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2014-09-30
Technical Paper
2014-36-0304
Leonardo Navarenho de Souza Fino, Rafael Navarenho de Souza
Abstract The reliability of the microelectronic devices and circuits is a major factor that determines both their manufacturability and application lifetime. One of the most pervasive problems on the integrated circuit (IC) industry is the electrostatic discharging (ESD) failure. ESD damage has become more prevalent in newer technologies due to the higher susceptibility of smaller circuit components. In addition, the changes on the IC technology have also changed the ESD protection techniques, requiring a continuous improvements and studies. ESD causes about 40 % of IC failures and represents, annually, a loss of billions of dollars due to repair, rework, shipping, labor and overhead costs associated with the damage, which highlights the importance of fundamental understanding of ESD aspects and design of efficient ESD protection.
2014-09-30
Journal Article
2014-01-2307
Zhigang Wei, Limin Luo, Shengbin Lin
This paper reviews the correlation concepts and tools available, with the emphasis on their historical origins, mathematical properties and applications. Two of the most commonly used statistical correlation indicators, i.e., modal assurance criterion (MAC) for structural deformation pattern identification/correlation and the coefficient of determination (R2) for data correlation are investigated. The mathematical structure of R2 is critically examined, and the physical meanings and their implications are discussed. Based on the insights gained from these analyses, a data scatter measure and a dependency measure are proposed. The applications of the measures for both linear and nonlinear data are also discussed. Finally, several worked examples in vehicle dynamics analysis and statistical data analyses are provided to demonstrate the effectiveness of these concepts.
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.
2014-09-26
Article
The task facing calibrators is not getting any easier. “The complexity of calibration exploded exponentially when the Tier 4 emissions regulations were introduced,” explained Paolo Di Martino, Business Unit Director for Diesel Systems for IAV North America.
2014-09-24
Article
The use of quenched and tempered steels for dumper bodies reduces weight and fuel consumption while increasing payload capacity and wear life.
2014-09-23
WIP Standard
AMS2482E
This specification establishes the requirements for a hard aluminum oxide coating, impregnated or codeposited with polytetrafluoroethylene (PTFE) on aluminum alloys.
2014-09-23
WIP Standard
AMS2475H
This specification establishes the requirements for chromate conversion coatings on magnesium alloys. This process has been used typically to improve corrosion resistance and adherence of organic finishes but usage is not limited to such applications. The dichromate treatment may not be suitable for alloys with high manganese content. The chrome pickle treatment has been used as touch-up for previously dichromate-treated surfaces and for improving corrosion protection temporarily, but usages are not limited to such applications.
2014-09-22
Article
Internal combustion engines are poised for dramatic breakthroughs in improving efficiency with lower emissions, due in part to low-temperature combustion regimes. Such regimes show great efficiency and emissions potential, but they present optimization and control challenges.
2014-09-16
Technical Paper
2014-01-2262
Rostislav Sirotkin, Galina Susova, Gennadii Shcherbakov
Abstract Within the Russian aviation industry the necessary level of reliability risks related to the failures of aircraft mechanical parts and systems vital to the safety of flight is assured via the system of activities aimed at influencing the parameters of critical parts (CP). The goal of the system is to provide a relationship between activities aimed at prevention of dangerous failures at all phases of airplane life cycle. The system operation is regulated by the normative documents and by controlling their observance. Normative documents containing requirements and recommendations were developed about 15 years ago based on the industry experience and traditions and taking into account the requirements of AS9100 series of international standards [2] wherever possible. The documents were developed taking into account typical safety management errors outlined in [1].
2014-09-16
Journal Article
2014-01-2144
Marco Amrhein, Jason Wells, Eric Walters, Seana McNeal, Brett Jordan, Peter Lamm
Abstract Transient operating conditions in electrical systems not only have significant impact on the operating behavior of individual components but indirectly affect system and component reliability and life. Specifically, transient loads can cause additional loss in the electrical conduction path consisting of windings, power electronic devices, distribution wires, etc., particularly when loads introduce high peak vs. average power ratios. The additional loss increases the operating temperatures and thermal cycling in the components, which is known to reduce their life and reliability. Further, mechanical stress caused by dynamic loading, which includes load torque cycling and high peak torque loading, increases material fatigue and thus reduces expected service life, particularly on rotating components (shaft, bearings).
2014-09-08
Article
Additional $35 million will fund the company’s unique research center an additional five years, concentrating on a ‘safe transition’ to future of automated and connected vehicle technologies.
2014-08-18
Article
Material laws and orientation information are coupled in a single finite element analysis to predict the performance of the hybrid composite beam under a dynamic three point bending load.
2014-08-18
Article
LC411-USBH low-profile compression load cells from Omega enable 1000 readings per second and feature a USB output to connect directly to a computer.
