Terms:
SAE International Journal of Materials and Manufacturing
AND
7
AND
3
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Events

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

RETRACTED: Reengineering the Layout: A CMS Methodological Approach

SAE International Journal of Materials and Manufacturing

Laxminarayan Institute of Technology-Jayant Hemachandra Bhangale, Ashish Manohar Mahalle
  • Journal Article
  • 2014-01-9100
Published 2014-06-06 by SAE International in United States
Presently, most of the companies have combination of process and product layout. Cellular manufacturing is a place where company has established one or more manufacturing cells. Due to competition, Automobile industries are changing existing plant layout to “Cellular Layout” in which manufacturing process is carried out by proper arrangement of machines. This research paper aims at the optimization of cellular manufacturing layout using: cell formation stage, cell layout stage. In the first stage, a heuristic based upon the material flow is developed, which allows the machines to be clustered more naturally. In the second stage, a genetic algorithm is used to optimize the machine layout within each cell, in which a previously defined material handling system is provided. This representation allows the design of the layout and aisle-structure simultaneously, and can be converted into a string representation adaptable by a genetic algorithm for optimization. The number of aisles in the optimized aisle-structure is also minimized. A computational experiment was carried out based upon solving three problems from the literature. The results showed that cell configuration…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Impacts of Non-Traditional Uses of Polyurethane Foam in Automotive Applications at End of Life

SAE International Journal of Materials and Manufacturing

Univ of Windsor-Susan Sawyer-Beaulieu, Edwin Tam
Univ. of Windsor-Lindsay J. Miller
  • Journal Article
  • 2014-01-9099
Published 2014-05-05 by SAE International in United States
Polyurethane (PU) foam is used for many automotive applications with the benefits of being lightweight, durable, and resistant to heat and noise. Applications of PU foams are increasing to include non-traditional purposes targeting consumer comfort. An example of this is the use of PU foam between the engine and engine cover of a vehicle for the purpose of noise abatement. This addition will provide a quieter ride for the consumer, however will have associated environmental impacts. The additional weight will cause an increase in fuel consumption and related emissions. More significant impacts may be realized at the end-of-life stage. Recycling PU foams presents several challenges; a lack of market for the recyclate, contamination of the foams, and lack of accessibility for removal of the material. PU foam pieces are likely to end up being landfilled after the vehicle is shredded, negating the benefit of choosing this material for its recyclability over another non-recyclable material. PU foams have been credited with contributing to the light weighting of vehicles, however it is important to distinguish between cases…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Life Cycle Energy and Environmental Assessment of Aluminum-Intensive Vehicle Design

SAE International Journal of Materials and Manufacturing

Oak Ridge National Laboratory-Sujit Das
  • Journal Article
  • 2014-01-1004
Published 2014-04-01 by SAE International in United States
Advanced lightweight materials are increasingly being incorporated into new vehicle designs by automakers to enhance performance and assist in complying with increasing requirements of corporate average fuel economy standards. To assess the primary energy and carbon dioxide equivalent (CO2e) implications of vehicle designs utilizing these materials, this study examines the potential life cycle impacts of two lightweight material alternative vehicle designs, i.e., steel and aluminum of a typical passenger vehicle operated today in North America.LCA for three common alternative lightweight vehicle designs are evaluated: current production (“Baseline”), an advanced high strength steel and aluminum design (“LWSV”), and an aluminum-intensive design (AIV). This study focuses on body-in-white and closures since these are the largest automotive systems by weight accounting for approximately 40% of total curb weight of a typical passenger vehicle. Secondary mass savings resulting from body lightweighting are considered for the vehicles' engine, driveline and suspension.A “cradle-to-cradle” life cycle assessment (LCA) was conducted for these three vehicle material alternatives. LCA methodology for this study included material production, mill semi-fabrication, vehicle use phase operation, and end-of-life…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Failure Mode and Fatigue Behavior of Dissimilar Laser Welds in Lap-Shear Specimens of Aluminum and Copper Sheets

