Browse Topic: Hoods

Items (26)
Find
Electric Vehicle Power Transfer System Using Conductive Automated Connection Devices Vehicle-Mounted Pantograph (Bus-Up)J3105/2_202001 (Current)1/20/2020
This document details one of the connections of the SAE J3105 document. The connections are referenced in the scope of the main document SAE J3105. SAE J3105/2 details the vehicle-mounted pantograph, or the bus-up connection. All the common requirements are defined in the main document; the current document provides the details of the connection. This document covers the connection interface relevant requirements for an electric vehicle power transfer system using a conductive automated charging device based on a conventional rail vehicle pantograph design. To allow interoperability for on-road vehicles (in particular, buses and coaches), one configuration is described in this document. Other configurations may be used for non-standard applications (for example, mining trucks or port vehicles).
Hybrid - EV Committee
Automation of Sorting and Kitting from Cutting Tables2019-01-18999/16/2019
Within the current part production of carbon fiber parts a lot of manual work is included for sorting and kitting of automatic cut plies. This is required due to the high raw material costs and enables a good utilization of the materials. Automation of this non-value adding process will be a big benefit for the part production. The high variety of shapes and the different materials to be processed are complex boundary conditions, which are to be overcome. Broetje is in development of handling systems and automation solutions, which are used for a high variety of materials as well as for a high variety of shapes. These systems are meant to be an add-on for existing cutting tables as well as for fully integrated production systems with downstream automation equipment like draping hoods. Mayor challenges to overcome are safe gripping capabilities, detection of non-cut fibers, high variety of shapes, complex logistic management. These challenges are addressed with Broetje’s ASK solution. This paper will focus on the innovative ASK solution invented by Broetje-Automation.
Berg, Erik
Jeep revives its pickup mojo with 2020 Gladiator19AUTP05_155/1/2019
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
Q&A: Robby Bowles, Professor of Biomedical Engineering, University of Utah, Salt Lake CityTBMG-335821/1/2019
Professor Bowles has developed a method to 3D-print cells to produce human tissue. This replacement tissue can greatly improve the recovery of a person with a badly damaged ligament, tendon, or ruptured disc. Currently, replacement tissue is harvested from another part of the patient's body or sometimes from a cadaver, but it may be of poor quality. This 3D-printing technique can solve those problems.
2019 XC40 showcases Volvo's new CMA platform18AUTP02_142/1/2018
While some larger OEMs have lagged behind the bulging crossover curve, Volvo is launching its third in two years. The 2019 XC40, Volvo's first premium compact CUV and its first global 40-series vehicle, is easily identified as a family member. Volvo calls it a design “cousin” (not a sibling) to its larger XC60 and XC90 stablemates, with its own character. It is also the Swedish maker's first vehicle on the new Compact Modular Architecture (CMA) platform shared with Chinese parent Geely Automobile and the first available through an all-inclusive “Care by Volvo” subscription as an alternative to a traditional sale or lease.
Witzenburg, Gary
Study on Engine Hood with Negative Poisson's Ratio Architected Composites Based on Pedestrian Protection2017-01-03683/28/2017
The conventional hood with single material and stiffener structural form conceals some limitations on pedestrian protection and lightweight, not satisfying the requirements of structural strength, pedestrian protection and lightweight contradictory with each other at the same time. In this paper, a novel type hood is proposed to develop sandwich structure using architected cellular material with negative Poisson's ratio (NPR) configuration based on the decoupling thought of structural strength and energy absorption. Core-layer aluminum alloy material with NPR is used to meet the requirement of impact energy absorption, inner and outer skin using carbon fiber is selected to achieve high structural stiffness needed. This paper starts from the relations between geometric parameters of core-layer architected cellular material and mechanical properties, on this basis, the optimal geometric parameters can be expected using the multiobjective optimization method. Eventually, the optimal novel hood can be obtained using three layer thicknesses as optimization variables, minimum HIC value and minimum mass as objectives. It should be noted that global stiffness of the novel hood is not less than that of conventional hood, and entire thickness of the novel hood is not larger than conventional hood and impact intrusion of novel hood is less than safe distance between hood and engine. Based on limitations above, optimal layer thicknesses of architected cellular structure can be achieved. Then, the novel hood is compared with the conventional hood. The results show that the average HIC value of corresponding collision points in the novel hood decreases by 45%. In addition, bending stiffness of the novel hood achieved increases by 33%, and torsional stiffness increases by 67%. While the weight is reduced, 18.95% exactly. Thus, the novel hood proposed in this paper demonstrates outstanding performance in terms of pedestrian protection, structural stiffness enhancement and weight reduction.
