scholarly journals ANÁLISE DO PROCESSO DE DEFINIÇÃO DE REQUISITOS EM SOFTWARE COM UM ESTUDO DE CASO EM UMA EMPRESA DE METAL DESIGN

2019 ◽  
Author(s):  
Amanda Mendonça ◽  
Ananda Dantas ◽  
Sanderson Barbalho
Keyword(s):  
Metal Design

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.

Unfolding Method of Non-Developable Surface for Sheet-Metal Design

2014 ◽  
Vol 1022 ◽  
pp. 60-63
Author(s):  
Bo Sun ◽  
Xiao Long Wang
Keyword(s):  
Sheet Metal ◽  
Energy Method ◽  
Developable Surface ◽  
Metal Design ◽  
Unfolding Method

The organized vertex coordination of the triangular surfaces is obtained by the meshing method in the 3D kernel based developing environment. To optimize the flattened form, the energy method is used to find the reasonable unfolding scheme, which seeks the solution to minimize the deforming energy generated when flattening the triangular surfaces. This algorithm is not the fastest one, but the versatile one especially for the non-developable surface with a large bending degree. With the unfolding method and the 3D kernel environment, the 3D unfolding system for the arbitrary surface satisfying the requirements is constructed.

Sheet Metal Design with Modeling Kernels Technology

2012 ◽  
Vol 457-458 ◽  
pp. 467-471
Author(s):  
Zheng Liu ◽  
Bo Sun
Keyword(s):  
Sheet Metal ◽  
Metal Design

scholarly journals Radiocarbon Dating of Millimole-Sized Gaseous Samples

Radiocarbon ◽  
1983 ◽  
Vol 25 (2) ◽  
pp. 485-492 ◽  
Author(s):  
Dušan Srdoč ◽  
Bogomil Obelić ◽  
Nada Horvatinčić
Keyword(s):  
Careful Selection ◽  
Counting Period ◽  
Relative Standard ◽  
Initial Drop ◽  
Metal Design ◽  
Background Counting ◽  
Lower Background ◽  
Gas Gain ◽  
Selection Of

As an alternative to the accelerator technique, a simple, compact, small counter system has been developed and tested for routine 14C dating. Our small counter is an all-metal design made of the OFHC copper with quartz supports for the anode (25μm stainless steel). Careful selection of materials for the counter construction was made based on the measurements of the alpha contamination. Methane as the counter filling gave better resolution and gas gain stability, whereas CO2 gave lower background counting rate and it was easier to prepare and to handle. The long term run using CH4 showed that the gas gain remained stable within 1–2% for months after the initial drop which followed the counter filling. A 7-day counting period was sufficient to achieve a 3% relative standard deviation which was considered acceptable for routine dating of younger samples.

Mathematical Models and Polyhedral Studies for Integral Sheet Metal Design

2012 ◽  
Vol 22 (4) ◽  
pp. 1493-1517
Author(s):  
Carlos E. Ferreira ◽  
Ute Günther ◽  
Alexander Martin
Keyword(s):  
Mathematical Models ◽  
Sheet Metal ◽  
Metal Design

scholarly journals A study for differences between different design drawing programs in sheet metal design

2018 ◽  
Vol 213 ◽  
pp. 01002
Author(s):  
Yu-Che Huang ◽  
Tien-Chaun Yeh
Keyword(s):  
Sheet Metal ◽  
Metal Structure ◽  
Basic Structure ◽  
Structure Design ◽  
Design Flow ◽  
Processing Technology ◽  
3D Graphics ◽  
The Future ◽  
Metal Design ◽  
Design Case

Most appearance and structure design has always been based on the product processing technology as the spindle, in general; sheet metal design changes in the appearance of the structure is based mainly on the basic structure of products and processing technology as the main core, and the appearance of manufacturing more Mechanical sheet metal, so most designers will use different design procedures to draw 3D graphics in the assembly or disassembly of parts, but different drawing procedures will affect the future assembly and disassembly of the design. In this study, we will compare two different models by building a model program using two different sheet metal structure drawings to present the problems that may be encountered in sheet metal design through a specific design flow. Through a real 3D drawing and design case, 3D graphics design flow, and finally through a design case to do a verification, to provide a reference for the future design.

Manufacturability of Sheet Metal Design with the Help of Product Data Management (PDM)

2013 ◽  
Vol 572 ◽  
pp. 331-334 ◽  
Author(s):  
Merja Huhtala ◽  
Mika Lohtander ◽  
Juha Varis
Keyword(s):  
Data Management ◽  
Sheet Metal ◽  
Product Information ◽  
Life Time ◽  
Product Data Management ◽  
Design Intent ◽  
Product Data ◽  
Product Service ◽  
Metal Design ◽  
Product Realization

In the today’s industry the sheet metal design plays a huge role, it has been said that almost the half of the designing is concentrating to sheet metals. But the lack of knowledge of the typical sheet metal aspects and basic rules of sheet metal designing, has led in to situation where more and more products are poor designed. This automatically leads to situation that the products are not manufacturing friendly. Designing time is shortening year after year, so the pressure to design the part as fast as possible is huge. Unfortunately all the design information and the design intent is processed and filtered to be fit for the Product Data Management (PDM) system. As the PDM was firstly designed to be used only for the storage base for the design drawings and other data; the feature-information and design intent is lost. This paper deals with two distinct yet interlinked themes. The first theme is the new requirements set for the new Product (Life-time) Information systems that can save the product information and design intent. And the second theme is the modern, light-weight and updatable product-services that allow the manufacturability to be ensured before product realization. With the help of novel product-service such as Design Manufacturing and Assembly (DFMA) for sheet metal industry designers will able to design in shorter time manufacture friendly sheet metal products.

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