Influence of manufacturing process technology on buckling behaviour of thinwalled, GFRP columns with a square cross-section

2021 ◽  
Author(s):  
Paweł Czapski ◽  
Tomasz Kubiak
Keyword(s):  
Cross Section ◽  
Manufacturing Process ◽  
Process Technology

scholarly journals Eco-friendly technology of manufacturing complex products made of composites

2019 ◽  
Vol 140 ◽  
pp. 02004
Author(s):  
Aleksey Ignatov ◽  
Rustam Subkhankulov
Keyword(s):  
Composite Materials ◽  
Cross Section ◽  
Manufacturing Process ◽  
Volume Fraction ◽  
Turbine Blades ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Technological Parameters ◽  
Technological Support ◽  
The Impact

Numerous studies in application of modern composite materials show that their advantages can be successfully implemented in manufacturing «smart» products. This study proposes an improved technological method of manufacturing multilayer environmentally friendly products with a variable cross section, which allows us to expand the possibilities of using modern polymer composite materials (PCM). The technology allows manufacturing products of the most complex geometric shapes, such as wind turbine blades. The aim of the study is the technological support of engineering production in the manufacture of multilayer products of variable cross section made from PCM. Scientific novelty consists in identifying the patterns of implementation and management of the manufacturing process of multilayer products of variable cross-section, and establishing the influence of structural and technological parameters of the manufacturing process on their operational characteristics. The relationship between the pressure of a hot directed air stream and the volume fraction of pores in the hardened material of a multilayer composite product with a variable cross section during layer-by-layer application is investigated. During the study, fundamental and applied principles of mechanical engineering technology, material resistance, adhesion theory, mathematical statistics tools and software were used to process the results of the experiment. Based on the results of laboratory studies, a methodology has been developed for effective prediction of pore content in the manufacturing of composite products. The introduction of the presented technology and the corresponding original methodology into production will reduce the complexity and energy costs of manufacturing composite products, improve their quality and reduce the impact of toxic components from composite materials on workers.

scholarly journals Effect of a Metal Thin Film's Residual Stress and Manufacturing Process on Thin Film Micro-Crack

2020 ◽  
Vol 58 (3) ◽  
pp. 175-181
Author(s):  
Byung-Kyu Cho ◽  
Seung-Chan Hong ◽  
Byung-Sam Kim ◽  
Jae-Kyung Cheon
Keyword(s):  
Thin Film ◽  
Tensile Stress ◽  
Manufacturing Process ◽  
Residual Tensile Stress ◽  
Process Technology ◽  
Chrome Plating ◽  
Touch Sensor ◽  
Micro Cracks ◽  
Thin Film Layer ◽  
Film Layer

In recent automobile trends, the functions of opening and closing the vehicle door are accomplished by touch sensor and smart-phone NFC (Near Field Communication) systems. These convenience features are incorporated into the outdoor handle. However, this function can’t be used when chrome plating is applied to this part for design purposes. To solve the problem of chrome plating, we studied a metal sputtering deposition process technology, which can preserve the metal feeling without interfering with NFC and touch sensor operation. To achieve this interface communication and sensing performance, we developed a surface treatment that can generate micro-cracks in the thin film layer. We also investigated how the door handle manufacturing process affected the shape of the micro-cracks in the thin film. Results showed that the thickness of the thin film and the target power played a crucial role in controlling the residual tensile stress in the thin film, which was one of major factors responsible for generating micro-cracks in the thin film layer. The shape of the micro-cracks in the thin film was affected by the adjacent layers of the thin film, the primer paint and UV top coat. The surface energy of the primer paint and the shear stress produced by the hardening of the UV top coat were found to affect the shape of the micro-cracks. In addition, we found that there was no change in the shape of the micro-cracks with additional heat treatment, if the residual tensile stress was sufficiently relieved by the micro-cracks formed in the thin film. The slits between the micro-cracks in the outdoor handle cover allowed the Capacitance Sensor and NFC to perform.

scholarly journals The Production of Plaster Molds with Patternless Process Technology

2015 ◽  
Vol 15 (2) ◽  
pp. 91-94 ◽  
Author(s):  
R. Pastirčák ◽  
A. Sládek ◽  
E. Kucharčíková
Keyword(s):  
Surface Roughness ◽  
Rapid Prototyping ◽  
Feed Rate ◽  
Manufacturing Process ◽  
Dimensional Accuracy ◽  
Mold Cavity ◽  
Drying Process ◽  
Process Technology ◽  
Batch Production ◽  
Gravity Casting