Zhao, Ying, Ma, Fangwu, Yang, Longfan, Wang, Yueqiang, Liang, Hongyu
A Geometrically Exact Isogeometric Blended Shell: Formulation, Benchmarking, and Automotive Application2017-01-13293/28/2017
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 structural solver.
Zou, Zhihui, Willoughby, David, Scott, Michael A., El-Essawi, Mohamed, Baskaran, Raghuraman, Alanoly, James
Development of Virtual Hood Slam Test2016-01-13654/5/2016
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 locations determined through virtual simulation mentioned earlier. Simulation and test results were compared and good correlation of 80% was achieved. This load case is now added to master DVP for deployment to all future projects.
Unadkat, Siddharth Bhupendra, Kangde, Suhas, Burkul, Mahalingesh, Badireddy, Mahesh
Simultaneous Improvement of Vehicle Under-Hood Airflow and Cooling Drag Using 3D CFD Simulation2016-01-02004/5/2016
The radiator is the key component of a vehicle’s cooling system. The cooling effectiveness of a radiator largely depends on the flow of fresh air through it. Thus, at high vehicle speeds, the mass flow rate and flow-distribution or flow-uniformity over the radiator surface are the major operating parameters influencing the performance of a radiator. Additionally, the mass of air coming from the front grille plays an important role on the total drag of the vehicle. This paper presents computational studies aiming at improving simultaneously the efficiency of a radiator and reducing the total drag of the vehicle; this is achieved using passive aerodynamic devices that alter the flow pattern approaching the radiator. The vehicle model considered is a Hyundai Veloster and all analyses were carried out using a commercial CFD code Star-CCM+ version 10.04 by CD-adapco. The baseline model used in this study has a vertical radiator with no air-duct where most of the incoming air from the grille blows over the bottom part of the radiator, which makes the upper part of the radiator ineffective. An air-duct introduced between the front grille and the radiator helps the airflow uniformity over the radiator surface by directing the flow towards the upper part of the radiator. This also resulted in an increased mass flow through the radiator due to faster flow induced by the air-duct. Since only the airflow going through the air-duct is useful for cooling the radiator, one could seal both sides of the front grille to remove excessive airflow going under the hood which reduces the cooling and total drag of the vehicle. Several design iterations involving a variety of air-duct geometries and front grille openings were investigated. The results were compared in terms of airflow uniformity, total mass flow rate through the radiator and total vehicle drag to determine the combination that gives the best performance.
Zhang, Chunhui, Uddin, Mesbah, Song, Xu, Fu, Chen, Foster, Lee
Accident Reconstruction Using Data Retrieval from Crash-Test Video Images2016-01-14644/5/2016
The main source for the estimation of stiffness coefficients to be used in accident reconstruction calculations is a very large database of crash-test related information from NHTSA. However, that database includes only car models sold in the USA. Unfortunately, there is no such information for European-only cars besides the raw video recordings of EuroNCAP crash tests. In the present work a methodology is proposed to estimate the stiffness coefficients of European-only models from video images of EuroNCAP crash tests. However, these images are intricate to assess, because the car front is crushed into a deformable barrier at 40% of the front width and usually the bonnet (hood) hides most of the crash damage. Therefore, the top images could not be used straightforward, so a procedure was envisaged to circumvent this difficulty and still allow to calculate stiffness coefficients for European-only cars. The methodology for stiffness coefficients estimation involves: 1 calculation of an average value for rebound based on NHTSA tests; 2 calculation of the deformation of the deformable barrier as a function of vehicle class; 3 measurement of the maximum deformation, using the superposition of video images of the crash-test; Since the video images are subject to error, such as parallax, a method to reduce these errors was established and used. Then, from the video image it was possible to calculate the permanent deformation by subtracting the rebound (1) and the deformation of the barrier (2) from the maximum deformation (3) that was measured from the image. This methodology allowed to extend the existing database of US cars to European models and to significantly improve the calculation of the dissipated energies associated to the permanent damage caused by accidents.
