Browse Topic: Hoods

Items (18)

CAE driven light weighting of automotive hood using multiple loadcase optimization

2022-01-095503/29/2022

In the automotive industry the requirement for low emissions has led to the demand for lightweight vehicle structures. Light weighting can be achieved through different iterative approaches but is usually time consuming. Current paper highlights deployment of the multi-objective optimization approach for light weighting. This work involves developing a process for multi-objective optimization (MOO) for vehicle durability system, in this case Hood. The main goal is to minimize the weight of a Hood assembly by meeting strength and stiffness targets. The design variable considered in the study is thickness of the panels. Design constraints were set for Stress and Stiffness based on DVP requirement. Optimization workflow is setup in modeFRONTIER with design objective as minimizing weight of hood. Using the Design of Experiments (DOE) data response surfaces are generated using different algorithms for prediction of the structural performance parameters such as displacement, modal frequency

Kangde, Suhas

SAE TOMORROW TODAY: Lifting the Hood on the Engineering of Ford Motor Company's Mustang Mach-E

1312705/21/2021

Introduced 57 years after the launch of its iconic namesake, the Mustang Mach-E reinvented the game and has been named the 2021 North American Utility Vehicle of the Year. On this episode, Ron Heiser, Mustang Mach-E Chief Engineer with the Ford Motor Company, joins us to talk about the vehicle's origins, engineering, reductive design, as well as the pending release of the Ford Mustang E-GT.

Hineman, Marcie

SAE TOMORROW TODAY: Building Next-Gen Electric Vehicles From the Ground Up with Lucid Motors

1287611/25/2020

Small but mighty. That's the future of electric vehicles. As Lucid Motors prepares to launch its first vehicle, Lucid Air, next spring, the company will also be proving that passengers don't have to sacrifice luxury, power and space for efficiency and innovation. We spoke with Eric Bach, Vice President of Hardware Engineering at Lucid Motors, to get a look "under the hood" and understand the technology that's transforming how we think about electric vehicles. Discover how Lucid Motors' competitive nature launched the company into the racing scene, how miniaturization plays a key role in Lucid Air's innovation and how customers can harness the vehicle's electric technology to power life beyond the car itself.

Hineman, Marcie

Jeep revives its pickup mojo with 2020 Gladiator

19AUTP05_1505/01/2019

Get ready for the fractionalization of the U.S.'s raucous pickup-truck market. Launching what's surely one of the year's most-anticipated and potentially significant new models, Jeep engineers and planners insist they went out of their way to ensure the 2020 Gladiator was developed as a genuine pickup and not “a Wrangler with a bed.” But everyone knows Jeep would've been crazy to stray too far from the radiant demand for the new JL-generation Wrangler, so excuse us if the Gladiator does, well, at least look like just that: a 4-door Wrangler Unlimited-with a bed.

Visnic, Bill

A Geometrically Exact Isogeometric Blended Shell: Formulation, Benchmarking, and Automotive Application

2017-01-132903/28/2017

We present a geometrically exact isogeometric blended shell formulation. In other words, all geometric quantities appearing in the blended theory are evaluated exactly and no approximations are employed. The blended approach allows higher-order shell theories, like Kirchhoff-Love, to be combined with Reissner-Mindlin shell formulations, which have rotational degrees of freedom. In this way, rotations can be employed only where needed to simplify shell modeling such as at kinks and intersections. Away from these regions shear locking free formulations can be employed to improve robustness, accuracy, and efficiency. We compare our approach to standard shell elements commonly used in industry on several benchmarks to explore the behavior of the element. We then model an inner car hood to demonstrate our ability to handle complex CAD geometry in a simple manner without geometry cleanup and mesh generation steps. This shell element forms the basis of the newly developed Isogeometrx

El-Essawi, Mohamed, Baskaran, Raghuraman, Alanoly, James, Zou, Zhihui, Willoughby, David, Scott, Michael A.

