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Viewing 1 to 14 of 14
2014-04-01
Technical Paper
2014-01-1040
Gihwan Kim, Chi-Hoon Choi, You Sung Moon, Yong Sun (Steven) Jin
Abstract The main contribution of this paper is to employ a sound and vibration theory in order to develop a light and cost effective plastic intercooler pipe. The intercooler pipe was composed of two rubber hoses and one aluminum pipe mounted between an ACV (Air Control Valve) and an intercooler outlet. The engineering design concept is to incorporate low-vibration type bellows and an impedance-mismatched center pipe, which replaces the rubber hoses and aluminum pipe respectively. The bellows were designed to adapt powertrain movement for high vibration transmission loss to the intercooler outlet. Also, the impedance-mismatched center pipe was implemented to increase reflected wave by using relatively higher modulus than bellows part and applying a SeCo (Sequential Coextrusion) processing method.
1999-03-01
Technical Paper
1999-01-0023
J. Michael James, John J. Vincent
The electrocoat operating windows of five automotive sheet steel products (uncoated cold rolled, electrogalvanized, hot dip galvanized, electrogalvanneal, and hot dip galvanneal) were compared. The effect of variations in base steel chemistry and galvanneal coating structure on the operating window were also evaluated. While all variations exhibited an acceptable electrocoat operating window, there was a measurable difference between the five sheet steel products. There was no effect of the galvanneal coating structure or base steel chemistry on the operating window.
2001-10-16
Technical Paper
2001-01-3062
Dinesh Seksaria, Sherri McCleary, Kenneth Nelson
Light-duty pickup trucks have been and are an important growing segment of the US automotive market. Like all other vehicles on the road, they must also do their part to conserve fuel and weight reduction is a vital tool for achieving this goal. Tailgates currently installed on pickup trucks typically weigh over 30 lbs. and weight loss in these panels is very desirable. Recent demographic shifts in truck users has also lead to more interest in light-weighting of components like the tailgate for ergonomic reasons. Manufacturers have reached the limit for light-weighting tailgates using current materials and manufacturing processes. This new concept changes the paradigm. It uses a hybrid system of aluminum and plastic composite materials along with new manufacturing and assembly processes to achieve a significant weight reduction without compromising performance or other desired attributes. This paper describes the design and demonstrates its viability via analysis and test results.
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.
2012-12-19
Article
Daimler's decision to halt use of the new refrigerant on safety concerns leads to a product defense by joint-venture suppliers Honeywell and DuPont, citing SAE studies and their own tests. Although GM is the only U.S. maker with R-1234yf cars, Ford also backs the refrigerant's use.
2012-08-20
Article
DuPont Performance Polymersdeveloped Vamac Ultra HT to extend heat resistance and the dynamic performance of the standard Vamac portfolio to a temperature range of 170-180°C (338-356°F), suitable for demanding applications such as turbo hoses and air ducts.
2008-10-24
Article
Claims of "firsts" come thick and fast in the auto industry, and now there is a new one for series production cars: a weight-saving oil-pan module made from a thermoplastic polymer—"for the first time in automotive history," according to DuPont. Mercedes-Benz is fitting the polymer oil pan to its new 2.2-L diesel engine.
2008-03-31
Article
The planet wheels in Voith Turbo’s new DIWA.5 automatic gearboxes rotate against DuPont Vespel thrust washers separating them from the planet-wheel carrier. Developed for public transit buses by Voith Turbo, of Heidenheim, Germany, the thrust washers made of DuPont Vespel SP21 polyimide provide a low-abrasion function while working in an environment with high relative rotating speeds of more than 20,000 rpm between the components.
2008-07-08
Article
Nissan Motor Manufacturing in Europe is replacing some metal underhood components with high-performance polymers. It is using DuPont’s Minlon and Zytel products for the rocker cover and front cover of its 2.5-L turbodiesel engine.
2011-06-11
Article
Vespel SCP-5009 polyimide shapes from DuPont assist customers requiring extended part life in sealing and bearing applications, especially in nonlubricated, high-friction environments.
2010-01-21
Article
Following a path well-worn by their counterparts in aerospace and automotive design, off-highway engineers seem to be readying themselves to replace metal with thermoplastics. A primary reason is to reduce weight, and a key secondary reason is for controlling noise and vibration.
2010-06-29
Article
DuPont Vespel SP thrust washers are suitable for continuous temperatures of up to 290°C (554°F) and short-term peaks up to 480°C (896°F).
2009-09-04
Article
DuPont has expanded its Vespel line with SP-2515 polyimide parts, which can improve dimensional control and reduce component weight in fluid- and motion-control systems.
2014-04-01
Technical Paper
2014-01-0961
Alan R. Wedgewood, Patrick Granowicz, Zhenyu Zhang
Abstract Materials used in automotive components play a key role in providing crash safety to passengers and pedestrians. DuPont's lightweight hybrid material technology, which combines injection molded fiber reinforced plastics with drape molded woven composite materials, provides safety engineers with stiff energy absorbing alternatives. In an effort to validate the hybrid material's crash performance while avoiding expensive crash testing, numerical tools and methodologies are applied in evaluation of a hybrid composite test beam. Multi-scale material models capturing nonlinear strain-rate dependency, anisotropic characteristics, and failure criteria are calibrated on a fiber reinforced plastic and a woven fabric. The fiber orientation and warp/weft angles were extracted from injection and drape molding simulation.
Viewing 1 to 14 of 14