Martins, Jorge, Ribeiro, Ricardo, Neves, Pedro, Brito, F. P.
Assessment of Microbial Bioburden Within Aerogel MatricesTBMG-238812/1/2016
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.
Acoustic Performance Evaluation of Hood Liner Constructions2015-01-22066/15/2015
In automotive noise control, the hood liner is an important acoustic part for mitigating engine noise. The random incidence absorption coefficient is used to quantify the component level acoustic performance. Generally, air gaps, type of substrate materials, density of the substrate materials and Air Flow Resistivity (AFR) of the cover scrim are the dominant control factors in the sound absorption performance. This paper describes a systematic experimental investigation of how these control factors affect flat sample performance. The first stage of this study is full factorial measurement based on current available solutions from sound absorber suppliers. The acoustic absorption of different hood liner constructions, with variations in materials, density, air gaps, and scrims was measured. Next, hood liners having these different constructions were installed in a vehicle, and sound Power Based Noise Reduction (PBNR) from the engine compartment to the interior was measured to quantify invehicle effects.
Yin, Glenn, Parrett, Alan, Wagh, Nitish, Kinchen, Dennis
Economical Pedestrian Safety Equipment Countermeasures2015-01-14624/14/2015
Each year, more than 270,000 pedestrians lose their lives on the world's roads. Globally, pedestrians constitute 22% of all road traffic fatalities, and in some countries this proportion is as high as two thirds of all road traffic deaths. Millions of pedestrians are non-fatally injured and some of whom are left with permanent disabilities. These incidents cause much suffering and grief as well as economic hardship. To lower the rate of pedestrian injuries and fatalities, the Euro-Ncap committee adopted an overall impact star-grade system in 2009, making the pedestrian protection cut-off score required to obtain the best impact-star grade more stringent until 2016. It is very difficult to surpass the enhanced pedestrian cut-off score using past methods. In this paper, I determine the hood's worst-performing areas in terms of pedestrian protection by analyzing previous pedestrian test results. To improve performance at these areas, I developed a Damping latch & hinge and a 3-corner rearward pop-up system. I then proceeded to optimize the design of the hood inner panel, Long hood + Damping latch & hinge, and 3-corner rearward pop-up systems. Each system was put through a real vehicle pedestrian protection test to verify that it could improve pedestrian protection performance at the designated areas. As a result, we found that a 3-corner rearward pop-up system is the best method for pedestrian protection with consideration for cost, weight, and design.
Yang, Seung Jun
Mass Benchmarking Using Statistical Methods Applied to Automotive Closures2015-01-05744/14/2015
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 then focused on the lightweighting gained by material selection for these mass-efficient designs. This paper focuses on four body closures systems: side door, hood, decklid, and hatchback door. Results include the identification of mass drivers and predictive equations for closure structure mass for both average designs and mass efficient designs; The influence of material selection on mass for both average and mass-efficient designs; and observations on the diminished mass savings achieved at the system level when there is a mass savings due to material substitution at the structure level.
Malen, Donald E., Hughes, Jason
Two-Step Hood Opening System Development for Easier Hood Opening Operation2014-01-03634/1/2014
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
Assessment of Microbial Bioburden Within Aerogel MatricesTBMG-191222/1/2014
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.
