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2017-05-15 ...
  • May 15-16, 2017 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
Today's necessity for quickly delivering products to market limits product development time and leaves less room for error and 're-dos.' With so many plastic materials available, it is crucial that those involved in product design understand resin properties and how they affect part design and manufacturability. To help you make the best plastic choices the first time, this seminar provides an overview of polymer chemistry, explains the methods for testing properties of plastics and presents a method of systematic selection that will optimize your plastics material selection process.
2017-04-11
Journal Article
2017-01-9451
Marouen Hamdi, Drew Manica, Hung-Jue Sue
Abstract Brightness, transparency, and color impact critically the aesthetics of polymeric surfaces. They can significantly change the perception of common damages such as scratch and mar. Particularly, subtle mar damage is more dependent on surface perceptual properties. In this study, we investigate the impact of these attributes on scratch and mar visibility resistance of commercialized polymeric model systems frequently used in automotive industry. Twenty subjects were involved in a psychophysical test based on pairwise comparison, and results were treated using multidimensional scaling (MDS) analysis. A tied ordinal weighted Euclidian MDS model was used to visualize the relational structures of mar perception space. Results show that scratch visibility resistance tends to decrease with dark, more transparent, and green surfaces. Mar perception was reasonably conceptualized by a two-dimensional MDS space.
2017-04-06
Event
Presentations of this session will address application and research on coatings for exterior body and plastics (including polycarbonate) as well as vehicle interiors and underbody/underhood. Focus will be on the 3-10 year timeframe.
2017-04-06
Event
Presentations of this session will address application and research on coatings for exterior body and plastics (including polycarbonate) as well as vehicle interiors and underbody/underhood. Focus will be on the 3-10 year timeframe.
2017-04-06
Event
Presentations in this session include welding (i.e., friction stir, ultrasonic, resistance, arc, laser, etc.) and joining (i.e., brazing, soldering, riveting, bolting, and adhesives) of similar or dissimilar materials (i.e., plastics, composites, aluminum, magnesium, titanium, and conventional and advanced high strength steels). Strength, fracture, and fatigue implications of these methodologies will be discussed.
2017-04-06
Event
Presentations in this session include welding (i.e., friction stir, ultrasonic, resistance, arc, laser, etc.) and joining (i.e., brazing, soldering, riveting, bolting, and adhesives) of similar or dissimilar materials (i.e., plastics, composites, aluminum, magnesium, titanium, and conventional and advanced high strength steels). Strength, fracture, and fatigue implications of these methodologies will be discussed.
2017-04-05
Event
Presentations in this session include welding (i.e., friction stir, ultrasonic, resistance, arc, laser, etc.) and joining (i.e., brazing, soldering, riveting, bolting, and adhesives) of similar or dissimilar materials (i.e., plastics, composites, aluminum, magnesium, titanium, and conventional and advanced high strength steels). Strength, fracture, and fatigue implications of these methodologies will be discussed.
2017-04-04
Event
Presentations of this session will address the development of Polymeric Multi Material & Composite materials for automotive interiors and exteriors, powertrain components, as well as structural and non-structural applications. Focus is on design, processes, bonding and manufacturing technologies, as well as lightweighting strategies.
2017-04-04
Event
Presentations of this session will address the development of Polymeric Multi Material & Composite materials for automotive interiors and exteriors, powertrain components, as well as structural and non-structural applications. Focus is on design, processes, bonding and manufacturing technologies, as well as lightweighting strategies.
