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Viewing 1 to 30 of 7385
2015-06-22
Event
This session is dedicated to the tools and methodology involved in identifying, calculating and modifying various noise and vibration sources and paths in vehicles, aircraft and various consumer products and assist in the design and validation of noise and vibration targets
2015-06-22
Event
This session covers subjective testing and analysis related to automotive noise and vibration, usually referred to as sound quality and vibration quality. The focus is on both subjective and objective tools and methods that can be used either to design sound or vibration quality into the automotive product, or to characterize and eliminate undesired sounds or vibrations.
2015-06-22
Event
This session provides a good overview of recent innovations to SEA modeling techniques. SEA models can be used alone or together with hybrid analytical or experimental techniques to establish good comparative NVH predictions at the earliest stage of the vehicle design process. The papers of this session will describe recent advances and / or validations of SEA theory, applications, or use in conjunction with hybrid techniques for high- and mid-frequency NVH predictions.
2015-06-22
Event
This session covers the relationships between vibration and noise that can be generated throughout the vehicle. Included in this session are modal vibration studies related to noise, vibration transfer paths throughout the vehicle, and coupling of vibration and acoustical modes. Both experimental and analytical approaches are included in this session.
2015-06-15 ...
  • June 15-19, 2015 (3 Sessions) - Live Online
  • December 14-17, 2015 (3 Sessions) - Live Online
Training / Education Online Web Seminars
Design Review Based on Failure Modes (DRBFM) is a methodology focused on change management and continuous improvement. It centers on early prevention and engineering knowledge, eliminating time spent debating ranking systems, waiting for lead engineers to document and list their concerns, identifying what types of concerns are open for discussion and resolution, and brainstorming without any actionable closure. This web seminar will explain all phases of the DRBFM methodology and provide details on how to accomplish the specific steps.
2015-05-11 ...
  • May 11-22, 2015 (6 Sessions) - Live Online
  • October 19-30, 2015 (6 Sessions) - Live Online
Training / Education Online Web Seminars
Finite Element Analysis (FEA) has been used by engineers as a design tool in new product development since the early 1990's. Until recently, most FEA applications have been limited to static analysis due to the cost and complexity of advanced types of analyses. Progress in the commercial FEA software and in computing hardware has now made it practical to use advanced types as an everyday design tool of design engineers. In addition, competitive pressures and quality requirements demand a more in-depth understanding of product behavior under real life loading conditions.
2015-05-06 ...
  • May 6, 2015 (8:30 a.m. - 4:30 p.m.) - Tysons, Virginia
Training / Education Classroom Seminars
This seminar will include a review of statistical theory and present statistical methods, which are used to better select and/or analyze Tolerance Stack-ups. The Probability (RMS) Method, the Monte Carlo Simulation Technique and tolerance optimization techniques will be discussed along with guidelines on which method(s) to use in given situations. Attendees will also view a demonstration of a microcomputer Monte Carlo Simulation program that analyzes the effects of form and assembly variation on the quality of a finished product.
2015-04-23 ...
  • April 23-24, 2015 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
  • August 19-20, 2015 (8:30 a.m. - 4:30 p.m.) - Rosemont, Illinois
  • November 23-24, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
Attendees to the seminars held in conjunction with the SAE 2015 World Congress will receive COMPLETE access to Congress activities for only $55 per day. If interested, please contact our Customer Service department at +1.877.606.7323 (U.S. and Canada only) or +1.724.776.4970 (outside U.S. and Canada) to register for this special Congress daily rate. Failure Mode and Effects Analysis (FMEA) is a systematic method for preventing failure through the discovery and mitigation of potential failure modes and their cause mechanisms.
2015-04-23 ...
  • April 23-24, 2015 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
  • October 22-23, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
Attendees to the seminars held in conjunction with the SAE 2015 World Congress will receive COMPLETE access to Congress activities for only $55 per day. If interested, please contact our Customer Service department at +1.877.606.7323 (U.S. and Canada only) or +1.724.776.4970 (outside U.S. and Canada) to register for this special Congress daily rate. Engines can and do experience failures in the field in a variety of equipment, vehicles, and applications.
2015-04-22
Event
The focus of this session is the measurement and analysis of in-cylinder and port flows in research and production engines. Topics may including PIV, PTV, LDV, and fluorescent tracer measurements of velocity and turbulence characteristics and modeling analysis of engine flows.
2015-04-22
Event
This series of sessions focuses on state-of-the-art fatigue theory and advanced development in fatigue testing, material behavior under cyclic loading, and fatigue analysis methodology & research in the ground vehicle industry. Studies and discussions on innovative and improved fatigue theory/methods in will be discussed along with and engineering applications of CAE durability analysis.
