Your Selections

Durability
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Committees

Events

Magazine

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Characterization and Durability of Mold-In-Color Engineering Plastics

Mahindra & Mahindra, Ltd.-Sandeep Kumar Shukla
  • Technical Paper
  • 2019-28-2542
To be published on 2019-11-21 by SAE International in United States
Plastics are prone to photo oxidative and thermal oxidative degradation under usage conditions due to their chemical nature. From sustainability and cost standpoint, there is an increasing focus on Mold-In-Color (MIC) plastic materials. Simultaneously customer’s expectations on the perceived quality of these MIC parts has been increasing with attractive color and glossy appearance. A study was conducted to analyze the product quality and durability aspects over a prolonged exposure to accelerated weathering condition. Material selected for this study were injection molded specimens of ABS and PC/ABS used in automotive passenger vehicles. Comparative analysis was conducted before and after weathering exposure at defined intervals by using the various tools like Fourier Transform infra-red spectrometer (FTIR), thermogravimetric analyzer (TGA) and universal testing machine (UTM), Izod impact tester, dynamic mechanical analyzer (DMA) to understand the impact on their chemical and mechanical properties. This study will be useful in understanding material behavior, durability, performance and product quality.
new

Nondestructive Measurement of Residual Strain in Connecting Rods Using Neutrons

SAE International Journal of Materials and Manufacturing

Honda R&D Co., Ltd., Japan-Tomohiro Ikeda, Ryuta Motani, Hideki Matsuda, Tatsuya Okayama
Oak Ridge National Laboratory, United States-Bunn R. Jeffery, Christopher M. Fancher
  • Journal Article
  • 05-12-03-0018
Published 2019-10-15 by SAE International in United States
Increasing the strength of materials is effective in reducing weight and boosting structural part performance, but there are cases where the residual strain generated during the process of manufacturing of high-strength materials results in a decline of durability. It is therefore important to understand how the residual strain in a manufactured component changes due to processing conditions. In the case of a connecting rod, because the strain load on the connecting rod rib sections is high, it is necessary to clearly understand the distribution of strain in the ribs. However, because residual strain is generally measured by using X-ray diffractometers or strain gauges, measurements are limited to the surface layer of the parts. Neutron beams, however, have a higher penetration depth than X-rays, allowing for strain measurement in the bulk material. The research discussed within this article consists of nondestructive residual strain measurements in the interior of connecting rods using the Second Generation Neutron Residual Stress Mapping Facility (NRSF2) at Oak Ridge National Laboratory (ORNL), measuring the Fe (211) diffraction peak position of the ferrite…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Systematic Work Flow for Fatigue Life Prediction of Automotive Components

Mahindra & Mahindra, Ltd.-Nitin Kumar Khanna, Baskar Anthonysamy, Krishna Shettipally, Manohar Kalal
Published 2019-10-11 by SAE International in United States
Fatigue life estimation of automotive components is a critical requirement for product design and development. Automotive companies are under tremendous pressure to launch new vehicles within short duration because of customer’s changing preferences. There is a necessity to have a comprehensive virtual simulation and robust validation process to evaluate durability of vehicle as per customer usage. Test track and field test are two of the most time-consuming activities, so there is a need of simulation process to substitute these requirements. This paper summarizes the overall process of Accelerated Durability Test with measured road loads. Based on category of vehicle, type road profiles and the customer usage pattern, the wheel forces, strains and acceleration are measured which is used to derive the equivalent duty cycles on proving ground. The wheel force transducers (WFT) are used to derive loads for fatigue life estimation. A full vehicle model is prepared in ADAMS CAR and validated through Physical testing. The loads on suspension hard points extracted from the validated MBD model. These loads at various hardpoint locations, are used…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Damage Matching Criterion for Development of Accelerated Duty Cycle from Road Load Data, and Achieving Right Duty Cycle to Determine Gear and Bearing Durability

Romax Solutions-Amol Korde
Published 2019-10-11 by SAE International in United States
While designing the transmission, designer needs to have a duty cycle which is a set of load cases against which he wants to confirm the durability of the same. This is done through data acquisition by running a vehicle on various terrains and converting those data points to a concise set of load cases which we term as duty cycle. This concise set of load cases required because data acquired has millions of data points giving value of torque and RPM at every millisecond which cannot be directly used to assess the fatigue durability of gears and bearings. Converting these millions of road load data points into fewer number of load cases is always a challenge. For a transmission designer, it is being a major hurdle to determine as what is the scientific way of converting these millions of data points into a concise duty cycle. The road load data is taken for few hundred or few thousand kilometres covering enough types of terrains on which vehicle is expected to run. The methods available with…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Development of Methodology to Determine Toe Geometry of any Vehicle at Its Early Design Stage for Optimum Tyre Life