2014-08-14
WIP Standard
AS9139
Industries, organizations, and professions are reliant upon a community of competent people and individuals that possess relevant skills and knowledge for their scope of responsibility. Traditional methods of defining requisite knowledge and skills have been based on job analysis methodologies and through the development of Subject Matter Expert (SME) BoKs. While job analysis methodologies may suffice at a micro-level, they offer little value to the profession and industrial communities. Furthermore, SME developed BoKs are inherently limited to the knowledge and experience by the individuals serving as SMEs.
2014-08-13
Article
Model 3340 G-Logger three-channel, portable data acquisition system from Silicon Designs, Inc. (SDI) offers powerful Fast Fourier Transform (FFT) analysis and display, as well as real-time acceleration and GPS data collection and viewing, all within the same compact package.
2014-08-12
Article
AC17 test reporting begins in 2015. Initially it "gifts" applicable CAFE A/C efficiency credits, but leads to mandatory use. Industry also looks to reduce A/C-induced EV range loss from solar loading using films, glass, pre-ventilation.
2014-08-12
Article
Johnson Controls has opened a new crash test facility at its automotive seating headquarters in Plymouth, MI. One of the highlights of the facility is a Seattle Safety ServoSled that allows the automotive supplier to offer what it claims is the most accurate, standardized safety testing of seats globally through collaboration with its other testing facilities located in Burscheid, Germany; Changchun and Shanghai, China; and Yokohama, Japan.
2014-08-07
WIP Standard
J1739
This FMEA Standard describes Potential Failure Mode and Effects Analysis in Design (DFMEA) and Potential Failure Mode and Effects Analysis in Manufacturing and Assembly Processes (PFMEA). It assists users in the identification and mitigation of risk by providing appropriate terms, requirements, ranking charts, and worksheets. As a Standard, this document contains requirements "must" and recommendations "should" to guide the user through the FMEA process. The FMEA process and documentation must comply with this Standard as well as any corporate policy concerning this Standard. Documented rationale and agreement with the customer is necessary for deviations in order to justify new work or changed methods during customer or third-party audit reviews.
2014-08-04
Article
HBM Inc.’s new industrial measurement amplifier enables users to make precise, dynamic measurements of raw and filtered torque, frequency, pulse, speed, and angle of rotation.
2014-08-04
Article
The SAB 32 shield connection clip from Conta-Clip provides a quick, simple connection when cables require shielding from interference.
2014-08-04
Article
The R&S SMW200A high-end vector signal generator from Rohde & Schwarz supports frequencies up to 20 GHz.
2014-08-04
Article
Sonoscan’s AW322 200 automated system for ultrasonic inspection of MEMS wafers images and identifies internal gap-type defects down to 5µm in size.
2014-08-04
Article
The Model XLUS88 subminiature, bidirectional tension/compression load cell from tecsis LP operates from 150 g to 1000 lb.
2014-07-30
Article
The Electric Power Research Institute has announced a collaboration with 8 automakers and 15 utilities to develop and demonstrate an open grid integration platform for plug-in electric vehicles (PEVs).
2014-07-29
Article
To develop an electric powertrain with a minimum noise level and minimized whining it is necessary to have accurate CAE simulation and precise criteria to assess whining noise.
2014-07-24
Standard
J2382_201407
Scope—Traditional methods of photometry rely on the use of a goniometer to rotate the test item around two axes at right angles. This method is satisfactory for most situations but has certain disadvantages: a. Point-by-point measurements with a goniometer may be slow. With more advanced requirements, particularly for headlamps, where the entire beam pattern is of concern, isocandela measurements are becoming increasingly needed. Such testing can be very time consuming. b. For production quality assurance, the speed of a goniometer may not allow testing to keep pace with the production line if a large quantity of lamps must be sampled. c. High Intensity Discharge (HID) lamps are becoming commonly used. Such lamps are orientation sensitive, changing in both lumen output and intensity distribution when tilted. This can introduce significant inaccuracies in test results when testing is performed using a goniometer.
2014-07-23
Article
In development of an advanced test engine to demonstrate fuel-saving and emissions-reducing technologies, the EPA is using ANSYS FORTÉ CFD software, giving its engineers the ability to quickly and inexpensively make multiple design iterations.
2014-07-16
Article
Ram’s official move to adopt the SAE J2807 towing standard for validating all three (1500, 2500, and 3500) of its pickup weight classes raises the competitive bar for the industry's other pickup players. Meanwhile, Ford has engineered its latest F-450 with half the GCVW capability of a Class-8 tractor-trailer.
2014-07-15
Article
Opel recently broke ground on a €210 million expansion of its Rüsselsheim International Technical Development center (ITDC) that will be used to develop and test engines. The 36,000-m² (400,000-ft²) expansion will be completed in 2017.
2014-07-15
Article
Northrop Grumman Corp. broke ground on a new $20 million Maryland Space Assembly and Test (M-SAT) facility on its Baltimore campus adjacent to Baltimore Washington International Thurgood Marshall Airport.
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