements. Residuals are generated by comparing the reference roll angle, and roll-rate, with the observer outputs. Stopping rules based on the current state of the vehicle and the magnitude of the residuals are then used to determine if a sensor fault is present. The system’s low order allows for efficient implementation in real-time on a fixed-point microprocessor. Modification of the roll-rate sensor signal during in vehicle experiments shows the algorithm’s ability to detect faults.
2017-03-28
Technical Paper
2017-01-1573
Andreas Carlitz, Thomas Schmitz, Sebastien allibert, Axel Engels
A twistbeam is a very cost effective rear suspension architecture which has drawbacks compared to an independent suspension. One drawback is the lateral compliance during cornering compromising handling. Common solutions to correct this issue are complex reinforcements or an additional Watts linkage. However, these solutions drive high cost and additional weight. The challenge was to find a cost efficient solution which comes close to the functional performance of an IRS. Due to the attachment by bushings, the set-up of a twistbeam is always a compromise between ride comfort and dynamic lag. The more comfort is desired, the softer the bushings will be, resulting in less agility and slower response. The goal was to determine a way to separate ride comfort and dynamic agility. A solution was found using a special set of springs working as a dynamic anti-compliance mechanism.
Viewing 1 to 30 of 3400

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