SAE International Journal of Materials and Manufacturing

Ford Motor Co.-Yunan Guo, Xuming Su
Univ. of Michigan-Wei-Jen Lai, Shin-Jang Sung, Jwo Pan
  • Journal Article
  • 2014-01-1986
Published 2014-04-01 by SAE International in United States
Failure mode and fatigue behavior of dissimilar laser welds in lap-shear specimens of aluminum and copper sheets are investigated. Quasi-static tests and fatigue tests of laser-welded lap-shear specimens under different load ranges with the load ratio of 0.1 were conducted. Optical micrographs of the welds after the tests were examined to understand the failure modes of the specimens. For the specimens tested under quasi-static loading conditions, the micrograph indicates that the specimen failed through the fusion zone of the aluminum sheet. For the specimens tested under cyclic loading conditions, two types of failure modes were observed under different load ranges. One failure mode has a kinked crack initiating from the interfacial surface between the aluminum and copper sheets and growing into the aluminum fusion zone at an angle close to 90°. The other failure mode has an interfacial crack initiating at the interfacial surface between the aluminum and copper sheets and growing along the interfacial surface between the fusion zone and the copper base metal at an angle close to 90°. In general, the fatigue…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

A New Metamodeling Approach for Time-Dependent Reliability of Dynamic Systems with Random Parameters Excited by Input Random Processes

SAE International Journal of Materials and Manufacturing

Oakland Univ.-Dorin Drignei, Zissimos Mourelatos, Monica Majcher
US Army TARDEC-Igor Baseski
  • Journal Article
  • 2014-01-0717
Published 2014-04-01 by SAE International in United States
We propose a new metamodeling method to characterize the output (response) random process of a dynamic system with random parameters, excited by input random processes. The metamodel can be then used to efficiently estimate the time-dependent reliability of a dynamic system using analytical or simulation-based methods. The metamodel is constructed by decomposing the input random processes using principal components or wavelets and then using a few simulations to estimate the distributions of the decomposition coefficients. A similar decomposition is also performed on the output random process. A kriging model is then established between the input and output decomposition coefficients and subsequently used to quantify the output random process corresponding to a realization of the input random parameters and random processes. What distinguishes our approach from others in metamodeling is that the system input is not deterministic but random. The quantified output random process is finally used to estimate the time-dependent reliability or probability of failure of the dynamic system using the total probability theorem. The proposed method is illustrated with a numerical example.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Investigation of Wear Behavior of Aluminum Alloy Reinforced with Carbon Nanotubes

SAE International Journal of Materials and Manufacturing

Bursa Technical University-Deniz Uzunsoy
Univ. of Birmingham-Tao Peng, Isaac Chang
  • Journal Article
  • 2014-01-1008
Published 2014-04-01 by SAE International in United States
The material demands for advanced technologies have led to development of new generation, light-weight, and multi-functional materials. Aluminum matrix composites (AMCs) have captured considerable attention in aviation, space and automotive industries in recent years. Carbon nanotubes (CNT) are one of the most promising candidate of reinforcements used to improve mechanical strength and hardness of metal matrix composites (MMCs). In this study, dry sliding wear behavior of aluminum (Al) matrix (MMCs) reinforced with different amounts (0, 0.5, 1 and 2 wt%) of CNTs were prepared through ball milling, the process was followed by compaction at room temperature and pressureless sintering at 630 °C under argon atmosphere for 1hr. Wear tests were performed on a pin-on-disk tribometer against SAE 1040 steel counter body under constant load and sliding speed at room temperature. Worn surfaces of composites were characterized by scanning electron microscopy (SEM) technique in order to identify dominant wear mechanism of the as-produced composite materials. Preliminary result of this study showed that the composite displayed lower wear rate and friction coefficient under mild wear conditions comparing…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Cyclic Behavior of an Al-Si-Cu Alloy under Thermo-Mechanical Loading