2015-04-22
Event
This series of sessions focuses on state-of-the-art fatigue theory and advanced development in fatigue testing, material behavior under cyclic loading, and fatigue analysis methodology & research in the ground vehicle industry. Studies and discussions on innovative and improved fatigue theory/methods in will be discussed along with and engineering applications of CAE durability analysis.
2015-04-21
Event
This series of sessions focuses on state-of-the-art fatigue theory and advanced development in fatigue testing, material behavior under cyclic loading, and fatigue analysis methodology & research in the ground vehicle industry. Studies and discussions on innovative and improved fatigue theory/methods in will be discussed along with and engineering applications of CAE durability analysis.
2015-04-21
Event
This series of sessions focuses on state-of-the-art fatigue theory and advanced development in fatigue testing, material behavior under cyclic loading, and fatigue analysis methodology & research in the ground vehicle industry. Studies and discussions on innovative and improved fatigue theory/methods in will be discussed along with and engineering applications of CAE durability analysis.
2015-04-14
Technical Paper
2015-01-0535
Neil Bishop, Paresh Murthy, Karl A. Sweitzer, Stuart C. Kerr
It has been recognised since the 1960’s that the frequency domain method for structural analysis offers superior qualitative information about structural response; But computational and technological issues have held back the implementation for fatigue calculation until now. Recent technological developments have now enabled the practical implementation of the frequency domain approach and this paper will demonstrate this, with particular reference to the technology limitations that have been overcome, the resultant performance advantages, and accuracy.
2015-04-14
Technical Paper
2015-01-0554
Rafaa Esmaael, Vernon fernandez
An accurate prediction of elasto-plastic cyclic deformation becomes extremely important in design optimization. Which lead to a more accurate fatigue life prediction and weight savings. In this project a two-step notch root prediction method based on interpolation between linear and Neuber’s notch strain amplitude solutions is proposed. The accuracy of this method is assessed by comparing the results with the results obtained from elasto-plastic finite element analysis. Different types of steels with different yield strengths were used in this study. Notch deformation behavior under cyclic loading conditions was monitored for a double notched flat plate and a circumference notched round bar to cover plain stress and plain strain conditions. Elastic as well as elasto-plastic finite element analyses are performed.
2015-04-14
Technical Paper
2015-01-0555
Zhigang Wei
Computer aided engineering (CAE) based virtual damage and life assessment tools are now commonly used in component-level, system-level and even vehicle-level product design and validation thanks to the rapid development in computer and computing technologies. CAE simulation covers a wide variety of engineering areas such strength, fatigue related durability, noise-vibration-harshness (NVH), crashworthiness, driving stability etc. Recently, several CAE based thermal-fatigue life assessment tools have been developed and some are commercially available. However, most of these tools are deterministic in nature, therefore, cannot reflect the observed data variation and uncertainty, which are caused by many factors including the complex underlying fatigue-creep-oxidation failure mechanisms. The major obstacle to realistic life assessment is essentially the lack of reliable methodologies and associated database support.
2015-04-14
Technical Paper
2015-01-1696
Federico Perini, Kan Zha, Stephen Busch, Paul Miles, Rolf Reitz
In this work computational and experimental approaches are combined to characterize in-cylinder flow structures and local flow field properties during operation of the Sandia 1.9L light-duty optical diesel engine. A full computational model of the single-cylinder research engine was used that considers the complete intake and exhaust runners and plenums, as well as the adjustable throttling devices used in the experiments to obtain different intake swirl ratios. The in-cylinder flow predictions were validated against an extensive set of planar PIV measurements at different vertical locations in the combustion chamber for different swirl ratio configurations. Principal Component Analysis was used to characterize precession, tilting and eccentricity, and regional averages of the in-cylinder turbulence properties in the squish region and the piston bowl.
2015-04-14
Technical Paper
2015-01-0541
Zhigang Wei, Pingsha Dong
Mean stress effects in stress-life and strain-life fatigue have been systematically investigated for several materials such as steels, aluminum alloys and titanium alloys under uniaxial fatigue loading. Several engineering models or equations, such as Goodman, Morrow, Smith-Water-Topper and Walker, have been thoroughly examined, and it was found that the Walker equation with an adjustable fitting parameter gives the best results. Actually, these two-parameter (range and mean or maximum) driving force methods have been intensely studied in terms of both stress-life/strain-life fatigue and fatigue crack growth. It is generally agreed that the Walker-type relationship is the most appropriate model to describe the two-driving force fatigue with the Walker exponent reflecting the sensitivity of materials to mean stress.