Numerical Investigation of Buoyancy-Driven Flow in a Simplified Underhood with Open Enclosure2013-01-08424/8/2013
Numerical results are presented for simulating buoyancy driven flow in a simplified full-scale underhood with open enclosure in automobile. The flow condition is set up in such a way that it mimics the underhood soak condition, when the vehicle is parked in a windbreak with power shut-down after enduring high thermal loads due to performing a sequence of operating conditions, such as highway driving and trailer-grade loads in a hot ambient environment. The experimental underhood geometry, although simplified, consists of the essential components in a typical automobile underhood undergoing the buoyancy-driven flow condition. It includes an open enclosure which has openings to the surrounding environment from the ground and through the top hood gap, an engine block and two exhaust cylinders mounted along the sides of the engine block. The calculated temperature and velocity were compared with the measured data at different locations near and away from the hot exhaust plumes. The numerical predictions reveal a complex flow structure under the buoyancy condition, and the results show very favorable comparisons with the experimental velocity and temperature measurements.
Chen, Kuo-Huey, Johnson, James, Merati, Parviz, Davis, Charles
Analysis of Damage Caused to Vehicle Body Panels by Impacting Hail and Various Tools and Objects2013-01-14384/8/2013
On the 25th December 2011 there was a hail storm in the state of Victoria, Australia, which caused approximately AU$712 million worth of damage. Some of this damage was caused to passenger vehicles. The authors conducted a number of inspections of hail-damaged vehicles as a result of insurance claims being disputed or rejected on the basis that some, or all, of the alleged hail damage was not created by hail but instead created intentionally by the vehicles' owners with the use of different tools and/or objects. As a result of the inspections and investigations of potentially fraudulent claims, the authors conducted a total of 119 tests designed to replicate damage caused to vehicle body panels by impacting hail and to recreate claimed hail damage by using tools and other objects. To do so, the authors created two sizes of hail: Ø20 mm and Ø40 mm hail. A total of 15 impact tests were conducted with Ø20 mm hail. The impact speed for the Ø20 mm hail varied between 75 km/h and 144 km/h, with the average being 113 km/h. A total of 50 impact tests were conducted with Ø40 mm hail. The impact speed for the Ø40 mm hail varied between 66 km/h and 133 km/h, with the average being 101 km/h. The testing impact speeds were generally higher than the terminal velocities of the corresponding hail, so the damage observed is expected to be an over estimation of the actual damage caused by hail. The hail was projected at the test vehicle using a purpose-built projectile launching device that used a sling-like mechanism to project hail in a horizontal direction at a test vehicle. The test vehicle was a white-colored 2001 model Holden Commodore with non-metallic paint. The body panels tested were: bonnet, roof, boot, all four doors, the vehicle pillars and cant rail. High speed cameras were used to determine the impact speed of the hail. Damage was photographed and recorded. In addition to impacting the vehicle with hail, a number of different tools and objects were used to recreate man-made damage. Tools and objects used were: claw hammer (conventional), welding hammer, ball-peen hammer, mason hammer, lead ball sink in a sock, golf ball in a sock, ratchet, breaker bar, crowbar and center punch. The conducted tests revealed the following findings: 1. hail impacting the vehicle body panels will not scratch or mark the paint but the paint may chip if hail impacts the vehicle near a fold or edge of a panel; 2. dents caused by hail will cause the light to move smoothly and continuously across the dent and the light will not "break" or crease; 3. where dents were caused by tools and objects the light will crease into multiple (two or more) distinct areas as it passes over the dent; 4. scratches and/or markings in the paint were identified on dents caused by tools and objects; 5. folds and curves on the panels did not affect the size of the dent caused to the panel; using the same tool and force to impact two different body panels (A-pillar and roof) resulted in dents that were very similar in physical appearance; 6. for the same impact speed the larger Ø40 mm hail caused more damage than the Ø20 mm hail; and 7. for the same size hail the higher impact speed hail caused more damage.