Development of Virtual Hood Slam Test

2016-01-136504/05/2016

The overall automotive industry is moving toward first time right test which in turn needs first time right analysis. This is due to the enormous pressure of cost, mass, time to market and availability of prototype vehicles for testing. Use of finite element methods enables to upfront predict the system behavior in operating conditions and evaluation of structural strength. In vehicle product development process, hood slam durability evaluation is one of the important tests for body closure structure. Current work showcases an effort made for developing virtual hood slam test. The virtual model consists of BIW, hood, hinge joint, interface like CRFM (cooling-radiator-fan module) and latch mechanism with spring preload. Analysis performed with LSDyna solver. An impact loading is applied by converting potential energy to kinetic energy, mimicking the hood dropping from a specified height on the hood latch. In the physical test, strain gauge measurements were carried out at high-stress

Unadkat, Siddharth Bhupendra, Kangde, Suhas, Burkul, Mahalingesh, Badireddy, Mahesh

Assessment of Microbial Bioburden Within Aerogel Matrices

TBMG-2388102/01/2016

A makeshift apparatus has been designed composed of a sealed, hydrophobic 2-propanol/SiO2 aerogel component to filter outside air particles. Following verification and assessment, the apparatus was crafted with a Buchner funnel. Aerogel matrices were tightly fitted into filter housings and secured in side-arm flasks, which were then equipped to a vacuum pump to pull air through the aerogel matrices. Aerogels, both with and without fiberglass reinforcement, were used to collect airborne particulates for one- and three-hour increments. An untreated negative control aerogel, employing air collection from a laminar hood, and a positive aerogel matrix were seeded with endospores that verified the extraction from the matrices.

Mass Benchmarking Using Statistical Methods Applied to Automotive Closures

2015-01-057404/14/2015

Understanding the lightweighting potential of materials is important in making strategic decisions for material selection for a new vehicle program. Frequently benchmarking is done to support these decisions by selecting a reference vehicle which is believed to be mass efficient, then using the teardown mass data to set targets for the vehicle under design. In this work, rather then considering a single benchmark vehicle or a small set of vehicles, we looked at a large sample of vehicles over a range of sizes and segments (approximately 200 vehicles). Statistical methods were used to identify mass drivers for each subsystem. Mass drivers are the attributes of the vehicle and subsystem which determine subsystem mass. Understanding mass-drivers allows comparisons across vehicle size, segments, and materials. Next, we identified those vehicles which had subsystems which were much lighter than the average after adjusting for mass drivers. This set was defined as mass-efficient designs. We

Malen, Donald E., Hughes, Jason

SAE Eye on Engineering: New EcoBoost Mustang

1188010/06/2014

Last week, Automotive Engineering Senior Editor Lindsay Brooke drove the sixth-generation Ford Mustang in a day-long test on California mountain roads. Surprisingly, his favorite model packs a 2.3-L four-cylinder turbo under the hood.

Two-Step Hood Opening System Development for Easier Hood Opening Operation

2014-01-036304/01/2014

Recently, the demand for improving the merchantability of hood open system has been increasing. A novel concept hood open system was proposed by Hyundai Motor Company (HMC) in 2012, which was based on a two-step open latch mechanism. The new hood opening mechanism satisfies Safety laws and improves merchantability.

Kim, Sangil, Seo, Seungwoo, Jung, ChungHwa, Baek, SeungHyun, Ha, ChangGi, Ahn, KiRyun, Tak, MunBae

Momentum: April 2014

14MOMP0404/01/2014

Methodology developed for safer hood design The methodology enables material selection and design optimization of energy absorbers for pedestrian protection based on a simple laboratory test and FE model, eliminating the need for extensive vehicle testing. Developing a winning formula It's been 20 years since the University of Michigan won a Formula SAE championship. Sick of getting smoked in recent years by top teams from Germany and the U.S., MRacing is going "big aero" for a better crack at the 2014 crown.