SAE International Journal of Materials and Manufacturing

Federal-Mogul Corp.-Scott Kenningley
Ford Motor Co.-Jianghui Mao, Carlos Engler-Pinto, Xuming Su
  • Journal Article
  • 2014-01-1012
Published 2014-04-01 by SAE International in United States
In this paper, the cyclic deformation behavior of an Al-Si-Cu alloy is studied under strain-controlled thermo-mechanical loading. Tests are carried out at temperatures from 20 °C to 440 °C. The effect of strain rate, hold time at temperature and loading sequence are investigated at each temperature. The results show that temperature has a significant effect on the cyclic deformation of Al-Si-Cu alloys. With increasing temperature, the effect of strain rate and hold time become more significant, while load sequence effects remain negligible within the investigated temperature range. Thus, an elasto-viscoplastic model is required for modeling the alloy's behavior at high temperature. This study provides an insight into the necessary information required for modeling of automotive engine components operating at elevated temperature.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Combinatorial Design Optimization of Automotive Systems by Connecting System Architecture Models with Parts Catalog

SAE International Journal of Materials and Manufacturing

Phoenix Integration Inc.-Hongman Kim, David Fried, Grant Soremekun
  • Journal Article
  • 2014-01-0319
Published 2014-04-01 by SAE International in United States
Performing system-level trade studies during the design of complex systems has many benefits in terms of performance, reliability, and cost. However, current engineering practices often do not facilitate system-level trade studies because system specifications and requirements are not connected to analytical models that are used to predict performance and cost. To bridge the gap, authors have created a bridge between system architecture models and engineering analyses. This work extends the bridge between the system modeling language (SysML) and engineering analyses to support the use of parts catalogs from system architecture models. Complex systems such as automobiles are seldom created from scratch. Rather, there are many off-the-shelf parts and subsystems available. Combined with the bridge between SysML and engineering analyses, parts catalog data available from system models enables evaluating many different configurations of a system and identifying best designs. The technical approach is demonstrated using an automobile brake design example. The integrated approach allowed generating a large number of design configurations and evaluating those using engineering analyses. Multidimensional point cloud visualization techniques were applied to identify…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Impact of Texture on r-value and its Measurement in Magnesium Alloy Sheets

SAE International Journal of Materials and Manufacturing

CanmetMATERIALS-Jidong Kang
General Motors Co.-Raja Mishra
  • Journal Article
  • 2014-01-1014
Published 2014-04-01 by SAE International in United States
The impact of texture on r-value and its measurement in magnesium alloy sheets has been studied using digital image correlation and electron backscatter diffraction techniques. Two magnesium alloy sheets with distinct textures were used in the present study, namely, AZ31 with a strong basal texture and ZE21 with a randomized texture.It is well known that a conventionally processed AZ31 magnesium sheet has strong basal texture, necessitating contraction and double twinning to accommodate thinning strain. The strain distribution on the sheet surface evolves nonlinearly with strain, impacting the measured r-value. In particular, the normal approach to measuring r-value based on average strains over the gauge section leads to the erroneous conclusion that r-value increases with deformation. When the r-value is measured locally at any point inside or outside the neck, the r-value is shown to have a constant value of 3 for all strain values. In contrast, in ZE21 magnesium alloy sheet containing 2 wt.% zinc and 1 wt.% cerium, a random texture can be obtained using an annealing schedule reaching full recrystallization of the material.…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Finite Element Modeling of Dissimilar Metal Self-piercing Riveting Process

SAE International Journal of Materials and Manufacturing

Ford Motor Co.-John V. Lasecki, Xuming Su
Nanjing University of Aeronautics & Astronautics-Li Huang, Haiding Guo
  • Journal Article
  • 2014-01-1982
Published 2014-04-01 by SAE International in United States
In present paper, the process of joining aluminum alloy 6111T4 and steel HSLA340 sheets by self-piercing riveting (SPR) is studied. The rivet material properties were obtained by inverse modeling approach. Element erosion technique was adopted in the LS-DYNA/explicit analysis for the separation of upper sheet before the rivet penetrates into lower sheet. Maximum shear strain criterion was implemented for material failure after comparing several classic fracture criteria. LS-DYNA/implicit was used for springback analysis following the explicit riveting simulation. Large compressive residual stress was observed near frequent fatigue crack initiation sites, both around vicinity of middle inner wall of rivet shank and upper 6111T4 sheet.
Annotation ability available