The Issue of Car Body Manufacture in Unibody Aluminum Alloy Design

2018 ◽  
Vol 880 ◽  
pp. 183-188
Author(s):  
Gabriela Monica Pană ◽  
Laura Diana Grigorie
Keyword(s):  
Automotive Industry ◽  
Steel Sheet ◽  
Point Of View ◽  
Optimal Solutions ◽  
Future Issue ◽  
High Productivity ◽  
Design Concepts ◽  
Aluminum Sheets ◽  
Manufacturing Technologies ◽  
Design Options

Weight reduction is the present and future issue in the automotive industry. The use of aluminum for bodywork is a growing solution due to the specific properties and the recyclability it offers. The unibody design concept with high productivity is developed for steel sheet metal car bodies. They can also be made with aluminum sheets with different product shapes (sheets, extrusions, castings etc.). The aluminum offers a wide variety of design options. The most important difference between aluminum and steel models is the predominant joining technique. In order to obtain optimal solutions from a technical and economical point of view, it is necessary to apply aluminum design concepts and correspondingly adapted manufacturing technologies.

Combinatorial Optimization of Clustering Decisions: An Application to Refine Psychiatric Diagnoses

2018 ◽  
Author(s):  
Jordan Stevens ◽  
Douglas Steinley ◽  
Cassandra L. Boness ◽  
Timothy J Trull ◽  
...  
Keyword(s):  
Combinatorial Optimization ◽  
Alcohol Use Disorder ◽  
Point Of View ◽  
Psychiatric Diagnoses ◽  
Optimal Solutions ◽  
Specific Function ◽  
Significant Information ◽  
Diagnosis Group ◽  
Clustering Problems ◽  
Unique Application

Using complete enumeration (e.g., generating all possible subsets of item combinations) to evaluate clustering problems has the benefit of locating globally optimal solutions automatically without the concern of sampling variability. The proposed method is meant to combine clustering variables in such a way as to create groups that are maximally different on a theoretically sound derivation variable(s). After the population of all unique sets is permuted, optimization on some predefined, user-specific function can occur. We apply this technique to optimizing the diagnosis of Alcohol Use Disorder. This is a unique application, from a clustering point of view, in that the decision rule for clustering observations into the diagnosis group relies on both the set of items being considered and a predefined threshold on the number of items required to be endorsed for the diagnosis to occur. In optimizing diagnostic rules, criteria set sizes can be reduced without a loss of significant information when compared to current and proposed, alternative, diagnostic schemes.

scholarly journals Design, Manufacturing and Test of CFRP Front Hood Concepts for a Light-Weight Vehicle

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1374
Author(s):  
Paul Bere ◽  
Mircea Dudescu ◽  
Călin Neamțu ◽  
Cătălin Cocian
Keyword(s):  
Automotive Industry ◽  
Design Concept ◽  
Torsional Stiffness ◽  
Material Structure ◽  
Black Metal ◽  
Design Concepts ◽  
Metal Design ◽  
Body Components ◽  
Cost Efficient ◽  
Transversal Stiffness

Composite materials are very often used in the manufacture of lightweight parts in the automotive industry, manufacturing of cost-efficient elements implies proper technology combined with a structural optimization of the material structure. The paper presents the manufacturing process, experimental and numerical analyses of the mechanical behavior for two composite hoods with different design concepts and material layouts as body components of a small electric vehicle. The first model follows the black metal design and the second one is based on the composite design concept. Manufacturing steps and full details regarding the fabrication process are delivered in the paper. Static stiffness and strain values for lateral, longitudinal and torsional loading cases were investigated. The first composite hood is 254 times lighter than a similar steel hood and the second hood concept is 22% lighter than the first one. The improvement in terms of lateral stiffness for composite hoods about a similar steel hood is for the black metal design concept about 80% and 157% for the hood with a sandwich structure and modified backside frame. Transversal stiffness is few times higher for both composite hoods while the torsional stiffness has an increase of 62% compared to a similar steel hood.