2017-03-28
Technical Paper
2017-01-0487
Daisuke Hyodo, Kiyohiro Suzuki, Toshiyuki Tsutsumi, Kuriyama Hideki
Rubber gaskets, for example O-rings, and rubber valves achieve their sealing performances when compressed rubber material fills in the gap between the gasket and the counter surface and a continuous contact is formed between them. Leaking is likely to occur at low temperature since it is difficult for the rubber gasket to deform along the roughness of counter surface because of decreasing in rubber elasticity. However, sticking to the counter surface prevents the gasket from ease removing from it due to sealing pressure and sealing fluid from leaking through the gap. It is considered that sticking affects sealing property of rubber gaskets at low temperature. Therefore we studied effects of rubber material, roughness of counter surface and temperature sequence on sealing property by measuring sticking force and observing contact area. The sealing property depended on sticking force at low temperature and enhancement of sticking force enabled to seal at higher pressure.
2017-03-28
Technical Paper
2017-01-0363
Karthik Ramaswamy, Vinay L. Virupaksha, Jeanne Polan, Biswajit Tripathy
EPP foams are most commonly used in automotive applications for pedestrian protection and to meet low speed bumper regulatory requirements. In today’s automotive world the design of vehicles are predominantly driven by CAE. This makes it necessary to have validated material model for EPP foams in order to simulate and predict performance under various loading conditions. Since most of the automotive OEMs depend on local material suppliers for their global vehicle applications it is necessary to understand the variation in mechanical properties of the EPP foams and their effect on performance predictions. In this paper, EPP foams from three suppliers across global regions are characterized to study the inter-supplier variation in mechanical properties. In order to understand the effect of inter-supplier variation on vehicle performance, LSDYNA rate dependent material model is developed and validated for low speed and pedestrian protection load cases.
2017-03-28
Technical Paper
2017-01-0125
Marco Pizzi, Mauro Zorzetto, Alberto Barbano, Piercarlo Merlano, Luca Vercellotti
The reduction of emissions in gasoline and diesel engines is driving the introduction of systems implementing additives in liquid form: in particular water for injection systems in gasoline engines and urea solutions (AD-blue) in SCR systems in diesel engines. Unfortunately water and AD-Blue can freeze in the car operative temperature range. In both cases the tanks must be equipped with heaters to guarantee a sufficient amount of additives in liquid form. Currently used technologies are ceramic PTC elements and distributed metal resistors. Ceramic PTC based heaters concentrate all the power in small volumes. They need thermally conductive elements distributing the power over a wide area. The assembly is complex and the cost of the metal parts and related packaging technologies used to insulate the heater from the environment (water or urea) is typically high. Metal resistors are cheaper but must be controlled in current.
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
2017-01-0284
Sajjad Raeisi
Additive manufacturing has been a promising technique for producing sophisticated porous structures. The pore's architecture and infill density percentage can be easily controlled through additive manufacturing methods. This paper reports on development of polymer extruded cross sections ad lightweight materials manufactured using additivemanufacturing technology. In this study, three types of crosssections with same 2D porosity are generated by way of particular techniques. a) The regular cross section of hexagonal honeycomb, b) The heterogeneous pore distribution of closed cell aluminum foam cross section obtained from image processing and c) linearly patterned topology optimized 2D unit cell undercompressive loading condition. All the cross sections have the same cavity to matter ratio on their 2D configuration. The samples are extruded to produce 3D CAD model of honeycomb shape porous structure.
2017-03-28
Technical Paper
2017-01-1190
Patrick Maguire, Hyung Baek, Stephen Liptak, Olivia Lomax, Rodolfo Palma, Yi Zhang
As electrified powertrains proliferate through original equipment manufacturer vehicle offerings, the focus on system cost and weight reduction intensifies. This paper describes the development and evaluation of a high voltage (HV) battery system enclosure molded from high density polyethylene (HDPE) to deliver substantial cost and weight opportunities. While previous battery enclosure alternatives to steel and aluminum have focused on thermoset composites and glass filled polypropylene, this solution leverages HDPE design techniques established for fuel tanks and applies them to a HV battery, with some notable differences such as employing two injection molded halves which are joined via infrared welding. The result is a tough, energy absorbing structure, capable of hermetic sealing, which simplifies manufacturing by eliminating nearly all fasteners.
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