Josevski, Nikola, Sandvik, Andreas, Jones, Chris, Pok, Tandy, Orton, Tia, Richardson, Shane
Experimental and Numerical Investigation of the Under Hood Flow with Heat Transfer for a Scaled Tractor-Trailer2012-01-01074/16/2012
Aerodynamic design and thermal management are some of the most important tasks when developing new concepts for the flow around tractor-trailers. Today, both experimental and numerical studies are an integral part of the aerodynamic and thermal design processes. A variety of studies have been conducted how the aerodynamic design reduces the drag coefficient for fuel efficiency as well as for the construction of radiators to provide cooling on tractor-trailers. However, only a few studies cover the combined effect of the aerodynamic and thermal design on the air temperature of the under hood flow [8, 13, 16, 17, 20]. The objective of this study is to analyze the heat transfer through forced convection for a scaled Cab-over-Engine (CoE) tractor-trailer model with under hood flow. Different design concepts are compared to provide low under hood air temperature and efficient cooling of the sub components. The measured data have been used to validate the computational simulations performed with STAR-CCM+. At first, the experimental and numerical investigation of a transitionally rough surface on a flat plate with zero pressure gradient at high Reynolds number is presented to understand more about the boundary layer profile and skin friction coefficient. Furthermore, a generic study examines the temperature field of the near-wake flow for a heated surface-mounted block. In the main experimental and numerical part of the work, some first results of the heat transfer for the scaled tractor-trailer model with under hood flow are given. In the experiments, hot air has been generated by flowing through a heated scaled radiator to investigate the effect of the under hood mass flow by covering the inlet. For the standard configuration the measured air temperature distribution after the heat exchanger and under hood side wall inside the engine compartment as well as the drag coefficient has been compared to the numerical results.
Heinzelmann, Beat, Indinger, Thomas, Adams, Nikolaus, Blanke, Reinhard
Influencing Factors of Contact Force Distribution in Pedestrian Upper Legform Impact with Vehicle Front-End2012-01-02724/16/2012
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 zone. The calculation method is verified using a simplified model of vehicle front-end structure developed in a previous study. Then a parametric study is conducted using the simplified vehicle front-end model to study influence of key design variables. The results of the parametric study, to some extent, have revealed relationship among vehicle front-end design parameters such as styling, geometry and stiffness, contact characteristics such as the maximum stress on outer foam, and the injury parameters (mainly the impact force).
Nie, Bingbing, Huang, Jun, Xia, Yong, Zhou, Qing
Aerodynamic Investigation of Vehicle Cooling-Drag2012-01-01704/16/2012
The interaction between cooling-air and external aerodynamics is known as interference. In a conventional car this interference under the hood results in additional drag. It is estimated that about 10% of the overall aerodynamic drag originates from the cooling air [1] depending on the car shape and cooling configuration. Obviously, cooling drag should be minimized for vehicles with low-drag aerodynamics. In this study cooling-air interference-effects are investigated through experimental, numerical and analytical methods with a focus on the surface pressure of the vehicle. The surface pressure of vehicles with and without interference effects is compared. Observations show that when the cooling-air inlet is opened a pressure rise occurs around the inlet, while a pressure drop appears around the outlet. This phenomenon was investigated for several vehicle shapes including a simplified bluff-body (SAE-Body) and a close-to-real quarter-scale model (aeromodel). Using this knowledge, a cooling duct with low cooling drag was investigated. It will be shown that the cooling drag decreases when the air is redirected appropriately, yet the pressure increase at the front of the vehicles cannot be avoided.
Baeder, Dirk, Indinger, Thomas, Adams, Nikolaus, Unterlechner, Peter
A Springback Compensation Study on Chrysler 300C Stamping Panels Using LS-DYNA®2008-01-14434/14/2008
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 Process2000-01-267810/3/2000
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 car2000-05-01106/12/2000
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 Transducers7412272/1/1974
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 HandleAS4556-2 (Current)4/28/1953
No scope available.
Engine and Airframe Technical Standards Committee (TSC)
Items per page:
1 – 26 of 26