Development of Bionic Design Concepts for Structure Optimisation of Forming Tools According to Production and Stress Constraints

2011 ◽  
Vol 473 ◽  
pp. 209-216
Author(s):  
Eugen Oswald ◽  
Mathias Liewald ◽  
Oliver Stephan
Keyword(s):  
Automotive Industry ◽  
Stress Constraints ◽  
Bionic Design ◽  
Design Concepts ◽  
Special Cases ◽  
Current Design ◽  
The Right ◽  
Forming Tools ◽  
Current Standards ◽  
Made In

In the automotive industry, current design and dimensioning of forming tools and bearing tool components occurs according to guidelines. Possible interactions between arising loads as well as dimensioning are empirically estimated. Simulative computations, which are based on CAE-methods, are only realized in special cases. Therefore, most often current standards lead to oversized tools. In consequence, new studies based on CAE-analyses are supposed to investigate new possibilities to design forming tools and components optimized in their structure corresponding to the right distribution of forces and stress. This is made in order to increase reliability during the manufacturing process, as well as the tools’ stiffness and contribute to decrease of investment costs.

scholarly journals A characterization of optimal multiprocessor schedules and new dominance rules

2020 ◽  
Vol 40 (4) ◽  
pp. 876-900
Author(s):  
Rico Walter ◽  
Alexander Lawrinenko
Keyword(s):  
Parallel Machines ◽  
Computational Study ◽  
Search Space ◽  
Point Of View ◽  
Theoretical Point ◽  
Optimal Solutions ◽  
Identical Parallel Machines ◽  
Makespan Minimization ◽  
Structural Pattern

Abstract The paper on hand approaches the classical makespan minimization problem on identical parallel machines from a rather theoretical point of view. Using an approach similar to the idea behind inverse optimization, we identify a general structural pattern of optimal multiprocessor schedules. We also show how to derive new dominance rules from the characteristics of optimal solutions. Results of our computational study attest to the efficacy of the new rules. They are particularly useful in limiting the search space when each machine processes only a few jobs on average.

The Properties of Welded Joints Made by 6082-T6 Aluminium Alloy and their Behaviour under Cyclic Loading Conditions

2015 ◽  
Vol 812 ◽  
pp. 375-380 ◽  
Author(s):  
D. Pósalaky ◽  
János Lukács
Keyword(s):  
Cyclic Loading ◽  
Automotive Industry ◽  
Welded Joints ◽  
Structural Engineering ◽  
Physical Simulation ◽  
Base Material ◽  
Point Of View ◽  
Test Results ◽  
Structural Elements ◽  
Effective Use

The magnitude of different aluminium alloys, especially the ones with higher strength, are increasing in the structural engineering, not just the usual applications (like the aerospace industry) but more likely in the automotive industry. There are more assumptions of the effective use of aluminium; we should highlight two important factors, the technological and the applicability criterions. The technological criterion is the joining of structural elements, frequently with welding thus the technological criterion ultimately is the weldability. The assumption of applicability comes from the loading capability of these structures, which is typically cyclic loading so the key issue from the point of view of applicability is the resistance to fatigue. This article represents physical simulation and fatigue test results both on the base material and on the welded joints.

scholarly journals ACTUALIZATION OF PROBLEMS AND NOVELS OF THEORETICAL AND LEGAL SEGMENTS OF CERTAIN BANKRUPTCY PROCEDURES

2020 ◽  
Vol 73 ◽  
pp. 87-94
Author(s):  
Vitaliy Kadala ◽  
◽  
Olena Guzenko ◽  
Keyword(s):  
Business Environment ◽  
Point Of View ◽  
Entrepreneurial Activity ◽  
Main Task ◽  
Doing Business ◽  
Management Measures ◽  
Legislative Regulation ◽  
Definition Of ◽  
Design Options ◽  
Legal Entities

The article is devoted to the issues of actualization of problems and novelties in the context of theoretical and legal segments of the bankruptcy procedure. The activities of economic entities are influenced by external and internal factors, but the issues of their solution remain in most cases in the discussions of politicians, scientists and representatives of the business environment. The effectiveness of legal entities has recently proved that the application of bankruptcy proceedings has intensified. However, remediation issues do not always have and receive adequate support. The consequence of these phenomena is the cessation of activities not only of small and medium-sized businesses, but also of individual large businesses. The main task of modern enterprises on the verge of bankruptcy is to develop tools and tools that allow to predict and analyze potential crises, to design options for their resolution and the appropriate information and economic base of management. Practical entrepreneurial activity proves that a number of issues remain unresolved and need more in-depth research and attention. This phenomenon indicates the modernity and relevance of the study given the realities of the functioning of legal entities. The article draws attention to the legislative regulation of bankruptcy procedures, identifies the priorities of legislative initiatives. The question of the scientific position of scientists concerning the characteristic of the conceptual categories "bankruptcy" and "remediation" is investigated. The author's vision of the essential characteristics of these categories is given, the substantiation of expediency of their adaptation in activity of domestic enterprises is given. A package of anti-crisis management measures has been developed taking into account the current realities of doing business. Proposals for improving the legislative regulation from the standpoint of reorganization procedures are presented. The development, approval and adaptation of the "Regulations on the stages of remediation" is proposed. From the author's point of view, it is expedient to include in the structure of the legislative regulator: conceptual apparatus for reorganization procedure, definition of methods and techniques of evaluation of clearly defined criteria with establishment of their normative limits, coverage of monitoring procedures.