Mahindra & Mahindra, Ltd.-Nitin Kumar Khanna, Karthik Senthi, Vignesh Natarajan
Published 2019-10-11 by SAE International in United States
Toe setting is one of the major wheel alignment parameters which directly effects handling of a vehicle. Correct toe setting ensures desired dynamic behavior of an automobile like straight line stability, cornering behavior, handling and tire durability. Incorrect setting of toe during design stage significantly deteriorates tire durability and leads to uneven tire wear. In the present scenario of automotive industry, toe setting is majorly an iterative or a trial and error process which is both time consuming and involves higher development cost as there may be instances where 2 to 3 sets of iterations are needed before specification is finalized for production. Therefore, determining optimum toe setting at an early stage of a product development will not only save significant development time but it will also benefit in reducing product validation time and cost. Through this paper an attempt has been made to develop a methodology for deciding toe setting for any vehicle as a first time right approach to cut down on conventional expensive & time consuming iterative approach. In this new methodology…
This content contains downloadable datasets
Annotation ability available
new

Mobile Rugged Displays for Situational Awareness

  • Magazine Article
  • TBMG-35280
Published 2019-10-01 by Tech Briefs Media Group in United States

With the constant emergence of new display technologies in the consumer sector, it is important for program managers and engineers in the military markets to be aware of how several of these advances can be incorporated into new military programs to achieve maximum benefit. Additionally, as older programs present themselves for technological refreshes, it is imperative to understand the difference in display specifications from previous decades and how updated technology provides avenues for their evolution and continued progress.

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Roush opens Advanced Durability Lab

Automotive Engineering: October 2019

Kami Buchholz
  • Magazine Article
  • 19AUTP10_12
Published 2019-10-01 by SAE International in United States

The auto industry's steady march toward electrified and automated vehicles has many suppliers affixed to the digital-testing environment rather than using traditional hardware validation.

Annotation ability available
new

Hydrogel Adhesive Helps in Wound Healing

  • Magazine Article
  • TBMG-35347
Published 2019-10-01 by Tech Briefs Media Group in United States

Cuts, scrapes, blisters, burns, splinters, and punctures — there are a number of ways our skin can be broken. Most treatments for skin wounds involve simply placing a barrier over them (usually an adhesive gauze bandage) to keep it moist, limit pain, and reduce exposure to infectious microbes, but do not actively assist in the healing process. A new, scalable approach to speeding up wound healing has been developed based on heat-responsive hydrogels that are mechanically active, stretchy, tough, highly adhesive, and antimicrobial: active adhesive dressings (AADs). Created by researchers at the Wyss Institute for Biologically Inspired Engineering at Harvard University, Harvard's John A. Paulson School for Engineering and Applied Sciences (SEAS), and McGill University, AADs can close wounds significantly faster than other methods and prevent bacterial growth without the need for any additional apparatus or stimuli. The research is reported in Science Advances.

Rugged Network File Servers

  • Magazine Article
  • TBMG-35117
Published 2019-09-01 by Tech Briefs Media Group in United States

Ampex Data Systems Hayward, CA 650-367-2011

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Inside VW's expanding SILICON VALLEY LAB

Automotive Engineering: September 2019

Bradley Berman
  • Magazine Article
  • 19AUTP09_04
Published 2019-09-01 by SAE International in United States

The pioneering California innovation hub enters its third decade on a new wave of innovation.

On July 1, Volkswagen renamed its Silicon Valley outpost. The former Electronics Research Lab (ERL) based in Belmont, Calif., is now the Innovation and Engineering Center California (IECC). In its 20-year history, the list of the center's achievements includes winning the 2005 DARPA Grand Challenge, the first use of Google Earth and predictive models in vehicle navigation and approximately 175 patents related mostly to autonomous driving and connected mobility. The engineers and social scientists in Belmont are in the business of cracking tough nuts - but none as hard as the entrenched mindset of auto-industry veterans resistant to change.

Annotation ability available