Assessment of Microbial Bioburden Within Aerogel Matrices

TBMG-19122

02/01/2014

Influencing Factors of Contact Force Distribution in Pedestrian Upper Legform Impact with Vehicle Front-End

2012-01-027204/16/2012

Pedestrian upper leg impact protection is a challenging requirement in the Euro NCAP assessment. In upper legform to bonnet leading edge tests, the legform impact force, the legform intrusion and the injury parameters (impact force and bending moment measured on the upper legform) are highly related to design of vehicle front-end styling and structure, as well as clearance underneath bonnet leading edge. In the course of impact, the contact area variation has significant influence on the stress distribution and consequently the force and the bending moment on the upper legform. Using finite element simulations of upper legform impact with a typical sedan, the deformation of the legform and the vehicle structure, and the variation of the contact force distribution are characterized and analyzed. Based on the study, a method for calculating the contact force is put forward by assuming a shape of the contact zone on the upper legform and a stress distribution function within the contact

Nie, Bingbing, Huang, Jun, Xia, Yong, Zhou, Qing

A Springback Compensation Study on Chrysler 300C Stamping Panels Using LS-DYNA®

2008-01-144304/14/2008

Springback compensation studies on a few selected auto panels from the hot selling Chrysler 300C are presented with details. LS-DYNA® is used to predict the springback behavior and to perform the iterative compensation optimization. Details of simulation parameters using LS-DYNA® to improve the prediction accuracy are discussed. An iterative compensation algorithm is also discussed with details. Four compensation examples with simulation predictions and actual panel measurement results are included to demonstrate the effectiveness of LS-DYNA® predictions. An aluminum hood inner and a high strength steel roof bow are compensated, constructed and machined based on simulation predictions. The measurements on actual tryout panels are then compared with simulation predictions and good correlations were achieved. Iterative compensation studies are also done on the aluminum hood inner and the aluminum deck lid inner to demonstrate the effectiveness of LS-DYNA® compensation algorithm.

Hu, Yang, Nagarajarao, Manjunath S., Zhu, Xinhai

Single-Sided Projection Welding of Aluminum Automotive Sheet Using the HY-PAK® Welding Process

2000-01-267810/03/2000

Several significant process and product developments have enabled single-sided projection welding of 6XXX-T4 automotive aluminum sheet (patent pending). Hem welding was performed on geometries typically encountered on door and hood applications using an enhanced version of the HY-PAK® technology. This process is unique because both electrodes approach from the same side of the component, enabling no visible weld mark on the opposing surface. An experimental design was developed to understand the influence of the major process variables (weld current, weld force, projection height) on the tensile shear and button peel performance. The DOE was performed on single-sided projection welds consisting of 0.8mm 6111-T4 aluminum sheet. The results indicate a range of acceptable process parameters that produced tensile shear strengths on the order of the Aluminum Association's T-10 recommended values for resistance welds of that gauge.

Spinella, Donald J., Van Otteren, Robert, Borsenik, Barry, Patrick, Edward P.

Low-pressure molding compound hood panel for a passenger car

2000-05-011006/12/2000

Low-pressure molding compound (LPMC) is a new kind of composite material which can be used for automotive body panels. LPMC has similar mechanical properties compared to conventional sheet molding compound (SMC) but excellent moldability due to the different thickening system. In this paper, we prepared LPMC hood prototype for a passenger car using a low-cost tooling. Inner panel and outer panel were made of general-density- and low-density-grade LPMC, respectively, in order to maximize weight reduction maintaining surface quality. Physical properties containing tensile strength, flexural modulus, notched Izod impact strength of those samples were investigated. In addition, CAE simulation was also done for strength analysis of the hood assembly.

Choi, Chi-Hoon, Park, Sang-Sun, Ahn, Kye-Won, Rhee, Jeong-Eek

The State of the Art of Transducers

74122702/01/1974

The historical and current state of the art on transducers have been very well covered in papers presented to SAE, in particular in a paper by Mr. R.B. Hood at the conference in February this year (740015). The opportunity is now taken to forecast the direction of further development and future usefulness of various types of transducers as seen through European eyes.

McEwen, E.

AS4556 Hood Jettison Release Handle

AS4556-2 (Current)04/28/1953

No scope available.

Engine and Airframe Technical Standards Committee (TSC)

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