Abstract The work deals with technology Patternless process that combines 3 manufacturing process mold by using rapid prototyping technology, conventional sand formation and 3D milling. It's unconventional technology that has been developed to produce large-sized and heavyduty castings weighing up to several tons. It is used mainly in prototype and small batch production, because eliminating production of models. The work deals with the production of blocks for making molds of gypsum and gypsum drying process technology Thermomold. Into blocks, where were made cavities by milling were casted test castings from AlSi10MgMn alloy by gravity casting. At machining of the mold cavity was varied feed rate of tool of cemented carbide. Evaluated was the surface roughness of test castings, that was to 5 micrometers with feed from 900 to 1300 mm/min. The dimensional accuracy of castings was high at feed rate of 1000 and 1500 mm/min did not exceed 0.025 mm.

scholarly journals Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment

2018 ◽  
Vol 66 (2) ◽  
pp. 111-116
Author(s):  
Inês de Fátima de Azevedo Jacinto INOJOSA ◽  
Hélio Pereira LOPES ◽  
Phillip Lucas Ricardo PEREIRA ◽  
Diogo Lopes do NASCIMENTO ◽  
Carlos Nelson ELIAS ◽  
...  
Keyword(s):  
Cross Section ◽  
Fatigue Resistance ◽  
Manufacturing Process ◽  
Fracture Resistance ◽  
Niti Alloy ◽  
Fatigue Behavior ◽  
Morphological Characteristics ◽  
Static Fatigue ◽  
Number Of Cycles ◽  
Fractured Surface

ABSTRACT Objective: This study compared the fatigue behavior of endodontic instruments manufactured with conventional NiTi alloy electropolishing, RaCe (FKG Dentaire, LaChauxdeFonds, Switzerland), with instruments manufactured with NiTi CM Wire subjected to thermomechanical treatment, in the manufacturing process, HyFlex CM (Coltène Whaledent, Cuyahoga Falls, Ohio, USA), both with similar geometry and dimensions in order to determine the influence of the manufacturing process in the fatigue resistance. Methods: The methodoly consisted of twenty HyFlex CM and RaCe instruments with D0 0.25 mm, taper 0.06 mm / mm, 25 mm length, both with triangular cross section. The fracture resistance was evaluated by static fatigue test, using a stainless artificial canal with 5mm of radius (86°), recording the time and calculating the number of cycles until fracture occurs (NCF). For statistical analysis the Student t test was used The fractured instruments surface was analyzed by SEM. Results: The NCF was significantly higher for HyFlex CM instruments in comparison with RaCe files (P˂0.05) being 1336% more resistant to fatigue. The analysis of the fractured surface by SEM showed ductile-kind morphological characteristics for both instruments and the absence of plastic deformation. Conclusion: HyFlex CM instruments present higher values of NCF. Thus, it can be concluded that the thermal treatment to which these instruments with CM Wire alloy are submitted makes them more resistant to fracture than Race instruments manufactured with conventional NiTi alloy electropolishing.

Improvement of the Mechanical Properties of Formed Steel Cross Section Profile for Timber Upgrading

2012 ◽  
Vol 498 ◽  
pp. 139-144
Author(s):  
C. González-Bravo ◽  
J. Claver ◽  
R. Álvarez ◽  
Rosario Domingo
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Cross Section ◽  
Manufacturing Process ◽  
Mechanical Characteristics ◽  
Section Profile ◽  
Cold Formed Steel ◽  
Deform 2D ◽  
Cross Section Profile

The main objective of this paper is to analyze the behaviour of cold formed steel cross section respect to mechanical characteristics, such as deflection, mainly. A cold formed steel profile with thickness of 1 mm regards is studied to determine its viability as reinforcement of timber upgrading. Thus, temperatures, stresses and strains have been analysed during the manufacturing process of these profiles, and also, the deflection supported, comparing between unreinforced and reinforce pieces. The analysis has been carried out by means of Finite Element Method, using DEFORM 2D software, during the simulation of manufacturing process and COPRA software during the final static computations. Results provide information about the integrity and good behavior of these profiles for timber upgrading.

LINKING COMPETITIVE STRATEGY AND MANUFACTURING PROCESS TECHNOLOGY

1995 ◽  
Vol 32 (2) ◽  
pp. 163-189 ◽  
Author(s):  
Dean M. Schroeder ◽  
Steven W. Congden ◽  
C. Gopinath
Keyword(s):  
Manufacturing Process ◽  
Competitive Strategy ◽  
Process Technology

MANUFACTURING PROCESS TECHNOLOGY and SUPPORT STAFF COMPOSITION: AN EMPIRICAL VIEW OF INDUSTRY EVIDENCE

2009 ◽  
Vol 1 (1) ◽  
pp. 5-21 ◽  
Author(s):  
PETER T. WARD ◽  
PAUL D. BERGER ◽  
JEFFREY G. MILLER ◽  
STEPHEN R. ROSENTHAL
Keyword(s):  
Manufacturing Process ◽  
Support Staff ◽  
Process Technology ◽  
Staff Composition
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