2015-04-14
Technical Paper
2015-01-0545
Jeong Kyun Hong
In spite of increasing demands for quality aluminum alloy spot welds that enable lighter weight and more fuel efficiency automobiles, the fatigue evaluation procedure for these welds does not appear to be well established. In this article, the fatigue characteristics of aluminum alloy spot welds were evaluated based on experimental data and observations from the literature. In comparison with spot welds in steel alloys, aluminum alloy spot welds exhibit several significant differences including a different hardness distribution at and around the weld, different fatigue failure modes, and more. The effectiveness and applicability of the Battelle structural stress based simplified procedure for modeling and simulating automotive spot welds has been demonstrated previously by Battelle investigations.
2015-04-14
Technical Paper
2015-01-0558
Xiaobei Cheng, Xin Wang, Yang Ming, Zhang Hongfei, Ran Gao
With a focus on a heavy diesel engine,complete set of multi-field coupling methodology aimed at analyzing and optimizing for fatigue-strength of cylinder head is proposed.A detailed model of the engine consisting of both the coolant galleries and the surrounding metal components is employed in both fluid-dynamic and structural analyses to accurately mimic the influence of the thermo-mechanical load on the cylinder head and block structural reliability. This model carries out several simulating experiments like 3-dimensional CFD of in-cylinder combustion and engine cooling jacket,simulation of cylinder head temperature field which use fluid-structure interaction,stress and strain analysis under thermal-mechanical coupling conditions,and low/high cycle fatigue analysis. In order to assess a proper CFD setup useful for the optimization, the experimentally measured temperature distribution within the engine head is compared to the CFD forecasts.
2015-04-14
Technical Paper
2015-01-1697
Daniel Freudenhammer, Brian Peterson, Carl-Philipp Ding, Benjamin Boehm, Sven Grundmann
Within automotive research and design, efforts are often focused on the engine geometry design for optimization of performance and efficiency. Within spark-ignition (SI) engines, the intake and cylinder geometry play an important role in defining the in-cylinder flow, which is regarded as a key parameter influencing charge-filling, mixture preparation, and combustion [1]. An efficient optimization of the intake- and in-cylinder geometry requires knowledge of the three-dimensional flow in the entire volumetric domain. Previous measurements however, have been limited to point-wise or planar velocimetry measurements. Magnetic resonance velocimetry (MRV) is an advanced diagnostic tool to investigate average 3D flow topology within the entire measurement domain in a fast and cost-efficient way. Since optical access is not needed for data acquisition, the use of MRV is convenient in highly complex geometries for which traditional velocimetry techniques are often limited.
2015-04-14
Technical Paper
2015-01-0556
Wenkai Li, Haitao Cui, Weidong Wen, Xuming Su, Carlos Engler-Pinto
Conventional high cycle fatigue (HCF, at 75 Hz) and ultrasonic fatigue (VHCF, at 20 kHz) tests have been conducted on three cast aluminum alloys. Tests were performed in distilled water, laboratory air and different controlled humidity levels. It has been observed that for some alloys the fatigue life is dramatically affected by the environment humidity when tested in VHCF. Fractographic observations of the failed specimens demonstrated different crack propagation mechanisms under VHCF according to the humidity level. Other factors were also investigated, like the porosity level, material strength, and chemical composition of these three cast aluminum alloys. It was found that the copper content was the key factor controlling the humidity effect in ultrasonic fatigue testing of these cast aluminum alloys.
2015-04-14
Technical Paper
2015-01-0667
Kei Ichikawa
The importance of reducing road noise is increasing . Methods that enhance acoustic sensitivity and reduce the force transferred from the suspension to the body are used to reduce road noise. Reduction of body suspension mounting point compliance has been used as a method of reducing acoustic sensitivity. There were cases where this method reduced acoustic sensitivity, the road noise pressure was not reduced; this study focused on the suspension transfer force and analyzed its mechanism of change using the Transfer Function Synthesis Method. The results showed that the balance between the body suspension mounting point, suspension bush and suspension arm tip compliance is an important factor influencing the change in suspension transfer force.
2015-04-14
Technical Paper
2015-01-0534
Barry (Baizhong) Lin
A taper bolt joint is very often used in a joint between suspension knuckle and steering system tie rod. When bolt or stud is drawn into the taper hole during assembly process, it would generate contact pressure in taper surface of the bolt hole. In the design of a taper bolt joint, taper dimension in the knuckle should be carefully selected to manage contact pressure and avoid material yielding in bolt bass material. Too much material yielding or softening may result in a loose connection between knuckle and steering system and compromise vehicle safety performance. This paper will present a case study to illustrate stud surface roughness could be increased to solve a loose taper joint issue due to material yielding. In this case study some looseness was found in some taper joint assembly bench tests. Then CAE analysis results indicated knuckle material yielding or softening as a root cause.
Viewing 1 to 30 of 7385

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