Surface Integrity of a High Speed Milling FC300 Gray Cast Iron

2013 ◽  
Vol 465-466 ◽  
pp. 642-646 ◽  
Author(s):  
Abu Bakar Mohd Hadzley ◽  
Mohamad Raffi Nurul Fatin ◽  
Raja Abdullah Raja Izamshah ◽  
Nur Izan Syahriah Hussein ◽  
Ahmad Siti Sarah ◽  
...  
Keyword(s):  
Cast Iron ◽  
Automotive Industry ◽  
High Speed ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Surface Finishing ◽  
High Speed Machining ◽  
High Productivity ◽  
Die Surface ◽  
End Mills

The high speed machining (HSM) of gray cast iron for manufacture mold and dies involve many different cutting tool from deep hole drills to smallest ball nose end mills [. Due to the demand of fast and high productivity, high speed machining (HSM) has been increasingly used to produce mold and dies that are mostly used in automotive industry especially for stamping dies components. The process of HSM sometimes combined together with manual polishing to enhance the die surface into fine mirror finish. Although the manual polishing strongly depends by experience and skill of workers, this technique is the preferable option for polishing of moulds and dies. However, such extensive manual polishing will provide some drawback because of many human factors such as pressure and technique of polishing individual person uses. Therefore, the application high speed machining in manufacturing is still demanding as it can improve surface finishing by reducing manual polishing, reportedly account for up to 30% of the total time [2].

Development of aluminium-clad steel sheet by roll-bonding for the automotive industry

2007 ◽  
Author(s):  
M. Buchner ◽  
B. Buchmayr ◽  
Ch. Bichler ◽  
F. Riemelmoser
Keyword(s):  
Automotive Industry ◽  
Steel Sheet ◽  
Roll Bonding ◽  
Clad Steel

Successful Moveable Bridges

2019 ◽  
Author(s):  
Kjeld Thomsen ◽  
Christian Riis Petersen
Keyword(s):  
Operation Time ◽  
Cost Effective ◽  
Modern Technology ◽  
Point Of View ◽  
Maintenance Cost ◽  
Hydraulic Systems ◽  
Design Concepts ◽  
Electrical Systems ◽  
Low Weight ◽  
Selection Of

<p>The present paper describes developments in the design of the most common types of movable bridges – Bascule bridges and Swing Bridges. The selection of design concepts is influenced by span, foundation conditions as well as environmental issues. Application of modern hydraulic systems and innovative bearing types for swing bridges facilitate the creation of outstanding designs. Recently built moveable bridges in Denmark exemplifies the trend and how application of modern technology and creativity can lead to outstanding solutions. There are many governing parameters such as the span, free opening height and loading conditions. Equally important issues such as surroundings, landscape, foundation conditions, requirement to low weight, achievable tolerances and from a mechanical point of view, the operation time. Risk assessment, mechanical- and electrical systems and the requirement to operation time and maintenance cost, will have influence on the selection of machinery and the architectural and structural design. For each of the moveable bridges described, it is shown how innovative application of modern bearing concepts and hydraulic systems can lead to elegant and cost-effective solutions.</p>

E-Transformation of Austrain SMEs

2004 ◽  
pp. 216-230
Author(s):  
Christoph Auer
Keyword(s):  
Action Research ◽  
Literature Review ◽  
Business Model ◽  
Automotive Industry ◽  
Point Of View ◽  
University Research ◽  
Industry Sector ◽  
The Impact

This chapter highlights the differences that exist between the e-commerce (EC) perspective of SMEs and the EC perspective from the researchers’ point of view. First the main aspects of SME EC found in a literature review are pointed out and then the results of a SME survey are presented. The findings of this survey, conducted with Austrian SMEs in the automotive industry sector, show for example that EC adoption is slower than expected. Consequently, we introduce a concept that was developed to minimize the identified gap between the two EC perspectives, by connecting university research and regional SME networks more efficiently. This action research-based approach enables SMEs to evaluate the impact of EC on their business model.

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